dan8400
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| posted on 7/6/10 at 10:32 AM |
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Max torque for 8.8 m8 bolt
Morning guys,
As title really. Sheared one off so i'm going to use a scientific approach (torque wrench) instead of "Dan tight" 
Thanks
Dan
Hey - That's Journey!!!
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r1_pete
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| posted on 7/6/10 at 10:53 AM |
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A usefull table here.
Just a guide as it depends also on what is being clamped, you wouldnt torque a pressed sump with a cork gasket up as tight as you would a propshaft
flange bolt....
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BenB
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| posted on 7/6/10 at 05:56 PM |
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quote:
Originally posted by r1_pete
A usefull table here.
Just a guide as it depends also on what is being clamped, you wouldnt torque a pressed sump with a cork gasket up as tight as you would a propshaft
flange bolt....
True- but you could he's talking about max torque before it breaks... Nice linky though...
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PuppiesBalls
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| posted on 7/6/10 at 06:23 PM |
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Next time your doing a bolt up FT, something to bear in mind is that 80% of the force put into tightening a bolt is used just to overcome the friction
on the threads, so put a drop of oil on the thread & you can get the bolt alot tighter than you ever could if you are bolting up with out oil.
what I mean is that if you put say 10 ftpound of torque into tightening a bolt the bolt will be clamping the objects alot harder if its 10 lubricated
ft pound torque. hope thats clear 
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Mix
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| posted on 8/6/10 at 03:54 PM |
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Hi
Fasteners are designed to be torque loaded within design specs - to lube a fastener which is designed to be 'dry torqued' will induce
excessive loadings into that fastener which may result in premature failure, to not lube a fastener which is intended to be lubed will probably result
in an undertorque situation - always use the manufacturer's recommended procedure when torquing joints.
Regards Mick
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