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A. It is a roller set for R60 and R110 tools, designed for British threads with 9 threads per inch pitch.
A. They select it when repairing very coarse British threads with 9 tpi pitch on large fittings or shafts.
A. The rollers are fitted according to the pitch chart for 9 tpi British threads supplied by Sykes Pickavant.
A. The extreme coarseness and deep thread profile require rollers tailored to this spacing to correctly reform threads.
A. It is supplied in a compact pack about 50 x 50 x 50 mm, labelled with pitch and British thread series.
A. Yes, as long as the threads are 9 tpi and fall within the R60 or R110 tool’s diameter capabilities.
A. Measure with a tpi gauge, confirm 9 tpi and check the profile against British thread standards used in the application.
A. It restores very coarse threads on expensive components, often avoiding replacement and reducing downtime.
A. Clean thoroughly, apply light oil and store them with other British series roller sets in labelled compartments.
A. Yes, wherever 9 tpi BSW, BSF, BSPP or BS threads require non-cutting restoration within tool limits."
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