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Swingup external threading tool
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AdeV:

--- Quote from: DaveH on June 08, 2011, 07:24:06 AM ---
And if it is really really tricky I turn the chuck by hand - that's slow :D
and it makes my arm ache :(


--- End quote ---

Could you make/obtain a crank handle that goes in the back of your spindle? That would make turning the lathe easier; and would also mean you could turn right up to a shoulder with excellent accuracy. It'd also be great with a swing-up holder, because you're in total control of the speed & direction of the stock; so you just wind forwards to the end point, backwards to get off the thread, move the cross slide (or top slide, depending on how you're cutting) in a few thou, rinse & repeat.
No1_sonuk:

--- Quote from: wheeltapper on June 08, 2011, 06:57:49 AM ---I use my one on a Chester Comet minilathe , that hasn't got a brake and the lowest speed is 100 rpm.
I cut a runout groove with a parting off tool and I seem to manage.
--- End quote ---
Same for me, but Chester DB7VS (a 7x12 size machine).
DaveH:
My lathe is the same as Chester Crusader only without the bells and whistles and 1990 ish,

The hand crank is a good idea :clap: - only in the past when I have looked at it - seems it maybe a bit of a stretch. :doh:

I think I must have short arms :lol:

Thank you all, I really appreciate your input  :thumbup:

I'm going to look at the hand crank again.

DaveH
krv3000:
HI all well i have cut threds on my lathe witch is a emco compact 8 by hand crank i tride to cut a thred the way it tels you in the manuwel and it all went rong the lathe has a cluch so wat shud hapen is you hit your stope and the cluch cuts in and all stops but this did not hapen and at furst i thort i wood have to by a new leed scruw untill i fawnd out that ther is a sacrifishel pin that gives way  at the end of the chaft   from bob
wheeltapper:
A hand crank is definitely the way to go, especially for short threads up to a shoulder, there's just no time to get into the swing.
I made mine so I can fit either a handle or a change wheel for indexing, there's some pics on here somewhere.

Roy
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