M47 crankshaft question

[fresh_TD]

An automotive machine shop could easily modify the crank, but might not have a mill to do the sprocket. Hence why people might have gone the crank route.

The local machine shop I'm using can mill the sprocket . But doesn't have the ability to mill the crank.

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[nando]

I have no horse in this race, but if it were me - I would machine down the crank, rather than the gear. it might be easier to machine down the gear, but there's already a minimal amount of material there, I wouldn't want to weaken it.

[TobyB]

...but for me, with a Bridgeport and a boring head, opening up the sprocket and pulley's easy,
whereas grinding down the crank nose is very much not.

My vote- try boring out the sprocket. What's the worst that can happen???

heh

horseless, too.

t