We're trying to run a lead free brass becaue of fear of changing laws and having a hard time cutting an internal 1/2 npt thread without tearing the threads. We trided rolling the thread but a thin wall [about 0.050] keeps breaking. We run all Acmes and cycle time is'nt an issue, we are going to try a tin coated tap with a 15 degree hook, any other ideas?
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2745 alloy brass
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Posted 3 years ago #
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Try using an interrupted tap which will reduce the torque. That brass is a bear and highly abrasive.
Posted 3 years ago #
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