30-06-2019, 10:04 AM
The only crude part is the use of a drill with wobbly chuck but even a coarse wobbly grinding wheel sparked out will give an accurate fine finish. A few strokes on a very fine oilstone leaves a very fine finish. (I used to finish flat Javelin followers that way and they wrang together like toolmaker gauge blocks.)The radius is not critical. The relation of the centre to the sides is reasonably so but can be checked by rotating half a turn and checking the height of each flank from the lathe bed. It is the end result which matters, not the method.
(Toolmakers blocks are so flat that when placed together air is excluded and become hard to separate)
The method of regrinding camshaft does border on the Heath Robinson but it was notably effective until the crank folded it!
(Toolmakers blocks are so flat that when placed together air is excluded and become hard to separate)
The method of regrinding camshaft does border on the Heath Robinson but it was notably effective until the crank folded it!