Crankshaftt

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Mel King
Posts: 69
Joined: Thu Jan 10, 2019 12:23 pm
First Name: Melvin
Last Name: King
Location: Portsmouth VA

Crankshaftt

Post by Mel King » Tue Feb 12, 2019 6:43 pm

I installed the crank I had ground in 1980 and come to find out it is .003 out in center main and the inner thrust is .007 on one side and drags on the other but the flange is square. :oops: It is fresh .020 all. Any help ?,I live in Portsmouth ,VA. I have 2 other cranks I think are junk but I hate to throw them away. One is .005 on front main and .030 on rear . The other is .015 front and .025 rear. Any ideas? I"m at a stand still!! :roll: :roll: MEL.

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Mark Gregush
Posts: 1540
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
Location: Portland Or
Board Member Since: 1999

Re: Crankshaftt

Post by Mark Gregush » Tue Feb 12, 2019 6:52 pm

Have the crank check for straightness, built up the rear thrust and refit for correct end play.
I know the voices aren't real but damn they have some good ideas! :roll:

1921 Huckster
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Kevin Pharis
Posts: 188
Joined: Thu Jan 10, 2019 3:54 pm
First Name: Kevin
Last Name: Pharis
Location: Sacramento CA

Re: Crankshaftt

Post by Kevin Pharis » Tue Feb 12, 2019 7:57 pm

Having been ground near 40 years ago I see a couple possibilities. 1) a crank not stored properly can sag under its own weight over time. 2) Or it was ground wrong in the first place. It is widely known that crank grinders hold the crank between centers (using axial pressure) and this will spring the crank, after grinding it will resume its original shape and appear bent


Topic author
Mel King
Posts: 69
Joined: Thu Jan 10, 2019 12:23 pm
First Name: Melvin
Last Name: King
Location: Portsmouth VA

Re: Crankshaftt

Post by Mel King » Wed Feb 20, 2019 6:47 pm

Who is able to straighten a T crank close to Portsmouth ,VA? MEL.

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