General discussion > Shop Made Tools

Cutting Threads on a Lathe.

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Bsharp:


My brother showed me how to cut threads that are cutting away. [much safer and less stress of crashing]

Internal, you just need a left hand tap to revamp or a LH threading tool with inserts. No. 4



External, an upside down cutter holder. Run in reverse and feed out.

RH threads.

Just allow a little room for feeding in on the shoulder.

Bob Roller:
My way as well and no real need to run the lathe in back gear.
Bob Roller

Bsharp:

--- Quote from: Bob Roller on May 31, 2021, 02:31:25 AM ---My way as well and no real need to run the lathe in back gear.
Bob Roller

--- End quote ---

Please explain how you get it to cut, if not running in reverse? [and feeding out with upside down holder]

James Rogers:
Back gear is the term for engaging the rear gears of a lathe that create a slower spindle with good power. Like low 4 or pulling gear : )

Bsharp:

--- Quote from: James Rogers on May 31, 2021, 06:22:45 AM ---Back gear is the term for engaging the rear gears of a lathe that create a slower spindle with good power. Like low 4 or pulling gear : )

--- End quote ---

Terminology for Hi and Low, not Forward and Reverse.......Thanks!

My ole 1937 Southbend does well in High, Low speed. I may look at Low, High speed....one less thing to change.

Thanks for the tip, Low in High is very doable on the ole girl, just a little more noise. Not too fast!

But anyway, you need to get the tooling to feed away from the chuck when threading.

Not only safer, but it can be faster.

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