# Need to get longer bolts or

**URL:** <https://forum.onefinitycnc.com/t/need-to-get-longer-bolts-or/21713>\
**Category:** Original/PRO Series (Buildbotics) (Gen 1)\
**Created:** [August 2, 2023, 1:29am UTC](https://forum.onefinitycnc.com/t/need-to-get-longer-bolts-or/21713 "2023-08-02T01:29:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![TNTimberworksCo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/tntimberworksco/32/25029_2.png) [@TNTimberworksCo](https://forum.onefinitycnc.com/u/TNTimberworksCo)\
**Post date:** [August 2, 2023, 1:29am UTC](https://forum.onefinitycnc.com/t/need-to-get-longer-bolts-or/21713/1 "2023-08-02T01:29:00Z")

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Let me start off by saying I did see the bot/screw spec post. Problem is, I can’t figure out which one is the ones I need. I’m looking to get longer bolts for the ball nut to gantry. The original bolts are not biting and feeding any longer. I don’t even know if this will fix the problem. I was going to use a tap and dye set to rethread, but I’m not really comfortable doing that.  
Any assistance would be greatly appreciated !

 ![IMG_2](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/3/b/3bb4659cf8dcffb8e26c12989a89dd2d2f8cfe90.jpeg)  
 ![IMG_1](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/7/8/7806672b140ffc8872e1f524707840c6f1b965f9.jpeg)

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**Author:** ![TMToronto](https://avatars.discourse-cdn.com/v4/letter/t/7ea924/32.png) [@TMToronto](https://forum.onefinitycnc.com/u/TMToronto)\
**Post date:** [August 2, 2023, 2:27am UTC](https://forum.onefinitycnc.com/t/need-to-get-longer-bolts-or/21713/2 "2023-08-02T02:27:43Z")

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I have a Woodworker with upgraded X50.  
The SHCSs are M5.  
On my Y axis they are M5x16mm, and on the X axis they are M5x20.

I measured the threaded hole on both using an extra stepper motor bolt, and found each could accommodate at least an M5x25mm SHCS (the motor bolts have a thread that stops at about 23 mm and I stopped when I met resistance).

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**Author:** ![PaulC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/paulc/32/790_2.png) [@PaulC](https://forum.onefinitycnc.com/u/PaulC)\
**Post date:** [August 2, 2023, 4:31pm UTC](https://forum.onefinitycnc.com/t/need-to-get-longer-bolts-or/21713/3 "2023-08-02T16:31:30Z")

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Is your machine under warranty? Have you emailed Onfinity Support? They are super helpful.