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Bob Cleek

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  1. Like
    Bob Cleek got a reaction from FriedClams in Cangarda 1901 by KeithAug - Scale 1:24 - Steam Yacht   
    Great progress, Keith! Congratulations on the great outcome on your surgery.
     
    Just a thought in passing: These days (in the US, at least) many of the surgical instruments used are "disposable." It's not worth the cost in time and labor to autoclave and sterile package them after each use as was done in the good old days. Regrettably, I expect some of these discards are piled up for sale in large lots to resellers on eBay or to be resold in Third World countries and a lot of it is now sent to the landfill as "bio-hazard waste." You might mention to your surgeon that you'd appreciate it if s/he would save the disposable instruments for you. There's probably a nice Castroviejo iris scissors in your surgical tray, along with maybe some nice tweezers. The eye and micro-surgeons have the best medical instruments to repurpose for modeling use. Unfortunately, I lost my "connection" for "dull," (a relative term) dental burrs some time ago when my friend, and institutional dentist working for the state, told me they were now under an order to "bio-hazard bag" all their discards without exception.  I suppose that's a prudent protocol, but I hate to think that for every kid that makes a trip to the emergency room, there's a nice needle holder that goes into the trash bin.  
  2. Like
    Bob Cleek reacted to Roger Pellett in drilling hole through wire   
    I like to drill with conventional HSS Drill bitts.  I use my Sherline Lathe fitted with a milling column and sensitive drilling attachment.  This allows me to clamp the object being drilled in a vise secured to the lathe cross slide to accurately position the drill bit over the center punched mark.  I do not have the touch for using carbide drill bitts.  They usually shatter on the first hole.
     
    My current project involves cross drilling a .020” hole through a 1/16” brass tube.  I need 48 of these tiny pieces.  I decided to drill them as a row of holes along the tube, the individual pieces to be cut apart later.  I filed a flat on the top of the tube and center punched each hole location.  I had bought a brand new set 61-80 Gyros Brand wire sized drills from Amazon. I chucked the correct sized drill bitt and started drilling.  Each of the first 8 holes took forever even with considerable pressure on the drill.  Different lubricants and drill speeds made no difference.  Frustrated, I rummaged around my tool supplies and found a similar sized no-named drill bitt bought long ago.  It drilled through each hole like it was butter. 
     
    The Gyros drills heavily promoted by Amazon are Chinese Imports. I just ordered a set of Made in USA replacements.  
     
    Roger
  3. Like
    Bob Cleek reacted to wefalck in SMS WESPE 1876 by wefalck – 1/160 scale - Armored Gunboat of the Imperial German Navy - as first commissioned   
    Apologies to all, who looked here in vain for new developments, but real life severely interfered with my workshop time and the zen mental state to carry out miniature work ...
     
    In the meantime, I wish all Forum Members a peaceful Christmas and a successful New Year 2024 !

  4. Like
    Bob Cleek reacted to Dr PR in SS Blagoev ex-Songa 1921 by Valeriy V - scale 1:100 - Soviet Union   
    Another bit about rivets as a reference to putting them on models.
     
    On the Cleveland class cruisers of WWII that I am familiar with. Below the water line rivet heads were to be "as nearly flush as possible." The leading edges of hull plates of different thicknesses were chamfered by grinding to about 45 degrees. Backing plates were inside the hull plating. Quite a bit of effort was made to reduce drag.
     
    Above the water line backing plates were outside the hull plating. Rivet heads were visible if you were standing close to them, but had very slight height above the plating and slightly conical. This was also true of the rivets on the turrets.
     
    None of the riveting would be noticeable from more than a few yards/meters distant. There is no reason to put them on models.
     
    I don't know how many decades this type of riveting goes back before the 1930s, but at some point builders began taking steps to reduce underwater drag.
  5. Like
    Bob Cleek got a reaction from Canute in drilling hole through wire   
    You might want to check out Model Building with Brass by Ken Foran. Model Building with Brass book by Ken Foran (thriftbooks.com) This relatively new book contains a wealth of information on the subject.
     
    There are surely those with far more experience that I who will weigh in, so for what little it may be worth, if it is the "fork on a rod with a hole drilled in a thick spot just above the neck of the fork" in the diagram that you want to make, you might want to "do the math" first. While I can't tell from the drawing whether the hole is to be drilled through a "flattened" section of the rod or through a round sectioned "swelled" or "ball" section of the rod, either way, I don't think you can fabricate a 1.70 MM flat (or "ball") with a .50 MM (or slightly larger) hole on a length of 1.15 MM brass rod without adding material to the 1.15 MM rod stock. There doesn't seem to be enough "meat" there to work the available material do it.
     
