# Missing bearings **URL:** \ **Category:** Frame\ **Created:** [April 24, 2025, 9:45am UTC](https://forums.maslowcnc.com/t/missing-bearings/23883 "2025-04-24T09:45:46Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![TimS](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/tims/32/17329_2.png) [@TimS](https://forums.maslowcnc.com/u/TimS)\ **Post date:** [April 24, 2025, 5:34pm UTC](https://forums.maslowcnc.com/t/missing-bearings/23883/5 "2025-04-24T17:34:41Z")
> [@Bearing part number](https://forums.maslowcnc.com/t/bearing-part-number/23767/2): > > You should have got 30 bearings in 3 tubes. The on the top of the arm that has the motor mounted to it. The hole that the motor shaft goes through doesn’t get a bearing, only the bottom hole for the motor. All others will get a bearing on the top and bottom. I made this mistake but caught after assembling one arm. See above link for what I found after watching the 4.1 arm upgrade kit video. Luckily I only had 1 arm together. Video is at the link below. > **[4.1 Upgrade Instructions — Maslow](https://www.maslowcnc.com/41-upgrade-instructions)** --- _[View the full topic](https://forums.maslowcnc.com/t/missing-bearings/23883)._