I/C crank pins & journals

[ScottParticipant @scott]

Hello all

Just wondering if anyone has any tips for getting a good finish on crank pins and journals for I/C engines?

Thanks

Scott

[ScottParticipant @scott]

What’s the best way to finish them?

[JasonBModerator @jasonb]

Fine Emery cloth or wet n dry on a flat stick will give that final finish and take them down to size. Cover the lathe up well, I tend to lay a piece of board or card on the bed so there is no risk of things getting caught in the chuck.

[Bill PudneyParticipant @billpudney37759]

Or press in a needle roller……

cheers

Bill

[ScottParticipant @scott]

Thanks chaps!

[ScottParticipant @scott]

Just a quickie Jason – what grit would you go down to?

Cheers

Scott

[JasonBModerator @jasonb]

about 600g W&D if they are running agains a metal bearing ec aluminium conrod with or without bronze bearing, bit less say 400g if using ballraces.

J

[Author]

Posts