MachineryHouse C6246, Инструкция по эксплуатации

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2) To use Metric lead screw in processing Metric Threads
Use 11T worm gear to cut 2.75and 5.5, but if you wish to repeatedly use Half Nut,
it requires to steady it on an original fix scale. For instant, the original point shows
scale 1 in index disc when next clutching you must be start it when it also indicates
scale 1 for not to damage the threads. Same story, if it is on scale 5, you should also
have it on scale 5 in next coming clutching.
Use 14T worm gear for cutting 0.5 and 0.75 and when you repeatedly use Half Nut
you don’t have to fit it on certain scale. It can be done without any damage on threads
in any scales of index disc.
Page 24 Instructions Manual for CL-60A (L604) 07/09/2017