crankshaft regrind

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philip
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crankshaft regrind

Post by philip » Fri May 31, 2019 7:54 am

finally starting my engine project i am taking my ee crank to be ground. the shop says they will do it however i want it.
i have checked the crank it is straight and measures within .005 of stock. i am going to tell them just clean it up no more than needed
and radius the corners .125 i am also going to see if they can check and tru the flange faces. oh and magnaflux am i missing anything?
philip


kerry
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Re: crankshaft regrind

Post by kerry » Fri May 31, 2019 8:08 am

Crack test first, and as for clean up as needed that's fine as long as you work with what rod sizes are available or you will be looking for someone to build rods for odd size.


Topic author
philip
Posts: 81
Joined: Sun Jan 06, 2019 12:09 pm
First Name: Philip
Last Name: Thompson
Location: Graham nc

Re: crankshaft regrind

Post by philip » Fri May 31, 2019 8:14 am

i am going to do the babbitt work and yes i am going to ask him to make the rod journals the same most of the wear is on the rear main. philip


kerry
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Re: crankshaft regrind

Post by kerry » Fri May 31, 2019 8:34 am

Sounds like a plan, my crank grinder does in .005" increments and often end up with inbetween size journals, no problem as
I do my own rod work.

I
rod machine 003.JPG


Topic author
philip
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Location: Graham nc

Re: crankshaft regrind

Post by philip » Fri May 31, 2019 9:03 am

nice rod lathe. i will be using a bridgeport and a fixture i made. philip


Adam
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Re: crankshaft regrind

Post by Adam » Fri May 31, 2019 10:00 am

If the 3rd main on an ee crank is already .011” or more undersize, it likely will not re-grind .020” or better. They generally wear the most at the 3rd main and all the wear is generally to one side, not evenly worn all the way around.

The AA cranks seem to be more resistant to wear, but more prone to cracking. The EE cranks seem to be less prone to cracking, but also less resistant to wear. The AA steel is vanadium steel. The EE steel is high-carbon steel.


rgould1910
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Re: crankshaft regrind

Post by rgould1910 » Fri May 31, 2019 3:26 pm

Find a grinder who indexes off the OD of the flange. Most can't or won't. A few posts on this issue.


Topic author
philip
Posts: 81
Joined: Sun Jan 06, 2019 12:09 pm
First Name: Philip
Last Name: Thompson
Location: Graham nc

Re: crankshaft regrind

Post by philip » Sat Jun 01, 2019 10:58 am

Took the crank yesterday they said they would do it anyway I wanted so we wrote a recipe
it's a big truck repair shop with full machine shop
Nice people quote on the grind 75.00 plus
The cost of magnaflux. I also took the block
To be cleaned in an oven. Philip


Aarongriffey
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Re: crankshaft regrind

Post by Aarongriffey » Sat Jun 01, 2019 11:58 am

Good idea to do five rods to have an extra one under the rear seat for just in case.

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