Can anybody throw light ,on which instrument can be used to ,measure coefficient of friction ,between two threaded connection,when an antiseize compound is applied between two mating surfaces.
Original Post
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Dear Sir,
Can you please confirm what is the relevance of co-efficient of friction in anti-seize compound?
As per best of my knowledge user more concern about tightening & opening torque.
Can you please confirm what is the relevance of co-efficient of friction in anti-seize compound?
As per best of my knowledge user more concern about tightening & opening torque.
coefficient of friction of an antisieze compound is important,since lower the value ,lesser torque is required to get the same tightening or clamping force.
Hi Ajay
As lubtech was saying,
Anti Seize compounds do not usually have a low coefficient of friction,
we have seen instances of stiction in heavily loaded pin and bush situations where No Seize was applied instead of the correct lubricant,
If you wish to check the difference in friction when tightening important hold down bolts the bolt should be measured for correct extension when tightened and the tightening torque recorded,
if you don't measure the extension of the bolt it could undertightened or pulled in half as we have seen with some of the new super lubes being used as thread lubricants.
regards
Rob S
www.rttech.com.au
As lubtech was saying,
Anti Seize compounds do not usually have a low coefficient of friction,
we have seen instances of stiction in heavily loaded pin and bush situations where No Seize was applied instead of the correct lubricant,
If you wish to check the difference in friction when tightening important hold down bolts the bolt should be measured for correct extension when tightened and the tightening torque recorded,
if you don't measure the extension of the bolt it could undertightened or pulled in half as we have seen with some of the new super lubes being used as thread lubricants.
regards
Rob S
www.rttech.com.au
Hi Allan,
I think if I can measure the bolt elongation ,thereby determine the clamping force with the same torque,using different antiseize compounds,it may serve my purpose.could you please help me with the website of the company manufacturing Bidwell Boltguage.
I think if I can measure the bolt elongation ,thereby determine the clamping force with the same torque,using different antiseize compounds,it may serve my purpose.could you please help me with the website of the company manufacturing Bidwell Boltguage.
Dear AJS,
Sorry for delayed reply to this blog. Considering your question my feeling says you are relating this question with thread dope compound & not nut bolt applications. If I am right I can give you testing rig as per API norms where you can check co-efficient of friction of pipe dope compound.
Please feel free to call me on 9867535930.
Lubetech
Sorry for delayed reply to this blog. Considering your question my feeling says you are relating this question with thread dope compound & not nut bolt applications. If I am right I can give you testing rig as per API norms where you can check co-efficient of friction of pipe dope compound.
Please feel free to call me on 9867535930.
Lubetech
