Improvement of sand column machine gasket

[Bitao]

I have two sand bar machines for grinding curves. However, there is a common problem: The gasket uneven caused when grinding the end of the workpiece can not ensure that vertical. In particular, smaller parts are more prominent; and the spacer between the gasket and the sand column is often too large to cause small parts often involved. So the use of their own aluminum and brass turning, to ensure that the deviation control in the minimum range.