Thread: Delrin drive nut (lee)
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14-10-2009 #29
put a 4" length of trap rod in a drill chuck or lathe. Spin it up and apply a file to the last inch to taper it to the thread depth. Lock the chuck or hold rod in vice) and grind 3 'slots' at 120deg for 3" using a thin cutting disc (or file it if you feel up to it). lastly file the untapered end to a square.
Good enough for delrin. For a tigher finish lightly file the overall thread by about 0.05 - 0.1mm
I did it and it works... for nylon or acetal a few times... but wont do brass without hardening...
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