Thread: punch source
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wws
 
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wrote:
I have made a number of punches and chisels out of old automotive
valves.
Not near long enough for your criteria. Mcpherson struts have nice
shafts, but like printers, the shafts are not very hard. How about
forging from coil springs?


Dan

Wouldn't I be going around in circles?

Heat treating would warp any long thin shaft.
I suppose it could be centerless ground afterward, but now I'm looking
for a helicopter or stealth aircraft part with a lifetime measured in hours.