# Damaged Ball Screw

**URL:** <https://forum.onefinitycnc.com/t/damaged-ball-screw/7624>\
**Category:** Troubleshooting (X35/X50)\
**Created:** [September 8, 2021, 3:57pm UTC](https://forum.onefinitycnc.com/t/damaged-ball-screw/7624 "2021-09-08T15:57:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Kyle](https://avatars.discourse-cdn.com/v4/letter/k/848f3c/32.png) [@Kyle](https://forum.onefinitycnc.com/u/Kyle)\
**Post date:** [September 8, 2021, 3:57pm UTC](https://forum.onefinitycnc.com/t/damaged-ball-screw/7624/1 "2021-09-08T15:57:57Z")

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I noticed a thud-thud sound today as I pushed my spindle back along the y axis. After investigating it looks like there is a small nick on ball screw of the left y rail. Is it something I should be concerned about causing issues over time? Do I need to replace it?

Here is a video of the sound: [Microsoft OneDrive - Access files anywhere. Create docs with free Office Online.](https://1drv.ms/v/s!Akmzw8OOyoWLogCD1MeatpvnMpHF)

Here is one showing the small nick moving (I couldn’t get a good picture of it) [Microsoft OneDrive - Access files anywhere. Create docs with free Office Online.](https://1drv.ms/v/s!Akmzw8OOyoWLoX8eCEHcIy-CR3Cd)

Thanks in advance to anyone who is able to help me out!