I/C crank pins & journals

I/C crank pins & journals

This topic has 6 replies, 3 voices, and was last updated 10 September 2014 at 20:03 by JasonB.

Viewing 7 posts - 1 through 7 (of 7 total)

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3 September 2014 at 09:18 #162536
Scott
Participant
@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
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3 September 2014 at 09:18 #2416
Scott
Participant
@scott
What’s the best way to finish them?
3 September 2014 at 11:14 #162556
JasonB
Moderator
@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.
3 September 2014 at 13:12 #162567
Bill Pudney
Participant
@billpudney37759
Or press in a needle roller……

cheers

Bill
5 September 2014 at 14:16 #162740
Scott
Participant
@scott
Thanks chaps!
10 September 2014 at 19:56 #163303
Scott
Participant
@scott
Just a quickie Jason – what grit would you go down to?

Cheers

Scott
10 September 2014 at 20:03 #163305
JasonB
Moderator
@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
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