19-06-20, 06:35 PM
[quote author=slappy link=topic=26267.msg316636#msg316636 date=1592587456
Any kind of grease can affect torque values. I work on final assembly of offshore oil and gas trees, we regularly torque in excess off 600 ft lbs and we use a specialist grease on the threads. The torque values are calculated with this grease on as it does differ from a dry thread and at these high values it means the seal, which could have to cope with massive working pressures, will leak and when the tree is sat on the bottom of the ocean that could be catastrophic.
Get real fella and in your application these are specially cut threads to take that kind of pressure and are effectively blind holes working under extreme pressure, i.e. 600ftlbs of course grease isn't going to compress :rolleyes This is a bolt on a motorbike :rolleyes
Any kind of grease can affect torque values. I work on final assembly of offshore oil and gas trees, we regularly torque in excess off 600 ft lbs and we use a specialist grease on the threads. The torque values are calculated with this grease on as it does differ from a dry thread and at these high values it means the seal, which could have to cope with massive working pressures, will leak and when the tree is sat on the bottom of the ocean that could be catastrophic.
Get real fella and in your application these are specially cut threads to take that kind of pressure and are effectively blind holes working under extreme pressure, i.e. 600ftlbs of course grease isn't going to compress :rolleyes This is a bolt on a motorbike :rolleyes
Later