4 jaw Independent for a 7x12

Thanks for the advice, bought the 80mm (for now) thanks Ron. I have a plan for drilling/boring a 200mm long hole on a 7x12.

Material is 6082 ally 1 1/4. Ill write it out and update.

Thanks fellas.

I believe that the Clarke Cl300 has a different register to the normal mini lathes.
i suppose this is so Machine Mart etc can charge their normal inflated price.
so anything will always have to be 'amended' :P

Of the nbregister on the CL300 does differ from the other Sieg mini lathes, (Chester etc ) since you have a lathe with a 3 jaw chuck, you have machinery to turn a suitable register on a backplate to match the flange.

Once fitted to the flange,the OD can be turned to be the register for the new 4 jaw chuck.

Then it needs to be drilled, possibly tapped, for the fixings for the chuck.

If the chuck body is tapped, you will need to make some pointed studs to screw into the chuck, with which to mark the backplate for the holes.

Since the holes will be clearance, location being by the register of the backplate to the flange, and OD to the chuck, the holes can be a little oversize to take care of any small inaccuracies..

HTH

Howard

I don't know why it's been said that the fixings of chucks on Machine Mart CL300 are different from other Seig machines. I have bought an ER25 chuck and a 4 jaw self centering chuck from Arc Euro and they fit without any modification. I also have the original 3 jaw that came with the machine as well as a 4 jaw independent which came from them. ( before I discovered the alternative suppliers )

Anthony

That was my experience too.

Just been into Machine Mart for something other than machining, to help a friend.

Looking at their latest catalogue, my impression is that prices are higher than our usual model engineering suppliers, such as Arc Euro, Chester or Warco.

Given my previous experiences. they are unlikely to meet any model engineering needs, For others, Toolstation or Screrwfix may on shorter odds of getting the business.

Purely, my past experiences, but in this instance, their competitors did not have what was needed. , .

Howard

I’ve got an 8”x14” Lathe and bought a 100mm Four jaw independent for it at the same time. I was then given a 125mm which has proved so much more useful. If you can run to it, and it’ll fit, I’d go for a 125 if you can.