Tonnage for crank press ?

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fred
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Tonnage for crank press ?

Post by fred » Wed Feb 07, 2018 9:21 pm

I have been offered a press i believe 12 ton , off the top of my head i think the last time i read ,a press of about 16 ton capacity is good for crank rebuilds , i have a crank given to me by Tad ,it looks like it has been in the irish sea a little ,so nothing to lose .and help or info would be greatly received ,i hope everyone's well.cheers fred

Professor
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Re: Tonnage for crank press ?

Post by Professor » Tue Feb 20, 2018 11:27 pm

A 5 to 10 ton press is just about adequate for most 2 stroke cranks if you have a good square hold. the more powerful the press the more control over pressing it back together you should have for position.

The KR1S crank wants a few specific shaped plates to help press it apart without damaging it

Some four stroke cranks can be much tighter
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Gerrit
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Re: Tonnage for crank press ?

Post by Gerrit » Wed Feb 21, 2018 12:04 pm

Kevin Cameron once mentioned a figure of 7 tons for Yamaha TZ250/350/750 press fits, the KR-1(S) crank shouldn't be very much different.
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fred
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Re: Tonnage for crank press ?

Post by fred » Wed Feb 28, 2018 6:36 pm

cheers guys this is realy good info ,

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