Spring Collet Type

[Ken76]

Good evening.
I have a Clarke CDM300 milling machine and have a milling chuck part number 7610866 with 7 collets that came as a set. I've been trying to find more collets that fit that chuck, the collet size is 24mm OD x 45 mm long. I've looked at ER collets and can't seem to find the correct size. Any advice would be much appreciated. Many thanks. Ken.

 

[MrWhoopee]

A picture is worth 1000 words.

 

[Ken76]

Thank you, I should have attached some pictures. I used a micrometer to get the sizes and have checked the sizes a couple of times and they are correct.

 

[Illinoyance]

They look like TG collets.

TG Collets

 

[Ken76]

Thank you for your help.