Someone asked for the dimensions for this tool a few days back. I couldn't find the old thread so I thought I would make a new thread with the same photo.
The tool is made from a 2" length of 3/16" mild steel. I used a big nail. The hole in the end is 1/16". The clearance slot is made with a .O30" cut-off wheel using any kind of high speed rotary tool. The depth is to within . 025" of the inner hole. It has to be this close on most modern clocks. Both the hole and clearance slot go in about 3/8".
Note, You might as well make a larger one too. Start with the same stock. The only difference is the center hole will be 3/32" and the you may not even need the clearance slot. If needed it won't need to be very deep. This one will fit older/larger movements but you might not use it to much because many older movement have loose GPs.
I can't over emphasize the importance of using very little pressure to seat these disc and always look for scars and dents when you're puting them on a round shaft. These scars need to line up. When lined up the disc will usually drop right into place. Gather on, Willie X
The tool is made from a 2" length of 3/16" mild steel. I used a big nail. The hole in the end is 1/16". The clearance slot is made with a .O30" cut-off wheel using any kind of high speed rotary tool. The depth is to within . 025" of the inner hole. It has to be this close on most modern clocks. Both the hole and clearance slot go in about 3/8".
Note, You might as well make a larger one too. Start with the same stock. The only difference is the center hole will be 3/32" and the you may not even need the clearance slot. If needed it won't need to be very deep. This one will fit older/larger movements but you might not use it to much because many older movement have loose GPs.
I can't over emphasize the importance of using very little pressure to seat these disc and always look for scars and dents when you're puting them on a round shaft. These scars need to line up. When lined up the disc will usually drop right into place. Gather on, Willie X