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- Feb 24, 2010
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Not sure where to place this one but as it’s a project on my 80 I thought I’d post it here.
I am in the process of fitting a larger gearbox oilcooler and the fittings are 1/2 NPT.
When screwing the fitting into the cooler it only goes in by about 2 threads by hand, I have then tightened it a further 1/2 a turn to king up the 90 degree elbow to where I want it to be positioned, this final half a turn seemed to make it quite tight.
Having now read this http://www.entegrisfluidhandling.com/Product.aspx?G=1054 it seems I should be tightening the fitting by a further 4 turns past hand tight. Obviously I don’t want to strip the thread in the cooler or fitting by over tightening it.
I realise NPT is a taper thread but how much force can it take before before it ends in disaster?
I am in the process of fitting a larger gearbox oilcooler and the fittings are 1/2 NPT.
When screwing the fitting into the cooler it only goes in by about 2 threads by hand, I have then tightened it a further 1/2 a turn to king up the 90 degree elbow to where I want it to be positioned, this final half a turn seemed to make it quite tight.
Having now read this http://www.entegrisfluidhandling.com/Product.aspx?G=1054 it seems I should be tightening the fitting by a further 4 turns past hand tight. Obviously I don’t want to strip the thread in the cooler or fitting by over tightening it.
I realise NPT is a taper thread but how much force can it take before before it ends in disaster?