How to seperate a crankshaft

[Cotton eyed Joe]

I got a twisted crank sitting at the shop, and I've wanted to seperate it for 2 years now just to see how its built and put together.

 

Anyone have any idea where to start on it??

 

I can build tooling if thats what it takes. I really don't want to take it to a shop to have them seperate a junk crank for no particular reason.

 

And, I don't want to demolish it by heating it or sticking it in the press if thats not whats called for.

[it's stolen]

I dont know if you need to heat it but the crank is assembled with a press.

[420 RACING]

From what I have heard you need a serious press like a 20-40 ton press, don't mark my word but thats what comes to mind.

 

Just my .02

[wayfst]

20 ton press is big enough. get a bearing seperator your good to go.

[racer]

you need to take it to a machine shop.

 

is it welded at all? cause that could produce some problems. but i think that biggest issue is putting it back together and getting it to run true.

[Cotton eyed Joe]

you need to take it to a machine shop. 

 

is it welded at all?  cause that could produce some problems.  but i think that biggest issue is putting it back together and getting it to run true.

402321[/snapback]

Cool. I'll find a good machine shop that can take ......

 

I got a 50 ton air over hydraulic press. I was wondering if thats all that holds them together.

 

And yes...looking at it...How in the fuck do they get them back together and running out without keyways?

There what? 5-6 total pieces?

Each end can be billet, the middle has to have the counter weights pressed on from what I can see. So thats a total of (not including the journal pins) 5 pieces.

 

I know I could make one with captured keyways. That would make lining it up a breeze. We do shit like that for various food processing plants around here.

 

I'll have to take a look at it as soon as I get sick of working on my drag bike.