    I don't know if you have a suitable lathe, which would make the task relatively easy, but even without a lathe, the task is possible, but will take more care and time. Simply put, the fork, neck, and "ball with a hole in it" is formed from square bar machinable brass and the 1.15 MM wire stock is silver-soldered into a hole in the end of the "ball with a hole in it. As the part looks like it's not the only one on the model, machining it as explained below makes the uniform fabrication of a number of the same part a lot easier "on an assembly line" basis. You can modify the following suggestion to suit the tools you have available if necessary. 
     
    1.)     Cut a section of solid machinable square brass bar stock of the exact square section size as the forks and as long as the distance between the open end of the fork and the "ball with a hole in it, plus a suitable length to permit drilling a tailstock center and parting off at the end of the "ball with a hole in it."  If the forks are not square in section, use square stock the same size as the widest dimension of the fork. If you can't find square bar stock exactly the size of the fork's (widest) outside dimension, use square bar stock of the least-oversized bar stock available. 
     
    2.)     Using machinist's "Prussian blue" or alcohol soluble permanent marker ink, carefully layout the placement of the two holes necessary the shape of the fork ends, the "notch" in the solid square bar to be removed to form the two sides of the fork, the shape of the ends of the fork sides, the "neck" of the fork, and the diameter of the "ball" section.  If you must use bar stock that is oversized and/or the fork is rectangular in section, layout the amount of waste to be removed to reduce the fork to the proper outside dimensions taking care that the amounts to be removed are equal on both sides of the stock retained in order to retain the concentricity of the forks, the "neck" and the "ball with a hole in it. Also mark the dead centers of each end of the section of bar stock.
     
    3.)      Preferably using a drill press or mill/drill (preferably with an x-y table) to ensure perpendicularity, drill two holes of the required diameter(s) entirely through the flat-sided solid bar stock in the appropriate locations, one to form the eyes of the fork and one to form the hole in the "rod." (These two holes are drilled parallel to each other through the centerline of the bar stock.) Carefully drill a suitably sized center hole in the "ball with a hole in it" end of the bar stock to accommodate the lathe tailstock center, which would preferably be a live center if one is available.
     
    4.)     Chuck the fork end of bar stock into the lathe headstock and mount the tailstock center into the other end of the bar. Turn the shapes of the fork shoulders, "neck" between the fork shoulders and the "ball with a hole in it," and the "ball" itself following the layout forming the "shoulders and neck" of the fork and the "ball" shape as per the layout and the detail of the part shape as you've laid it out. (The .50 MM hole will end up exactly in the middle of the "ball" section if your layout and drilling was accurate.) Turning the "ball" shape can be done using a file to shape it by eye (and template), by a custom half-round cutting tool, or a template and "duplicating" attachment on the lathe, or even a "ball turner" if one is available. However, the shape of the end of the ball where the hole will be drilled to insert the 1.15 MM wire must be decided first. If it is to have a "sharp" transition, the end of the ball can be perfectly round. If it is to appear to transition gradually to the diameter of the 1.15 MM wire, the curved transition will have to be formed when turning the ball. The completion of the forming of the end of the ball, however, is best done by parting off the surplus end of the bar and doing the shaping "in the open" free of the tailstock center. When the "ball with the hole in it has been parted, but the "bottom end" not completely turned, leaving the workpiece in the headstock chuck, place a tailstock chuck holding a 1.15 MM drill bit in the tailstock and, using the tailstock advance, drill through the center of the end of the ball end and through to hole in the ball. Then finish the turning of the ball end. If a curved shoulder transition between the ball and the 1.15 MM wire is desired, a short piece of the 1.15 MM wire can be inserted and the "shoulder" between the ball and the wire worked right up to the wire to turn a seamless transition. Note, however, that there isn't a lot of "meat" in the "ball" to hold the 1.15 MM wire. The larger you can make the "ball," the more space there will be for the 1.15 MM hole. By your measurements, there will only be .275 MM on either side of the 1.15 MM hole into the 1.70 MM ball. This won't matter once a good silver-soldered joint is making it all one piece, but the size of the hole will impact the appearance of the ball and you may have to do some drawing and planning of the shape of the ball so the appearance of a "swelled ball on a 1.15 MM shaft" is achieved. An experimental "dry run" on the wire to ball connection is probably indicated and it may be necessary to turn down the diameter of the 1.15 MM wire to provide a "peg" at the end to be soldered into a smaller hole in the "ball." +
     
    5.)       Remove the workpiece from the lathe. If the fork is smaller than the bar stock on two or four sides, carefully remove the excess material to yield the proper dimensions of the fork. This is a piece of cake if you have mill or even a drill press with an x-y table as it is light work.  Otherwise, a flat belt or disk sander or file should do the trick. With the dimensions of the fork established, shape the ends of the fork (simultaneously) using whatever tools are available. (They appear to be half-rounded.)
     
