Tegara ER32 Slot Style Ball Bearing Collet Nut 202-1574 P[

Given the price, my expectations were not high... I was initially pleasantly surprised by the fit and finish. After using it a few times and getting excellent concentricity, curiosity got the better of me and I disassembled it to check out the bearings and see if there was any indication of wear. Disassembly is pretty simple - remove the sealant from the small grub screw on the side, remove the screw, and then rotate the inner part of the assembly to remove the balls one-by-one. There are approximately 30 balls (didn't count them, sorry), and the handful that I mic'd were all on the same tenth. The bearing races were ground to an impressive finish, and showed no signs of contamination or uneven wear. Speaking of contamination - I was shocked to find an o-ring on the inner side of the bearing to prevent the grease from being washed out when using through-coolant. This seems to be the real deal, even if the price is a fraction of what a big-name ball bearing nut would cost.

This is the nut I've been looking for! I tried balancing the other ER20 collet nuts too no avail! This collet nut fits my 2.2kw spindle perfectly. My spindle vibration at 12k rotation speed is gone. With a little finessing of my cheap collet, I can get zero runout on a ground 1/4" pin in a 1/4 inch collet. That works for me just fine. Thank you for a quality product!

I purchased this Jan 10th and only now got to use it. Here is the issue with this, the spring inside is made wrong. It is extremely difficult to snap in my ER40 collets. Whats more is being so tight when you do get it snapped in a 1/2" collet will not accept a 1/2" drill rod! I spent an hour with it and then went back using my original nut. Very unhappy, Wayne

Seems nice but haven't used it yet. Be aware that If you buy this you'll need a special wrench. Ordinary adjustable wrenches won't work, and neither will typical spanner wrenches that typically have 3-4 tangs. This one will only accept a single-tang tool.

these are very accurate, any one trying to get as accurate precision Collet system this is it! I bought a set of Ericksons Collets for my ER20 Spindle but this is the best most accurate Collet nut I could find along with being a bearing type! will be buying more in the future as well

People who purchase this need to know; standard ER32 collet chuck wrenches won’t work with this and it doesn’t come with a wrench which will. Out of the box, it’s pretty much useless.

A worthwhile upgrade from the stock ER32 nut. Greater clamping power with less effort due to the bearings. Awin win in my books.

I bought this hoping to fix runout on a cheap set of collets. Well, nope. But it did make the runout consistent for each collet. With the old nut I could get different runout by simply lossening and retightening. This one is smooth and I really like it. Another review said it was a 4 slot nut but mine is the standard 6 slot.