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Machining slender crankshafts

How to reduce deflection while machining the journals of long slender crankshafts

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Bob Rodgerson	30/03/2014 22:44:55
612 forum posts 174 photos	A long time back I machined the crankshaft for a 360 cc flat six. In order to minimise deflection and chatter while machining the various journals I filled the gaps between the webs of previously machined journals with polyester resin by masking off most of the gap and leaving just a small hole through which the resin is poured. When finished drop the crank into a tank of Acetone to dissolve the resin.
Michael Gilligan	31/03/2014 08:47:53
23121 forum posts 1360 photos	Neat idea, Bob Thanks MichaelG.
Steve Withnell	31/03/2014 18:55:41
858 forum posts 215 photos	For the crank for the Whittle V8, I made some slotted tubes to slip over the crank and used jubilee clips to tighten them up. Like this: LINK Steve

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