1. #1
    as title....googled but not found the answer.

    URL reference would be nice.


  2. #2
    Extended Range me thinks.

  3. #3
    i2i's Avatar
    Lives in Cardiff, United Kingdom. Last Activity: 5 Days Ago Has been a member for 7-8 years. Has a total post count of 692. Received thanks 29 times, giving thanks to others 0 times.
    Elizabeth Regina

  4. Well from what I can find out about ER from Rego-Fix (the company who patented them in 1973) it was simply the mark they used when setting up that type of collet. It was later moved over to a DIN number 6499 (which nobody pretty much uses including Rego-Fix). They claim that they product has <3um of TIR (which considering the cost of their parts I hope so). Hope that helps.


  5. #5
    thanks all...

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