    6.)    After forming the ends of the fork sides, using a mill if you have one, or a jeweler's saw and files if you don't, remove the waste center of the solid bar to form the space between the two fork sides. This is tricky If not using a mill.  Using hand tools demands that care be taken to cut sufficiently "wide of the line" to permit accurate filing or using abrasive tape to ensure straight and perpendicular faces of the jaws on either side of the open space between them. The "slot" between the fork sides has to be accurately machined if the resulting fork is to look good. Accurate layout is essential. If the slot cannot be milled, a drill press (preferably with an accurate x-y table) can be used to drill a series of suitably sized holes through the square stock to remove most of the waste between the fork sides. Assuming the "waste removal" holes are accurately drilled, they can provide a valuable index for hand-shaping. The bulk of the waste can be roughly removed by sawing with a jeweler's saw to "connect the holes" and files can rough out the rest, taking care not to remove any material deeper than the edge of the drilled holes. Once "roughed out," machinist's "Prussian blue" or an alcohol-soluble permanent marker can be used to mark the faces of the exactly drilled "waste removal" holes. Thus marked, final shaping can be completed very accurately using the "bluing" to indicate the desired "flat" to be formed.
     
    7.)    Polish the part as required. Clean the part well as per standard silver-soldering procedure paying particular attention to the inside of the 1.15 MM hole in the end of the "ball with the hole in it. Insert a suitable length of 1.15 MM wire in the hole in the end of the ball to a depth which is not less than the inside edge of the drilled hole inside end of the 1.15 MM hole. This is essential to provide as much of a contact surface between the two parts as possible for the solder joint as discussed above. Silver-solder the two pieces together.  Using a drill and/or a round jeweler's file, remove the end portion of the 1.15 MM wire inside the hole in the "ball with a hole in it" so that the inside of the hole is smooth all around. Remove any excess solder from the face of the piece. The silver-solder joint on the face of the "ball" and inside the hole in the ball, should be invisible if you are better at it than I usually am.  
     
    As usual, it's easier done than said. Hope this helps.
  6. Like
    Bob Cleek got a reaction from Canute in Cool Little Block Plane   
    That was exactly what I thought. Once you get down to eight or sixteen sides, rounding it up is a piece of cake with a sheet of sandpaper. (In real life, they might rough out the shape of a solid mast or spar with an adze, but the finish work would have been done with a spar plane, which would have a concave sole and iron sized to match the circumference of the spar. It would take a set of these to get an accurately rounded spar.) I was thinking of a similar arrangement, but rather than a shim that slid under the spar, there would be a grooved "bench hook" base to hold the spar for planing and a threaded "jack" that could be finely adjusted to raise the base and the degree of taper one desired. Once the measurements were identified, an "inches per foot" taper index for each of the scales one used could be attached, making setup even less tedious. A plane would run on a "sled" or in a level track to cut the taper set by the amount of rise above the track set by the "jack" adjustment. This sort of a jig could also be used for cutting scale scarfs. It's the way many scarfs are made in full-size construction these days, often with a router base mounted on a sled running on an angled base.
     
     
  7. Like
    Bob Cleek got a reaction from Canute in Cool Little Block Plane   
    I've heard good things about that HP-8 plane. (They also sell a stainless and titanium "commemorative model" for $300.) The Bridge City catalog is very entertaining. They seem to be the Tiffany's of tools and priced similarly as well! Real jewelry for tool nuts. See: Planes – Bridge City Tool Works (bridgecitytools.com) 
     
    Bridge City offers a chopstick tapered planing jig that uses the HP-8 plane called the "Chopstick Master." It seems that with a little bit of re-engineering, it could be a really neat tool for making tapered scale masts, spars, and dowels. The catch, of course, is that this jig system would probably cost you more than a Proxxon wood lathe! It's worth taking a look at it if anybody is considering building a jig for planing "sticks." Bridge City makes theirs fancy, of course, but the principles of their jig may be adaptable for modeling use. See: Mini Workshop – Bridge City Tool Works (bridgecitytools.com)
  8. Like
    Bob Cleek reacted to Baker in Buccaneer by ToniSk - OcCre - 1:100 - first build   
    Planking at the bow is tapered. Forget YouTube for a moment and read some PDFs first.
     
    Remember,  planking is not a race. 
    First
    read the pdf'S,
    then think how you gowing to do the planking,
    then try if the plank fits
    and only then gleu the plank on the model.
     
