ER Collets

[colin hawesParticipant @colinhawes85982]

I recently bought a 1/8 inch ER20 collet from ArcEuro. I have bought many from there before and they have been very good but the 1/8 inch one has a 4mm dia.centre drilled entrance hole at the business end which means it cannot hold my very short job as it is not gripped adequately. Arc Euro offerred a refund but tell me that such a collet end is not a problem in their experience. The strange thing is , that after 50 years in the engineering industry, I have never come across a collet that does not have a nearly sharp edge there. Any thoughts? Is this unusual in your experience? Colin

[colin hawesParticipant @colinhawes85982]

[Brian WoodParticipant @brianwood45127]

Hello Colin,

That sounds like a mistake, ALL the collets I've seen are bore size right to the mouth.

I would ask them to replace it

Brian

[Les Jones 1Participant @lesjones1]

Hi Colin,
None of the collets (ER25) I have bought from ArcEuro have such a large chamfer. I have a full metric set which I bought in July 2011 plus an 1/8" and a 1/4" which I bought last August. They have a very slight chamfer of probably less than 0.5 mm.

Les.

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