OrangeA 5 PCS Collet Set, CAT40 ER32 Collet Chuck, for CNC Engraving Machine & Milling Lathe Tool (CAT40 ER32)

What's not to like at $18 each for a great toolholder. Keep producing these so American manufacturers can tool up and compete with cheap Chinese labor.

For entry level cat 40 holders - these perform very well. I only use them up to 7500 rpm (max speed on my fadal) Good quality.

Run true to +/- .0001. No vibration at 6000 rpm's (max speed on my Haas)

For the price, these holders are probably OK. If you're looking for super high accuracy, be prepared to measure and sort the 5 holders you are getting.The good-the pull stud threads were all good on the ones I got. Running a tap in them all didn't make a single chip-the pull stud threads were the correct 5/8-11 thread, not the 5/8-18 as reported elsewhere-hardness checked out around HRC 50The bad-of the 5, I measured TIR of 0.0002, 0.0002, 0.0003, 0.0003, and 0.0005". The ones at 2 and 3 tenths are usable. 5 tenths is probably going in the scrap bin. The seller's claim is 0.0002" max.-OD grinding is a bit rough. My first 2 got stuck in the spindle. After that I hit them by hand with some silver, ultra-fine scotch-brite, and they stopped sticking. ID (the collet side) looks like the same story.-they are definitely not balanced. There isn't a balance hole drilling to be seen, and on one holder I could visibly see the back-up screw hole was off center. On a low spindle speed machine like mine, this shouldn't be a problem, though.

Work great in my CNC mills - 2012 Haas VF-2 and 1994 Fadal 4020HT.

Très bon produit pour le prix

Thanks very much!!