Need Help Identifying a Collet

[Paradude54]

I have an old Micro Mark mini mill, it’s about 25 years old. The collets look like ER collets, I thought that they were ER25s until I measured them. The length is 1.787” and the major diameter is 0.944”. Does anyone have any idea what these are? I lost one in a move and need a replacement, but can’t even search for them until I figure out what I have.

 

[markba633csi]

Picture? Doesn't sound like ER, R8 or Morse

 

[ChazzC]

My Micromark/MicroLux Micro-Mill is Sherline clone and has an MT1 spindle; they sold an ER16 set with MT1 collet holder fir thus mill. IIRC their older Mini-Mills were MT2 before they switched to R8. You can give them a call with the model number and they can tell you. They may also have instructions available on their website that would have the info.