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A. It is a roller set for R60 and R110 tools, configured for British thread forms at 19 threads per inch.
A. They use it to repair external BSW, BSF, BSPP or BS threads with a 19 tpi pitch on shafts or fittings.
A. The rollers are fitted into the tool head according to the layout specified for 19 tpi British thread forms.
A. British threads have distinctive angles and spacing, so correct rollers are needed to accurately reshape threads without damage.
A. The set is supplied in a compact pack about 50 x 50 x 50 mm for simple storage and identification.
A. Yes, provided the diameter is within the R60 or R110 capacity and the thread type is appropriate.
A. Use a tpi gauge, check that the profile matches the relevant British series and then choose this roller set.
A. It can restore external British threads without cutting new ones, helping fittings seal and tighten correctly again.
A. Clean them, lightly oil all surfaces and store in their labelled British series container.
A. Yes, wherever suitable 19 tpi BSW, BSF, BSPP or BS threads require non-cutting restoration."
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