Internal size for 5C draw tube.

[WV_almostHeaven]

Looking for the size I should bore the tube to as I make a new draw bar. I know that the thread is 1.238 x 20. What would be the best size to bore the tube too, for single point threading?
Thanks for your help.

 

[RJSakowski]

1.238-1/20 = 1.188" for 75% threads. I measured 1.200" on my 5C chuck

 

[WV_almostHeaven]

Thank you very much. Now to start the process.

 

[BGHansen]

I had to modify the tube of a different model lathe 5C collet closer for my Grizzly G0709 lathe. My thread is below. Caveat is I shot for a 1.25 x 20 thread, not 1.238".

Bruce

5-c Collet Closer Installation To A G0709

Santa brought me an early present this year, a 5-C lever style collet closer for my Grizzly G0709 lathe! Grizzly does not sell a collet closer specifically for the G0709, but they do sell one for a 14 x 40 lathe (model H5948). The price is right at $270. The regular price is $450 so these are...

www.hobby-machinist.com

 

[WV_almostHeaven]

Thanks kind Sir.