     
     
  9. Like
    Bob Cleek reacted to Baker in Buccaneer by ToniSk - OcCre - 1:100 - first build   
    For a first time planking, very good.
    But
    Take your time for the second planking, this will largely determine the appearance of your model later.
    Also take a look at your cannon ports, they don't all seem the same size on the picture
  10. Like
    Bob Cleek reacted to allanyed in Buccaneer by ToniSk - OcCre - 1:100 - first build   
    The article by David Antscherl on planking in the data base on planking explains lining off as well.    https://thenrg.org/resources/Documents/articles/APrimerOnPlanking.pdf
     
    To get any of the Passaro vids, just Google Chuck Passaro planking video part 1                or 2,,,, or 3,,,, or 4
     
    Allan
  11. Like
    Bob Cleek reacted to allanyed in Buccaneer by ToniSk - OcCre - 1:100 - first build   
    Toni,
    This may be off the wall, but would you consider setting your build aside and get some experience with high quality beginner models such as the 3 part series from Model Shipways designed by David Antscherl and/or the terrific Medway longboat kit by Chuck Passaro at Syren Ship Models.   You will learn how to properly plank as well as a lot of other things that will carry over to future more complex builds.  Just a thought that may prevent a lot of frustration.    
     
     If you would rather stay with the kit you already have, the suggestion above to study the planking tutorials as well as the four part You Tube series on proper planking is key.   https://www.youtube.com/watch?v=KCWooJ1o3cM
     
     
    Allan
  12. Like
    Bob Cleek reacted to ccoyle in Buccaneer by ToniSk - OcCre - 1:100 - first build   
    Try getting hold of a copy of Ship Modeling Simplified by Frank Mastini. It's often available in public libraries as well as being easy to find (and cheap) online. The book is a bit dated in some respects, but it's still a good introduction to the hobby.
  13. Like
    Bob Cleek reacted to Roger Pellett in SS Blagoev ex-Songa 1921 by Valeriy V - scale 1:100 - Soviet Union   
    There are active discussions that pop up every so often on the forum about showing treenails on wooden planked hulls and nails on copper sheathing.  Proponents seem to treat this more as a way to exhibit detailed craftsmanship than accurately replicating true to scale appearance.  More politely, it’s a modeling convention.
     
    Since there are far fewer of us modeling steel hulled vessels adding riveted detail gets less attention.  I personally choose not to do it for a number of reasons.  First, most steel hulled vessels are considerably larger than their commonly modeled wood sisters so are modeled at a smaller scale.  The common modeling scale for wood hulled vessels is 1:48.  My present project had a real life length of 240 ft.  At this scale the model would be 60” long; too long for in home display so I am modeling this at a scale of 1:96.  At this scale a 2” flattened rivet head is only about .02” in diameter; tiny.
     
    Many modelers look to the rivet detail on HO scale model railroads for inspiration.  These domed head rivets are “Snap Head” rivets formed with a die.  They were used to join relatively thin plating together.  Heavy ship hull plating requiring high high structural strength and watertight construction was joined with “PanHead” rivets.  The heavy Pan Head was usually located on the inside and the rivet’s Point was driven from the outside.  The outboard end of a properly driven rivet was nearly flush, and almost invisible at any reasonable scale viewing distance.
     
    Rivet patterns were determined by rules published by the various Classification Societies that graded vessels for insurance purposes.  They specified different patterns for various applications within the hull.  These were quite complex as they specified both the pattern and the number of rows of rivets.  Accurately modeling these therefore, requires a hull plating expansion drawing.  Just showing a single line of rivets in inaccurate and misleading.
     
    Roger
  14. Like
    Bob Cleek reacted to wmherbert in SS Blagoev ex-Songa 1921 by Valeriy V - scale 1:100 - Soviet Union   
    I have thought the same.  I owned a 88ft  1920 riveted hull schooner. From 100 feet rivets were not visible but overlap places were. So on the paddle wheel tug (1:48) I'm building I laid strip of auto pinstriping along hull and then painted over to give the feel of the plates.
    Bill

  15. Like
    Bob Cleek reacted to Valeriy V in SS Blagoev ex-Songa 1921 by Valeriy V - scale 1:100 - Soviet Union   
    Thanks Greg!
      It is these models made at the beginning of the last century that inspire me.  
  16. Like
    Bob Cleek reacted to Roger Pellett in SS Blagoev ex-Songa 1921 by Valeriy V - scale 1:100 - Soviet Union   
    Here in the US we call this stuff Bondo.  I have found it to be very durable.  I have a Navy Steam Cutter model that is 35 years old.  I made the cylindrical boiler by casting a blob using a pipe for a mold and then turning the casting on a lathe.  It is still as good as new.
     
    The only problem that I have encountered recently is that it sets up so quickly that it would be impossible to spread it carefully.
     
    Roger
  17. Like
    Bob Cleek reacted to Valeriy V in SS Blagoev ex-Songa 1921 by Valeriy V - scale 1:100 - Soviet Union   
    Yves, no need to worry!  
      This method has been tested in practice by more than a dozen ship modellers on floating ship models.  
  18. Like
    Bob Cleek reacted to ERS Rich in USS Maine by ERSRich - FINISHED - BlueJacket Shipcrafters - 3/32   
    Case Frame
     
    The case frame members are made of 1/2” square Cherry with grooves cut with the table saw.  Grooves are centered on the face of the member and 1/8” deep.  The posts and top pane frame members have two grooves.  The bottom members one.
     

