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[Roadracer_Al]

I keep thinking I need the full set of Silver & Demming drills. A friend has found and purchased 2 full sets at shop closings, and doesn't want to get off of one of the sets. I don't suppose I can blame him.

The spanner wrench for the collet chucks is dead easy to make.
Measure the OD of the collet locking ring.
Measure the ID of the collet lock ring pin hole.
Turn the pin out of a piece of 4140 or other hardening steel -- for the length of the pin, make it the depth of the pin hole, plus about 3/8".
Begin the layout by scribing the diameter of the OD of the lock ring on a piece of 1/4" steel. You can make the handle long or short -- mine is about 3" and I use it like a slugging wrench.
The handle can engage the OD of the locking ring between 90° and 120°, DO NOT make it 180° because you simply can't get the pin into the locking ring.
Lay out accordingly. Mark a radial line on the handle, then offset it by the radius of the pin (so the pin winds up on center)
Bore the hole in the 1/4" either with a boring bar holder in the mill, or in the lathe on a faceplate.
Cut out and finish the rest of the handle.
Braze the pin onto the handle, then quench. The pin will be full-hard, so it must be annealed - I'd pop it in the toaster oven @ 400 for 1 hour.

Enjoy!

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