MR1 Bearing Issues and Build Pics

MR-1
1

Hey y’all. My MR1 arrived about a month ago and I’ve been slowly getting it built. I was wondering if anyone has had issues with their linear bearings? One of my y-axis bearings was bad (Langmuir was very helpful and sent out a whole new rail with preinstalled bearings) and I just found out yesterday one of my x-axis bearings is also bad. Seems like an installation issue as it feels like some of the balls may have popped out. Video is attached below showing the bearing (in a google drive folder as videos don’t seem to be supported on this forum). I’m tempted to leave it as I am impatient and want to get moving on the build. Seems like the bearing could wear out prematurely though if its missing balls given that it will be constantly changing direction due to the nature of the machine.

Some pics of my build/mods:

Contoured the concrete and then did a two-part epoxy pour, re-sloping the machine for each half for better coolant flow to drains. I didn’t see what some of y’all were doing with the shower drains until too late…wishing I had done that.

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Building some integral drawers using some scrap extrusion and 14ga sheet metal (I’m too cheap to buy a tool box and I have a ton of practically free heavy duty drawer slides)

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Should create a nice clean front with a push to open spring latch.

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2

Update on the bearings. Just spoke with one of Langmuir’s techs. They agreed to overnight new bearings. Very happy with the customer service so far.

3

so, you are keeping the plastic ball holder in place while you slide the bearing onto the rail correct? You should not be removing that plastic rail before installation. The rail itself should force the ball holder out of the bearing as you install it. If not the balls are gonna fall out every time…

4

Sort of. I have worked with these linear bearings a good bit in the past and would normally do this. However, the bearings that LM provides come preinstalled on the rails, so I have not messed with them (the instructions specifically say to not remove the bearings from the rail due to the difficulty of reassembly).