# Bits not spinning true

**URL:** https://forum.pwncnc.com/t/bits-not-spinning-true/1869
**Category:** General
**Created:** [July 29, 2024, 2:26pm UTC](https://forum.pwncnc.com/t/bits-not-spinning-true/1869 "2024-07-29T14:26:39Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![MwBeard](https://avatars.discourse-cdn.com/v4/letter/m/aca169/32.png) [@MwBeard](https://forum.pwncnc.com/u/MwBeard)
#### Post date: [July 29, 2024, 2:26pm UTC](https://forum.pwncnc.com/t/bits-not-spinning-true/1869/1 "2024-07-29T14:26:39Z")

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Have been having trouble with bits coming loose during cuts, checked shaft today and checks out horizontally as well as vertically with no tool installed. Once tool is installed regardless of collet size a very prominent wobble is visible in the bit shaft. This apparent out of round condition is what’s causing bits to come loose and creating ragged cuts. Any options to correcting this other than replacement?  
It’s a 65mm Air Cooled Unit

Thanks!

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### 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: [July 29, 2024, 3:21pm UTC](https://forum.pwncnc.com/t/bits-not-spinning-true/1869/2 "2024-07-29T15:21:41Z")

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It sounds like the collet isn’t installed in the nut correctly. You should hear a distinct snap and you should be able to turn the nut over and the collet not fall out

[https://support.pwncnc.com/kb/article/253-er-collets-a-how-to/](https://support.pwncnc.com/kb/article/253-er-collets-a-how-to/)

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<div class="post-metadata">

### Author: ![MwBeard](https://avatars.discourse-cdn.com/v4/letter/m/aca169/32.png) [@MwBeard](https://forum.pwncnc.com/u/MwBeard)
#### Post date: [July 29, 2024, 4:52pm UTC](https://forum.pwncnc.com/t/bits-not-spinning-true/1869/3 "2024-07-29T16:52:17Z")

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That appears to have been the issue Chris, Thanks!  
Had to push really hard the first time, seems to work fine now.

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### 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: [July 29, 2024, 5:29pm UTC](https://forum.pwncnc.com/t/bits-not-spinning-true/1869/4 "2024-07-29T17:29:07Z")

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You shouldn’t have to push too hard.

Basically put them in at an angle, then push them from the side bringing them straight. To remove its roll back and snap out.

![Image20210126081223](https://canada1.discourse-cdn.com/flex011/uploads/pwncnc/original/1X/1d658c20702d99c4cfa2d03aadceafdf0f2a9f5d.webp)

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<div class="post-metadata">

### Author: ![MwBeard](https://avatars.discourse-cdn.com/v4/letter/m/aca169/32.png) [@MwBeard](https://forum.pwncnc.com/u/MwBeard)
#### Post date: [July 29, 2024, 6:38pm UTC](https://forum.pwncnc.com/t/bits-not-spinning-true/1869/5 "2024-07-29T18:38:38Z")

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Thanks Chris, after all the complexities getting this thing running as desired it was this simple procedure that ruined my most time consuming project so far. It’s the simple things that get you every time it seems.

Much appreciated!