Heavy 10 headstock thread

[internationalgeo]

can any body help me on head stock thread on a south bend 10 I just got I believe it has a
1.1/2" x 8 tpi and need to no does the thread have whitworth type thread with 55 degree angle or American type thread with a 60 degree angle new lathe work and over in England and a lot of lathes over here use whitworth threads would appreciate any help

 

[iwananew10K]

SB is 60 deg

 

[johnoder]

Made with either 1 7/8 - 8 or 2 1/4-8 if it was the large bore version. no whitworth, no 55 degrees

Assumes you do mean Heavy 10

 

[michiganbuck]

Made with either 1 7/8 - 8 or 2 1/4-8 if it was the large bore version. no whitworth, no 55 degrees

Assumes you do mean Heavy 10

If you think it a 1 1/2-8 and johnoder says it a 1 7/8 or 2 1/4-8.. then you better had measure it with proper tools to be sure... that seems way apart..

 

[internationalgeo]

thanks Johnoder
for the reply cannot get the chuck off at the moment (Seized)removed chuck from back plate and it only seems to be about 1.1/2"cant measure properly but the faceplate that came with it is 1.1/2" x 8 tpi but not sure its the right one the hole in the other end of the spindle is only 1" so I think its only a regular spindle not the larger spindle if that makes sense

 

[johnoder]

thanks Johnoder
for the reply cannot get the chuck off at the moment (Seized)removed chuck from back plate and it only seems to be about 1.1/2"cant measure properly but the faceplate that came with it is 1.1/2" x 8 tpi but not sure its the right one the hole in the other end of the spindle is only 1" so I think its only a regular spindle not the larger spindle if that makes sense

Its easy. If a "Heavy Ten" it has one of the threads mentioned in my post above. If it has a 1 1/2-8 thread it is not a "Heavy Ten" - but could be a "light Ten" or "10K"

Serial number right end on top in between two front ways will tell us exactly what it is

A 199 Z with a 108XXX serial is a 10R from early forties with 1 7/8-8 thread

 

[comstockfriend]

One of the tasty sites to figure out what you have...

http://www.lathes.co.uk/southbend/index.html

 

[internationalgeo]

hi again john
serial #108262 cat199Z would that make it light ten or 10K would help if I could find out

regards george

 

[internationalgeo]

Thanks for your help I shall have another go at getting the chuck off and measure again
tomorrow many thanks

 

[johnoder]

See revised post #6 above

hi again john
serial #108262 cat199Z would that make it light ten or 10K would help if I could find out

regards george

 

[comstockfriend]

See post #39 of this thread for how to hold the spindle when removing a stuck chuck.

http://www.practicalmachinist.com/v...emove-stuck-chuck-tutorial-165028/index2.html

John