Small lathe Spindle Info.

[jumps4]

the 8x12,14 takes a 4" plain back 3 jaw chuck
i'm looking for dimensions
steve

 

[7HC]

Thanks Steve!!! Do you think the owners would want 1" max or 3/4" max collets? I might make one of each. Might you also have information on the other spindles? That print was great!!

Frank

What do these collets look like and what size are they. Do they compare to say an ER32?

M

 

[jumps4]

here are the important dimensions for the 8x lathes:

• 72mm = diameter of the inner relief
• 84mm = diameter of the bolt hole pattern
• 3.5mm = depth of the relief

steve

 

[jumps4]

here is a pic should be tg100
steve

 

[7HC]

Hi 7HC Yes they are about the same, ER 32 ia about 1.3" OD X 1.6" long, 13/16 max. ID ER 40 1.6 OD X 1.8 long 1" max ID
100 TG 1 .4" OD X 2.4" long 1" max ID
I have a photo of the 100 TG series collet (1") in Tools and Tooling Plus the tool holders I plane to modify, one I started.

Frank

Ok, I found the pics. The thing with the 7 x models, especially the 7 x 10 is the limited bed length.
That's why 5C collets are of little use, and anything that uses the MT requires a drawbar which prevents work from passing back out through the spindle.


If you can make a holder mounted on a backplate to reduce the overall length as much as possible you could have something going there.

Hear's a pic of a typical ER32 collet chuck on a 7 x from gadgetbuilder:



Do you have a bunch of these collets available, and/or are they a readily available item?

M

 

[jumps4]

what is a 'bc" frank, I'm not sure what your wanting and for what size lathe
steve

 

[jumps4]

both the spindles for the 7 and the 8 use 3 holes for m8 bolts to mount their chucks and the 8 uses a 4" chuck so i'd say the backing plate is 4" but i'm not sure yet
steve

 

[jumps4]

frank I would make it for the 7in because they sold tens of thousands of those lathes
and the outside diameter is 80mm the bolt circle is 66mm and i would only use 3 bolt holes not all 7" are drilled for a 4 bolt pattern.
steve

 

[jumps4]

not all 8" are drilled for a 4 bolt either
the 8" has a 72mm registration boss
and the aprox od of 102mm i havent found the exact but 102mm is about 4"
steve

 

[jumps4]

I'd put them on ebay before scrapping them
steve