     
    The bottom members have tenons cut to fit the groove.  The Burns saw is setup to cut the tenons.  Joints will be pin nailed.
     

     
    The post sits on the base top and is supported on two sides by the base moulding.  
     

     
    The top panel has mitre corners, that will be glued and supported with metal corner braces.  There is a cross piece across the middle.
     

     
    Here the frame is dry fitted.  Next is cutting the Lexan panes.  Happy Holidays!
     


     
     
  19. Like
    Bob Cleek reacted to archjofo in La Créole 1827 by archjofo - Scale 1/48 - French corvette   
    Hello,
    wish everyone here in the forum a .
    Completion: Equipping the fore topsail yard - footropes and stirrups / Marchepieds et étriers etc.
    By pulling in and tensioning the lanyard, the two halves of the jackstay were tensioned. The loose end of the ropge was carefully wrapped around the lanyard and tightened, as shown in various historical drawings.

     
    The footropes and stirrups for this yard were then made in the same way as for the main topsail yard, but with slightly reduced rope diameters.
    The following picture shows the already prepared stirrups. Thimbles are spliced into one end of them, through which the rope of the footrope will later be pulled. The other ends were formed with served eye splices, which are then lashed to the jackstay.

     
    The next picture shows the finished footropes with details.

     
    I continued with the lower blocks for clewlines l = 3.5 mm and the toggles to connect them to the topgallant sheets. As already mentioned, I made these from dogwood, a very hard and fine-grained wood, which is ideal for these small parts.

     
    The following picture shows the stropped blocks for the clewlines, one is connected to a sheet. Next to it is a block for the main braces for comparison.

     
    Here you can see the stropped blocks for the braces before they are placed on the yardarms.

     
    Here you can see how the studding sail booms are attached.

     
    The next pictures show the fore topsail yard equipped with the necessary elements for rigging. 

     
     
    Last but not least, a picture of the yards fitted out so far.
    Quite a jumble... 😊 

     
    We continue with the cross yard. 
    To be continued ... 
  20. Like
    Bob Cleek got a reaction from mtaylor in drilling hole through wire   
    You might want to check out Model Building with Brass by Ken Foran. Model Building with Brass book by Ken Foran (thriftbooks.com) This relatively new book contains a wealth of information on the subject.
     
    There are surely those with far more experience that I who will weigh in, so for what little it may be worth, if it is the "fork on a rod with a hole drilled in a thick spot just above the neck of the fork" in the diagram that you want to make, you might want to "do the math" first. While I can't tell from the drawing whether the hole is to be drilled through a "flattened" section of the rod or through a round sectioned "swelled" or "ball" section of the rod, either way, I don't think you can fabricate a 1.70 MM flat (or "ball") with a .50 MM (or slightly larger) hole on a length of 1.15 MM brass rod without adding material to the 1.15 MM rod stock. There doesn't seem to be enough "meat" there to work the available material do it.
     
    I don't know if you have a suitable lathe, which would make the task relatively easy, but even without a lathe, the task is possible, but will take more care and time. Simply put, the fork, neck, and "ball with a hole in it" is formed from square bar machinable brass and the 1.15 MM wire stock is silver-soldered into a hole in the end of the "ball with a hole in it. As the part looks like it's not the only one on the model, machining it as explained below makes the uniform fabrication of a number of the same part a lot easier "on an assembly line" basis. You can modify the following suggestion to suit the tools you have available if necessary. 
     
    1.)     Cut a section of solid machinable square brass bar stock of the exact square section size as the forks and as long as the distance between the open end of the fork and the "ball with a hole in it, plus a suitable length to permit drilling a tailstock center and parting off at the end of the "ball with a hole in it."  If the forks are not square in section, use square stock the same size as the widest dimension of the fork. If you can't find square bar stock exactly the size of the fork's (widest) outside dimension, use square bar stock of the least-oversized bar stock available. 
     
    2.)     Using machinist's "Prussian blue" or alcohol soluble permanent marker ink, carefully layout the placement of the two holes necessary the shape of the fork ends, the "notch" in the solid square bar to be removed to form the two sides of the fork, the shape of the ends of the fork sides, the "neck" of the fork, and the diameter of the "ball" section.  If you must use bar stock that is oversized and/or the fork is rectangular in section, layout the amount of waste to be removed to reduce the fork to the proper outside dimensions taking care that the amounts to be removed are equal on both sides of the stock retained in order to retain the concentricity of the forks, the "neck" and the "ball with a hole in it. Also mark the dead centers of each end of the section of bar stock.
     
