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

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....

quote:

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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....

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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

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