# Spindle nut pattern and size specifications **URL:** \ **Category:** PwnCNC Spindle System\ **Created:** [April 19, 2024, 12:44pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224 "2024-04-19T12:44:59Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 19, 2024, 12:44pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/1 "2024-04-19T12:44:59Z")
Hi All. I have looked through the knowledgebase and searched in the forum. I cannot find any specification data for the collet nut on the 80mm 2.2kw spindle. I want to buy a torque wrench for the nut on the spindle. There are several types of nut and I would like to know what type of nut is fitted to the 2.2kw 80mm air cooled spindle. I have illustrated several patterns of nut wrench below. Any assistance would be very welcome. [Torque wrench patterns](https://iswisstools.com/products/torque-wrenches/) I have looked at many different ER collet sets and where the vendor has been able to talk about the country of manufacture, I have been surprised to find many are from generic manufacturers in countries which are not known for their QA systems. I had finally settled on an Omega ER 20 collet set and was suprised to find that they were made in India by a generic manufacturer. At a cost of £176.70 ($220) per set (plus 20% VAT) from 2 ~ 13mm, I thought I would want to be able ensure the manufacturer’s quality, which is hard to do when they are not available for handling. Several names presented themselves: Schaublin (the original inventor of the E collet), Techniks whose products are very expensive and Rego-Fix, who modified the original E collet of Schaublin and the modified collet has become the ER collets we know so well today. I decided to buy a set of REGO-FIX collets. Standard collets have a TIR of 10 microns (0.00039") and the Ultra Precision collets have a TIR of 5 microns (0.00019"). They cost £19 ($23.66) and £29 ($36.11) respectively plus 20% VAT. Not as cheap as they could be but they are made in Switzerland so the quality is assured. [Rego-Fix Torque Wrenches](https://us.rego-fix.com/en/products/accessories/torque-wrenches?system=ER&country-detected=true) Thank you. ---
**Author:** ![Chris](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/chris/32/54_2.png) [@Chris](https://forum.pwncnc.com/u/Chris)\ **Post date:** [April 19, 2024, 2:50pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/2 "2024-04-19T14:50:20Z")
If you’re looking for the shape, the [Spindle wrench](https://pwncnc.com/products/spindle-wrench?variant=41834404216971) listing has pictures, which looks like picture 3 from your link ![1000018065](https://canada1.discourse-cdn.com/flex011/uploads/pwncnc/original/1X/24c18ca678e7da1394f976a81225acb095c43ea9.jpeg) ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 19, 2024, 5:21pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/3 "2024-04-19T17:21:41Z")
Thank you… this was the exact information I was looking for. ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 19, 2024, 5:59pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/4 "2024-04-19T17:59:45Z")
I forgot to ask… is the spindle thread M25 x 1.5. TIA ---
**Author:** ![Chris](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/chris/32/54_2.png) [@Chris](https://forum.pwncnc.com/u/Chris)\ **Post date:** [April 19, 2024, 6:17pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/5 "2024-04-19T18:17:30Z")
I don’t have confirmation of that information at this time, but looking at several listing on Google that’s what they were. We’re not trying to reinvent the wheel ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 19, 2024, 7:38pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/6 "2024-04-19T19:38:21Z")
> [@Chris](#): > > I don’t have confirmation of that information at this time, but looking at several listing on Google that’s what they were. We’re not trying to reinvent the wheel Thank you. Perhaps I can find out from your spindle supplier? ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 19, 2024, 8:28pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/7 "2024-04-19T20:28:10Z")
I found this image among your info sheets. It appears to show the spindle diameter as 23mm. [https://support.pwncnc.com/kb/article/136-2-2kw-80mm-er20-air/](https://support.pwncnc.com/kb/article/136-2-2kw-80mm-er20-air/) ---
**Author:** ![Chris](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/chris/32/54_2.png) [@Chris](https://forum.pwncnc.com/u/Chris)\ **Post date:** [April 19, 2024, 10:52pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/8 "2024-04-19T22:52:35Z")
Then it sounds right. Threads are measured by the OD ![1000017579](https://canada1.discourse-cdn.com/flex011/uploads/pwncnc/original/1X/dcfb244d54f365225bc325cb2f123320df8fbf4c.jpeg) ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 19, 2024, 11:10pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/9 "2024-04-19T23:10:02Z")
> [@Chris](#): > > Then it sounds right. Threads are measured by the OD Great! That helps me plan several purchases before my PwnCNC spindle package arrives. Thanks Chris. ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 29, 2024, 12:51am UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/10 "2024-04-29T00:51:53Z")
Could you please tell me what the collet nut extrernal dimensions are. I have seen that they can vary and the dimension across the flats can be anywhere from 28 to 35mm. I need to know so that I can buy the appropriate detachable spanner head for a torque wrench. Thank you. ---
**Author:** ![Chris](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/chris/32/54_2.png) [@Chris](https://forum.pwncnc.com/u/Chris)\ **Post date:** [April 29, 2024, 3:57am UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/11 "2024-04-29T03:57:12Z")
> [@Chris](#): > > If you’re looking for the shape, the [Spindle wrench](https://pwncnc.com/products/spindle-wrench?variant=41834404216971) listing has pictures The flat sizes were available on the spindle wrench listing i shared before in the description ---
**Author:** ![QCDvacuum](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/qcdvacuum/32/338_2.png) [@QCDvacuum](https://forum.pwncnc.com/u/QCDvacuum)\ **Post date:** [April 29, 2024, 5:12pm UTC](https://forum.pwncnc.com/t/spindle-nut-pattern-and-size-specifications/1224/12 "2024-04-29T17:12:42Z")
Thanks Chris… just old age setting in I guess. The excitement is mounting as the day of the Spindle/VFD draws near. 😉