    3.)      Preferably using a drill press or mill/drill (preferably with an x-y table) to ensure perpendicularity, drill two holes of the required diameter(s) entirely through the flat-sided solid bar stock in the appropriate locations, one to form the eyes of the fork and one to form the hole in the "rod." (These two holes are drilled parallel to each other through the centerline of the bar stock.) Carefully drill a suitably sized center hole in the "ball with a hole in it" end of the bar stock to accommodate the lathe tailstock center, which would preferably be a live center if one is available.
     
    4.)     Chuck the fork end of bar stock into the lathe headstock and mount the tailstock center into the other end of the bar. Turn the shapes of the fork shoulders, "neck" between the fork shoulders and the "ball with a hole in it," and the "ball" itself following the layout forming the "shoulders and neck" of the fork and the "ball" shape as per the layout and the detail of the part shape as you've laid it out. (The .50 MM hole will end up exactly in the middle of the "ball" section if your layout and drilling was accurate.) Turning the "ball" shape can be done using a file to shape it by eye (and template), by a custom half-round cutting tool, or a template and "duplicating" attachment on the lathe, or even a "ball turner" if one is available. However, the shape of the end of the ball where the hole will be drilled to insert the 1.15 MM wire must be decided first. If it is to have a "sharp" transition, the end of the ball can be perfectly round. If it is to appear to transition gradually to the diameter of the 1.15 MM wire, the curved transition will have to be formed when turning the ball. The completion of the forming of the end of the ball, however, is best done by parting off the surplus end of the bar and doing the shaping "in the open" free of the tailstock center. When the "ball with the hole in it has been parted, but the "bottom end" not completely turned, leaving the workpiece in the headstock chuck, place a tailstock chuck holding a 1.15 MM drill bit in the tailstock and, using the tailstock advance, drill through the center of the end of the ball end and through to hole in the ball. Then finish the turning of the ball end. If a curved shoulder transition between the ball and the 1.15 MM wire is desired, a short piece of the 1.15 MM wire can be inserted and the "shoulder" between the ball and the wire worked right up to the wire to turn a seamless transition. Note, however, that there isn't a lot of "meat" in the "ball" to hold the 1.15 MM wire. The larger you can make the "ball," the more space there will be for the 1.15 MM hole. By your measurements, there will only be .275 MM on either side of the 1.15 MM hole into the 1.70 MM ball. This won't matter once a good silver-soldered joint is making it all one piece, but the size of the hole will impact the appearance of the ball and you may have to do some drawing and planning of the shape of the ball so the appearance of a "swelled ball on a 1.15 MM shaft" is achieved. An experimental "dry run" on the wire to ball connection is probably indicated and it may be necessary to turn down the diameter of the 1.15 MM wire to provide a "peg" at the end to be soldered into a smaller hole in the "ball." +
     
    5.)       Remove the workpiece from the lathe. If the fork is smaller than the bar stock on two or four sides, carefully remove the excess material to yield the proper dimensions of the fork. This is a piece of cake if you have mill or even a drill press with an x-y table as it is light work.  Otherwise, a flat belt or disk sander or file should do the trick. With the dimensions of the fork established, shape the ends of the fork (simultaneously) using whatever tools are available. (They appear to be half-rounded.)
     
    6.)    After forming the ends of the fork sides, using a mill if you have one, or a jeweler's saw and files if you don't, remove the waste center of the solid bar to form the space between the two fork sides. This is tricky If not using a mill.  Using hand tools demands that care be taken to cut sufficiently "wide of the line" to permit accurate filing or using abrasive tape to ensure straight and perpendicular faces of the jaws on either side of the open space between them. The "slot" between the fork sides has to be accurately machined if the resulting fork is to look good. Accurate layout is essential. If the slot cannot be milled, a drill press (preferably with an accurate x-y table) can be used to drill a series of suitably sized holes through the square stock to remove most of the waste between the fork sides. Assuming the "waste removal" holes are accurately drilled, they can provide a valuable index for hand-shaping. The bulk of the waste can be roughly removed by sawing with a jeweler's saw to "connect the holes" and files can rough out the rest, taking care not to remove any material deeper than the edge of the drilled holes. Once "roughed out," machinist's "Prussian blue" or an alcohol-soluble permanent marker can be used to mark the faces of the exactly drilled "waste removal" holes. Thus marked, final shaping can be completed very accurately using the "bluing" to indicate the desired "flat" to be formed.
     
