Need Help!- Recommended grease for Linear rail truck bearings

[mlabruyere]

I purchased some used trucks and rails of eBay. the trucks were packed with tons of old grease. I cleaned out all the old grease but now I need to repack them.

I was thinking lithium grease....is this OK?

[Geof]

That is what Haas recommends for greasing the linear ways on their TM, TL and GR machines.

[jt9d]

isoflex NBU 15 is very commonly used. not too thick so not too much drag.
avoid any greases that are marked EP. This stands for extreme pressure additive. this is used to dissolve small particles of metal created by micro-welding of metal under high load. The additive can reduce the life of linear bearings and ball nuts.
regards

Matt

[mlabruyere]

Thanks guys, I am going to give the lithium a try then.

This is my first go at using "real" linear bearings....I am suprised at just how tight these things really are! My skate bearing based trucks will slide along a rail when pushed and hit the bump stops....these will only move when you actually push on them and then stop when you release them.


Happy Halloween to everyone!

[jt9d]

They are always stiffer, remember you are sliding well fitting rubber seals along also, when they are first packed with greaser they are also firmer. When greasing, i always ask my customers to grease and then jog slowly for 300mm or so, to work the grease through. other-wise you can get a pressure build up of grease at one end and pop a seal out a bit.
Remember these bearings are designed to take big loads with minimal clearance or movement in the direction of load. I think you will find that if you put 100kg's of load on your skate bearings it may not move as well!!
good luck!
regards

Matt

[mlabruyere]

Originally Posted by jt9d I think you will find that if you put 100kg's of load on your skate bearings it may not move as well!! good luck! regards Matt

I actually cracked one of my skate bearings.....dang it....