Re: Reverse operation with 10k screw spindle

John Dammeyer

Since I have a Heavy 10L with taper attachment apparently the need to mount a parting tool upside down behind the lathe with the spindle turning in reverse isn't required.  Although I must say, parting off is still a bit scary.


But other than that, why does one need to run the spindle in reverse at all?





From: [] On Behalf Of Jim_B
Sent: September-23-19 9:40 AM
Subject: Re: [SouthBendLathe] Reverse operation with 10k screw spindle


If your work is less than 1/2” in diameter use a 3C collet, or 5/8" with a 6K collet. 

I have also seen small chucks mounted to a collet or Morse taper. 


I used to have a couple. 


Sent from my MacBook

Jim B.




On Sep 23, 2019, at 12:32 PM, m. allan noah <kitno455@...> wrote:


I run threaded chucks in reverse quite often. Never had one come off.
But, I do avoid interrupted cuts.


On Mon, Sep 23, 2019 at 12:25 PM <dfuller440@...> wrote:

Got a question about my 10k SB lathe with the 1-1/2" x 8 spindle.
Is there any way to -safely- run the lathe in reverse with the chuck to do a specific cutting operation?
On my old Jet 9x20, the chuck had a safety screw to keep the chuck from flying off in reverse.  I don't think that my 10k lends itself to a safety screw without messing up the register.
Any suggestions or do I need to forget about reverse operation?  (BTW, motor will reverse.)

"well, I stand up next to a mountain- and I chop it down with the edge
of my hand"


Jim B

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