Machining slender crankshafts

This topic has 3 replies, 3 voices, and was last updated 31 March 2014 at 18:55 by Steve Withnell.

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30 March 2014 at 22:44 #148502
Bob Rodgerson
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@bobrodgerson97362
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.
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30 March 2014 at 22:44 #30485
Bob Rodgerson
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@bobrodgerson97362
How to reduce deflection while machining the journals of long slender crankshafts
31 March 2014 at 08:47 #148511
Michael Gilligan
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@michaelgilligan61133
Neat idea, Bob

Thanks

MichaelG.
31 March 2014 at 18:55 #148555
Steve Withnell
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@stevewithnell34426
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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Machining slender crankshafts

Machining slender crankshafts

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