Junk Yard Find

[Hawkeye]

Today, I made the missing register pins for zeroing the measuring pin when setting up the height of the diamond point. Some careful measuring lead to a wild 'educated' guess as to what diameter they should be. I ended up using 1/2" O1 drill rod. It all seemed to work out accurately. all this for a tool I won't have a use for until a surface grinder falls into my lap.

   

For those who haven't had any contact with one of these (like me until this weekend), the horizontal pin traps the sliding body between the two register pins while you set the diamond point to the centre line of the tool. After that, you can loosen the lock setscrew (the centre one above the body that holds the diamond point). Then, if you slide the measuring pin to the right until it clears the left-hand register, you can slide the dovetail down and place gauge blocks between the right-hand register and the measuring pin to lock the point a measured distance from centre to dress a grinding wheel to a convex profile.

By sliding the pin to the left and moving the body up, you can set the point to shape the grinder to a concave profile.