    7.)    Polish the part as required. Clean the part well as per standard silver-soldering procedure paying particular attention to the inside of the 1.15 MM hole in the end of the "ball with the hole in it. Insert a suitable length of 1.15 MM wire in the hole in the end of the ball to a depth which is not less than the inside edge of the drilled hole inside end of the 1.15 MM hole. This is essential to provide as much of a contact surface between the two parts as possible for the solder joint as discussed above. Silver-solder the two pieces together.  Using a drill and/or a round jeweler's file, remove the end portion of the 1.15 MM wire inside the hole in the "ball with a hole in it" so that the inside of the hole is smooth all around. Remove any excess solder from the face of the piece. The silver-solder joint on the face of the "ball" and inside the hole in the ball, should be invisible if you are better at it than I usually am.  
     
    As usual, it's easier done than said. Hope this helps.
  21. Like
    Bob Cleek reacted to allanyed in drilling hole through wire   
    A milling machine is the only way I have been able to do this kind of operation with a high degree of success.  If it is as small as yours I chuck the bit with about a mm protruding from the chuck so it will not flex.  If the hole needs to be deeper, I at least get the center mark where it should be then can bring the bit out further. 
     
    I love my Sherline, so a good choice based on my own experience, limited as it is. I know that you know, but for others that may not have had the experience, HIGH quality bits are a must.  
     
    Allan
  22. Like
    Bob Cleek got a reaction from barkeater in drilling hole through wire   
    You might want to check out Model Building with Brass by Ken Foran. Model Building with Brass book by Ken Foran (thriftbooks.com) This relatively new book contains a wealth of information on the subject.
     
    There are surely those with far more experience that I who will weigh in, so for what little it may be worth, if it is the "fork on a rod with a hole drilled in a thick spot just above the neck of the fork" in the diagram that you want to make, you might want to "do the math" first. While I can't tell from the drawing whether the hole is to be drilled through a "flattened" section of the rod or through a round sectioned "swelled" or "ball" section of the rod, either way, I don't think you can fabricate a 1.70 MM flat (or "ball") with a .50 MM (or slightly larger) hole on a length of 1.15 MM brass rod without adding material to the 1.15 MM rod stock. There doesn't seem to be enough "meat" there to work the available material do it.
     
    I don't know if you have a suitable lathe, which would make the task relatively easy, but even without a lathe, the task is possible, but will take more care and time. Simply put, the fork, neck, and "ball with a hole in it" is formed from square bar machinable brass and the 1.15 MM wire stock is silver-soldered into a hole in the end of the "ball with a hole in it. As the part looks like it's not the only one on the model, machining it as explained below makes the uniform fabrication of a number of the same part a lot easier "on an assembly line" basis. You can modify the following suggestion to suit the tools you have available if necessary. 
     
    1.)     Cut a section of solid machinable square brass bar stock of the exact square section size as the forks and as long as the distance between the open end of the fork and the "ball with a hole in it, plus a suitable length to permit drilling a tailstock center and parting off at the end of the "ball with a hole in it."  If the forks are not square in section, use square stock the same size as the widest dimension of the fork. If you can't find square bar stock exactly the size of the fork's (widest) outside dimension, use square bar stock of the least-oversized bar stock available. 
     
    2.)     Using machinist's "Prussian blue" or alcohol soluble permanent marker ink, carefully layout the placement of the two holes necessary the shape of the fork ends, the "notch" in the solid square bar to be removed to form the two sides of the fork, the shape of the ends of the fork sides, the "neck" of the fork, and the diameter of the "ball" section.  If you must use bar stock that is oversized and/or the fork is rectangular in section, layout the amount of waste to be removed to reduce the fork to the proper outside dimensions taking care that the amounts to be removed are equal on both sides of the stock retained in order to retain the concentricity of the forks, the "neck" and the "ball with a hole in it. Also mark the dead centers of each end of the section of bar stock.
     
    3.)      Preferably using a drill press or mill/drill (preferably with an x-y table) to ensure perpendicularity, drill two holes of the required diameter(s) entirely through the flat-sided solid bar stock in the appropriate locations, one to form the eyes of the fork and one to form the hole in the "rod." (These two holes are drilled parallel to each other through the centerline of the bar stock.) Carefully drill a suitably sized center hole in the "ball with a hole in it" end of the bar stock to accommodate the lathe tailstock center, which would preferably be a live center if one is available.
     
