What grit emery to polish the stock crank??

[BetMinesFaster]

Hey guys, due to a budget shortfall I have chosen to rering and bearing my 109 and collect the parts over the summer to do it how I want......Im curious what grit emery to polish the crankshaft with?? Thanks for the help, Ryan

 

[scottk]

i used scotch brite!

 

[cchilly]

How do you plan on polishing it? Are you really using emery paper or just call it that? Most people that polish cranks use film now.

Either way I would start with the finest possible to get the scratches out and then work your way finer in size. Use WD40 or something like that for lube.

For emery I would start with Grit 0 or 2/0 and see how it takes out the scratches. Then proceed finer until you finish with 4/0.

For film I would start with a 30 micron grit (500 grit). I would then proceed finer until you finish with a 3 or 5 micron grit (3000+ grit).

Good luck

Chris

 

[gnxtc2]

I would bring the crank to a machine shop and have them check it out. And let them polish it for you.

Billy T.
gnxtc2@aol.com

 

[BEATAV8]

Special stuff. It's called crank paper.

 

[chasmat2316]

I would bring the crank to a machine shop and have them check it out. And let them polish it for you.

Billy T.
gnxtc2@aol.com

x2!

 

[Alky V6]

Let the machine shop do it. Too difficult to get an even pressure across the journal by hand, even with a lathe. Don't over polish it!