3 double start internal acme thread I made on a manual lathe. For the shops old Stanko boring mill I run : r/Machinists
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Milling machine – making threads by helical milling | john f's workshop
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Milling machine – making threads by helical milling | john f's workshop
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5 TPI - 22DTER5ACME External American ACME Threading Insert VK8 Grade - Vargus Mach TT | EW Equipment
Practicing a new setup for the real thing, which I'll hopefully be cutting tomorrow. 6" LH double start ACME thread, 1.143" pitch. My first ACME, not to full depth yet. Done on