Cardinal Mk II Chuck Key

[Mad Professor]

Good day all.

I am trying to find a new key for my chuck, but I don't know where to start.

All the standard chuck keys I have are way to small for this chuck.

Here are all the details stamped on the chuck.

Cardinal Mk II
Pat No 651588
D
1/2"
No33 Taper
CA12

Thanks for your time.

[Jonathan]

Measure the size of the (probably) square hole in the chuck for the key, then you should be able to find one to fit. If not I can make one.

[Swarfing]

Or contact these for the spec, the manufactured the cardinal many years ago :tup:

BROOKE CUTTING TOOLS (UK) LTD

• ALL ENQUIRIES-MAIN SWITCHBOARD, HELLABY IND EST, DENBY WY, HELLABY, ROTHERHAM
  S66 8HU ROTHERHAM , SOUTH YORKSHIRE
  
  Phone : 01709 314500
  Fax : 01709 314501
  E-mail : Send messagewww.brooke.co.uk

[Jonathan]

I should have noticed from the original post that it's a drill chuck, not a lathe chuck .

[graffian]

I have a 1/2" cardinal chuck, it's physically the same size as the 1/2" jacobs chucks
I have and uses the same key. I think the jacobs are type 34. I will write down the key
number and measure the diameter tomorrow.

[Mad Professor]

graffian: did you have any luck finding out any details regarding the key?

The chuck pilot hole seems to be 5/16 [0.3125"] (7.9375mm).

[Swarfing]

This may help? The chap modified a K4 Jacobs chuck key for his MT3 tapered drill chuck. Looking at though you may get away with a 16mm chuck key?

http://www.practicalmachinist.com/vb...-3-4-a-172002/