THREAD CUTTING ATTACHMENT FOR LATHES

摘要

A thread cutting attachment for lathes mounted in the conventional tool holder carried by the longitudinal carriage of the lathe. The attachment includes a rotary cutter driven by an electric motor having a variable speed in a range of from 50 to 10,000 RPM. The attachment is adjustable about a horizontal pivot extending perpendicularly to the axis of the cutter so that the line of cut may be aligned with the pitch of the thread. Both internal and external threads are cut with the attachment by using the thread pitch drive on the lathe carriage.