Posted by Dell on 12/02/2023 14:38:44:
Purchased this collet chuck made by Myford but to take ER 25 collets, just need to get a semi decent set of collets, I know there are literally 100’s out there but for what I do ( clocks ) I can’t justify spending 100’s£ but I don’t want Chinese ones so if anyone has any suggestions it would be much appreciated,
I can't speak for ER25 – I only use the set I have in Stevenson blocks for work holding. However I have bought ER16 collets from both ARC and CTC tools. My ARC set are quoted as 0.008mm but I only got the standard (0.0015 ) tolerance set from CTC tools, but both sets work well and are more accurate than the specs.
I suspect both sets are Chinese (the CTC ones certainly are) , but I would have no quibble with either set. CTC quote their imperial ER25 set as 0.0006" Run-Out Tolerance, and do more precise ones in metric quoting 0.008mm (0.0003" ).
One trick I have used is when trying to hold short lengths of material, is to put a same sized bar in the back of the collet. I often use a suitable drill shank.
Edited to remove random smiley!!
Edited By Peter Cook 6 on 12/02/2023 18:37:41