- Joined
- Jun 10, 2014
- Messages
- 9
Hi everyone,
I'm considering my chuck options for my SB 13. Unfortunately it has the bizarro 1-7/8 x 8 spindle thread, so nothing is straightforward. I have an 8" independent 4-jaw chuck. Here's what I'm thinking about:
<>Adjustable 8" 3-jaw. This will require custom machining a back plate, either by adding a pilot to an adapter plate that has the right thread, or by machining out the thread on the chuck's backplate. I like the flexibility of doing small and large parts and having less runnout than a traditional scroll chuck, and the ability to really dial out runnout on critical parts. Pretty expensive, though, especially if I farm out the machining.
<>Adjustable 5C collet chuck (Bison). I think I could machine the adapter plate that has the right thread to fit. I would use this for small parts and use the 4-jaw for larger parts. Also pretty expensive once you add in all the collets.
<>Modify a TG100 collet chuck and hold it in the 4-jaw chuck. I already have a full set of 1/64 increment collets for my mill. This could potentially be pretty cheap. I would get a straight-shank collet chuck and modify it for use in the lathe. Not sure exactly what that will entail. I wouldn't want it to stick into the spindle since that would severely limit the diameter of long stock, and I don't want a lot of extension, so I'd probably need to cut the length down. Are these typically hardened, or could I just use a cutoff tool? It's also not clear to me how many of these are hollow. I've seen a few that look to be hollow except for a stop screw. I assume that would be pretty trivial to remove, or are they permanently affixed in there somehow?
Anything else I should be considering?
Thanks!
Tom
I'm considering my chuck options for my SB 13. Unfortunately it has the bizarro 1-7/8 x 8 spindle thread, so nothing is straightforward. I have an 8" independent 4-jaw chuck. Here's what I'm thinking about:
<>Adjustable 8" 3-jaw. This will require custom machining a back plate, either by adding a pilot to an adapter plate that has the right thread, or by machining out the thread on the chuck's backplate. I like the flexibility of doing small and large parts and having less runnout than a traditional scroll chuck, and the ability to really dial out runnout on critical parts. Pretty expensive, though, especially if I farm out the machining.
<>Adjustable 5C collet chuck (Bison). I think I could machine the adapter plate that has the right thread to fit. I would use this for small parts and use the 4-jaw for larger parts. Also pretty expensive once you add in all the collets.
<>Modify a TG100 collet chuck and hold it in the 4-jaw chuck. I already have a full set of 1/64 increment collets for my mill. This could potentially be pretty cheap. I would get a straight-shank collet chuck and modify it for use in the lathe. Not sure exactly what that will entail. I wouldn't want it to stick into the spindle since that would severely limit the diameter of long stock, and I don't want a lot of extension, so I'd probably need to cut the length down. Are these typically hardened, or could I just use a cutoff tool? It's also not clear to me how many of these are hollow. I've seen a few that look to be hollow except for a stop screw. I assume that would be pretty trivial to remove, or are they permanently affixed in there somehow?
Anything else I should be considering?
Thanks!
Tom
