Not to be confused (as I did in earlier post) to the Geometric Die Heads. After much digging around I have found tons of Geometric Die Heads, a few odd brands but nothing like the GTD one pictured below.
This GTD version seems to be adjustable over a particular range of diameters. The markings on the chasers (the only ones with it) say 18 18. Typical Type D chasers are specific to diameter and tpi – say 5/16-18 for instance. This GTD version is marked 1/2″ so basically the 18 18 chasers would be useful for 5/16-18 and not much else I am afraid.
The D type chasers are available, yet to find the J Hook looking ones that are used in the GTD Model.
Greenfield Tap and Die
18 18 TPI Denotion
Side view of Chaser
Other Side of Chaser – smooth, not slots, no chance that type Ds would fit.
18 TPI on 1/4″ Aluminum
Note knurled collar, allow the for the adjustment of range of stock diameters
In deep now. Have the doors off the base, all sides initially stripped. Probably won’t strip inards not the actual lathe unit as I don’t want to tear it down at this point. More prep to do but making progress.
Wanted to free up spindle nose for shits and giggles. Basically a proprietary Rivett L00.
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