1941 South Bend 13″ Lathe Restoration – Part 8 – Single Tumbler Gear Box Disassembly

I disassemble, with a little trouble, the single tumbler quick change gear box on my 1941 13″ South Bend lathe. The gear box allows you to control the speed the lead screw rotates, in relationship to the speed of the spindle. This allows you to accurately cut threads for screws, bolts and nuts as well as adjust the feed rate for facing and turning operations. I had a bit of trouble with some seized parts and things got a little hot.

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