After machining the blank to 10mm shank with 3mm wide by 14mm diameter I re-chucked it and drilled 5 equally spaced holes.
I don't know what the imperial lathes have but my metric lathe has a 40 tooth spindle gear. I used a piece of wire to point at the tooth. I marked every 8th tooth.
A small jack was a very effective spindle lock, suprisingly I didn't have to tighten very hard to achieve the desired result.
General view of arrangement.
Starting to gullet out.
Finished gulleting and back relieving. The whole gulleting process took 1/2 hour and I wasn't going like the clappers. Cutting rake is just done by eye, nothing fancy.
Here is a really high tech heating chamber with a propane heating torch.
The mild steel pot containing the now cold case hardening compound "Hardite" which has 20% Barium salts in it. I hung the business end of the cutter in the red hot salts for about 10 minutes then quenched in water. I then lightly stoned the cutting teeth and used it as is, ie I didn't worry about annealing(temper) it back a little. The little cutter performed extremely well and only one tooth got a slight chip in it. I may get around to tempering the "glass hard" teeth back somewhat to a more suitable hardness.
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