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A. It is a roller set for R60 and R110 tools, designed to reform unified threads with a 9 threads per inch pitch.
A. They should choose it when repairing very coarse unified threads of 9 tpi pitch on large threaded sections.
A. The rollers are fitted into the head following the pattern for 9 tpi unified threads specified in the pitch chart.
A. The very coarse pitch demands rollers specially shaped to the wide thread spacing and depth to reform the thread correctly.
A. The set is supplied in a pack roughly 50 x 50 x 50 mm, suitable for labelled storage.
A. Yes, as long as the threads are 9 tpi unified and within the diameter limits of the thread reform tool.
A. They should measure with a tpi gauge, confirm 9 tpi and verify the thread form corresponds to unified standards.
A. It allows coarse unified threads to be restored, saving the cost and downtime associated with replacing large threaded components.
A. Clean them thoroughly, apply light oil to prevent rust and store in their designated unified roller container.
A. Yes, wherever 9 tpi unified threads exist and the R60 or R110 tools can be safely used."
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