I work in a plant that makes automation machinery and we build machines that use linear bearings a lot. Very expensive ones from THK Japan. I always thought it was weird on the A1 printer that on the Z axis you have access to a lubing point, however on the x you do not. bambu says to put oil along …

[image] Lubricated or Not? Bambu Lab H2 Series Someone ended up with an extra H2S x-axis linear rail they are sending me, I’m going to take it apart for science. Will I discover it is: poll I’m guessing unlubricated, but would love to be surprised.

that sounds cool. The bearing assembly will definitely have a greasing point, I just wish I could access mine without tearing the entire extruder off.

On my A1 mini I greased the Z axis bearing, it was easy to get to the port. Because of the proximity of belts in the units I’m reconsidering my use of normal greases and might try to find something synthetic to use on my printers. The above referenced thread was questioning if the rails were ever …

3D printing is a noncontact manufacturing process, there just aren’t high forces going into the bearings, they don’t need the pressure resistance of grease. Light oil is plenty sufficient in this case. Grease would actually be a bad thing as it takes far more force to move a small bearing through gr…

Linear bearing grease packing

Bambu Lab A Series Troubleshooting

krellboy April 30, 2026, 6:39am 2