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All Replies on Talon chuck with insert (1 1/4 x 8) cross LH/RH threaded question

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View 9x9's profile

Talon chuck with insert (1 1/4 x 8) cross LH/RH threaded question

by 9x9
posted 02-13-2018 04:08 PM


4 replies so far

View GR8HUNTER's profile

GR8HUNTER

5819 posts in 1039 days


#1 posted 02-13-2018 04:12 PM

WHAT ?? :<))

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View LeeMills's profile

LeeMills

657 posts in 1628 days


#2 posted 02-13-2018 07:51 PM

Nova makes an insert which is LH/RH also but I haven’t used one.
I would think they would hold up fine. All of my chucks are sorta wobbly threading them on until the end of the insert seats against the headstock. I don’t think the treads do much as the transfer of power is at the end. Maybe we have some engineers who have had experience with them.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

View HapHazzard's profile

HapHazzard

116 posts in 1195 days


#3 posted 02-15-2018 02:30 AM

At the risk of stating the obvious, it all comes down to precision and choice of material. 50% cut cross-threads in 1.25-ish 1018 steel won’t last too long. 75% or better in 1.250” 4340, carburized, now you’re talking.

-- Unix programmers never die; they just > /dev/null

View Wildwood's profile

Wildwood

2589 posts in 2461 days


#4 posted 02-15-2018 02:11 PM

Doubt if Oneway makes an insert 1 1/4” x 8 TPI RH/LH thread. Could not find one at thier site. They may make one special for you but not sure worth the trouble or expense. 99% of your turning will be over the ways.
Would not have any idea about run out. Just the cost of Robust accessories needed to turn out board would have me making something else work.

Might make more sense to get a Oneway LH threaded face plate. They do make have plates in different sizes(3,4, 6, & 8”) to fit your lathe with RH/LH threads.

If not mistaken picture of outbaord tuning using a faceplate.

http://www.turnrobust.com/lathe-overview/scout/

I would rather have just left hand threads versus combo RH/LH.

-- Bill

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