- Joined
- May 3, 2020
- Messages
- 6
Hi all, first post so be gentle!
I have (and am learning on) a Sieg SC4 lathe which runs 100mm chucks. I do already have a 3 jaw and a 4 jaw, so I am fully operational in that respect, but I was given an old Burnerd No.30 chuck which is really nicely made and in great condition. The Burnerd is a 4" 3 jaw. Can this chuck be adapted to work on the SC4? More to the point; would it be a worthwhile exercise?
For the sake of clarity I will list a few points for consideration....
I messed about with making a template for an adaptor plate and successfully machined a steel plate with a 76mm register to fit the Burnerd chuck perfectly but I'm struggling past that point. I would love to use the chuck but I'm starting to doubt its feasibility. Obviously with it being 3 jaw I am aware of the need for absolute concentricity in anything I come up with.
Am I fighting a losing battle, or am I missing an easy solution to this?
It isn't anything I can't live without, I just like to try/learn if I can!
Thanks for any help you can give
I have (and am learning on) a Sieg SC4 lathe which runs 100mm chucks. I do already have a 3 jaw and a 4 jaw, so I am fully operational in that respect, but I was given an old Burnerd No.30 chuck which is really nicely made and in great condition. The Burnerd is a 4" 3 jaw. Can this chuck be adapted to work on the SC4? More to the point; would it be a worthwhile exercise?
For the sake of clarity I will list a few points for consideration....
- The SC4 uses a 1-piece spindle and chuck backplate, which is 100mm diameter with holes to suit a 3 or 4 jaw chuck (8mm), and a 72mm register.
- My existing 3 & 4 jaw chucks use a 72mm register with M8 fixing bolts so obviously work as they should.
- The Burnerd uses a 76mm register/recess and different fixing holes (I'm guessing 1/4" something or other, can't measure the thread).
- The fixing holes on the Burnerd, aside from being smaller, are not quite the same hole centre as the backplate.
I messed about with making a template for an adaptor plate and successfully machined a steel plate with a 76mm register to fit the Burnerd chuck perfectly but I'm struggling past that point. I would love to use the chuck but I'm starting to doubt its feasibility. Obviously with it being 3 jaw I am aware of the need for absolute concentricity in anything I come up with.
Am I fighting a losing battle, or am I missing an easy solution to this?
It isn't anything I can't live without, I just like to try/learn if I can!
Thanks for any help you can give