Acceptable driveline runout

[Sparkplug]

I've made a few shafts. New splines. Not cut and welded. Our runout stays stock. Within .010

It's been brought to.my attention that cut and welded shafts purchased on this site have .125 or more. And multiple people have been told .250 would be acceptable.

I'm just curious if other people believe this. Or what other people believe is acceptable runout for a shaft that spins 7k Rpm

It's totally possible to straighten a cut and welded shaft to within .010. You just have to take the time with a press and lathe is all.

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[zzylstra]

I have noticed many shafts from various manufactures have crazy run-out. I do not think it is acceptable to have any at the rpm's we are turning. My H20 shaft looked to have very minimal runout although I didnt mic' it. The few Maxx/Skat/Thrust shafts I have worked with had too much for comfort.

 

[TheBuzzard]

I had a shaft cut and welded and it was crookeder than I would have liked but I was in a hurry and said F it. I never noticed a thing behind my XS1200 and that was last year. I don't think it makes much if any difference if its perfect. a bent shaft will make the midshaft and coupler wobble in the housing. ive seen that behind a WDK1200 some years ago. I did hit a rock that grenaded the bottom of the ski and I don't know if it was bent before or after the crash. it was a maxx shaft. there are a couple hillbillys around here that cut and weld shafts and use them and they aint no machinists

 

[augustaf]

They're certainly easy to straighten. Just stick the thick part into your Monarch or Leblond, center the bearing area and slip a pipe over the shaft and bend away.