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X/Z linear rail bearings?  

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8bitfusion
(@8bitfusion)
Active Member
X/Z linear rail bearings?

Hi all. I made a mistake and lost quite a few bearings from my Z axis rail which has the piece which holds up the bed. Is anyone familiar with the size of the bearings in that Z axis housing? 

I do not have calipers to measure precisely.

Best Answer by 8bitfusion:

Sorry, i found a wrong ball bearing on the floor somehow - they are actually 2.48mm

Posted : 23/01/2026 2:37 pm
8bitfusion
(@8bitfusion)
Active Member
Topic starter answered:
RE:

Update, they are 3.95mm diameter. Had to buy a set of calipers, probably needed them in the future at some point. 

Will also be using this tool to reinsert! 

https://www.printables.com/model/1409176-linear-rail-bearing-carriage-insertion-tool-prusa/files

Posted : 28/01/2026 4:22 am
8bitfusion
(@8bitfusion)
Active Member
Topic starter answered:
RE: X/Z linear rail bearings?

Sorry, i found a wrong ball bearing on the floor somehow - they are actually 2.48mm

Posted : 29/01/2026 1:27 am
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