    4.)     Chuck the fork end of bar stock into the lathe headstock and mount the tailstock center into the other end of the bar. Turn the shapes of the fork shoulders, "neck" between the fork shoulders and the "ball with a hole in it," and the "ball" itself following the layout forming the "shoulders and neck" of the fork and the "ball" shape as per the layout and the detail of the part shape as you've laid it out. (The .50 MM hole will end up exactly in the middle of the "ball" section if your layout and drilling was accurate.) Turning the "ball" shape can be done using a file to shape it by eye (and template), by a custom half-round cutting tool, or a template and "duplicating" attachment on the lathe, or even a "ball turner" if one is available. However, the shape of the end of the ball where the hole will be drilled to insert the 1.15 MM wire must be decided first. If it is to have a "sharp" transition, the end of the ball can be perfectly round. If it is to appear to transition gradually to the diameter of the 1.15 MM wire, the curved transition will have to be formed when turning the ball. The completion of the forming of the end of the ball, however, is best done by parting off the surplus end of the bar and doing the shaping "in the open" free of the tailstock center. When the "ball with the hole in it has been parted, but the "bottom end" not completely turned, leaving the workpiece in the headstock chuck, place a tailstock chuck holding a 1.15 MM drill bit in the tailstock and, using the tailstock advance, drill through the center of the end of the ball end and through to hole in the ball. Then finish the turning of the ball end. If a curved shoulder transition between the ball and the 1.15 MM wire is desired, a short piece of the 1.15 MM wire can be inserted and the "shoulder" between the ball and the wire worked right up to the wire to turn a seamless transition. Note, however, that there isn't a lot of "meat" in the "ball" to hold the 1.15 MM wire. The larger you can make the "ball," the more space there will be for the 1.15 MM hole. By your measurements, there will only be .275 MM on either side of the 1.15 MM hole into the 1.70 MM ball. This won't matter once a good silver-soldered joint is making it all one piece, but the size of the hole will impact the appearance of the ball and you may have to do some drawing and planning of the shape of the ball so the appearance of a "swelled ball on a 1.15 MM shaft" is achieved. An experimental "dry run" on the wire to ball connection is probably indicated and it may be necessary to turn down the diameter of the 1.15 MM wire to provide a "peg" at the end to be soldered into a smaller hole in the "ball." +
     
    5.)       Remove the workpiece from the lathe. If the fork is smaller than the bar stock on two or four sides, carefully remove the excess material to yield the proper dimensions of the fork. This is a piece of cake if you have mill or even a drill press with an x-y table as it is light work.  Otherwise, a flat belt or disk sander or file should do the trick. With the dimensions of the fork established, shape the ends of the fork (simultaneously) using whatever tools are available. (They appear to be half-rounded.)
     
    6.)    After forming the ends of the fork sides, using a mill if you have one, or a jeweler's saw and files if you don't, remove the waste center of the solid bar to form the space between the two fork sides. This is tricky If not using a mill.  Using hand tools demands that care be taken to cut sufficiently "wide of the line" to permit accurate filing or using abrasive tape to ensure straight and perpendicular faces of the jaws on either side of the open space between them. The "slot" between the fork sides has to be accurately machined if the resulting fork is to look good. Accurate layout is essential. If the slot cannot be milled, a drill press (preferably with an accurate x-y table) can be used to drill a series of suitably sized holes through the square stock to remove most of the waste between the fork sides. Assuming the "waste removal" holes are accurately drilled, they can provide a valuable index for hand-shaping. The bulk of the waste can be roughly removed by sawing with a jeweler's saw to "connect the holes" and files can rough out the rest, taking care not to remove any material deeper than the edge of the drilled holes. Once "roughed out," machinist's "Prussian blue" or an alcohol-soluble permanent marker can be used to mark the faces of the exactly drilled "waste removal" holes. Thus marked, final shaping can be completed very accurately using the "bluing" to indicate the desired "flat" to be formed.
     
    7.)    Polish the part as required. Clean the part well as per standard silver-soldering procedure paying particular attention to the inside of the 1.15 MM hole in the end of the "ball with the hole in it. Insert a suitable length of 1.15 MM wire in the hole in the end of the ball to a depth which is not less than the inside edge of the drilled hole inside end of the 1.15 MM hole. This is essential to provide as much of a contact surface between the two parts as possible for the solder joint as discussed above. Silver-solder the two pieces together.  Using a drill and/or a round jeweler's file, remove the end portion of the 1.15 MM wire inside the hole in the "ball with a hole in it" so that the inside of the hole is smooth all around. Remove any excess solder from the face of the piece. The silver-solder joint on the face of the "ball" and inside the hole in the ball, should be invisible if you are better at it than I usually am.  
     
    As usual, it's easier done than said. Hope this helps.
  23. Like
    Bob Cleek reacted to druxey in drilling hole through wire   
    Presumably the wire is flattened first to widen it. Anneal to soften the metal, then centermark and drill.
  24. Laugh
    Bob Cleek got a reaction from BETAQDAVE in Split ring making process   
    You forget the last three ring making steps:
     
    Drop the completed ring on the floor.
    Spend fifteen minutes looking for it while talking dirty before giving up.
    Repeat.
  25. Like
    Bob Cleek reacted to Ferrus Manus in Le Soleil Royal by Bill97 - FINISHED - Heller - 1/100   
    Answering your questions is a hobby in and of itself! Your questions are always welcome. 
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