Axle bearings

MF294-4

Member
How tight should the bearings fit on the axle? Took two sets off and they slid off the shaft very easy and the new bearings slide on very easy. To loose in my opinion but all the bearings seem to be the same. Should I use a center punch on the axle to tighten them up?
 
Axle bearings are usually a slip fit on the axle. They are designed to slowly rotate on the axle to extend their life. Most of the wear occurs on the bottom side of the cone as that is where the load is carried. Allowing them to rotate evens out the wear to give them longer life.
 
That's good to know I always figured they should be tight so they would not spin on shaft in cold weather (axle grease is pretty sticky @ -30)
 
They generally slip fairly easily onto/over the greased up axle stub. Ive not had any that were so tight you had to drive them on or Id be worried!!! The one place I have used a dot punch is if the races are loose in the hubs as those are made to be a relatively tight press/drive in fit so they DO NOT TURN........

John T
 
I just had one burn out on a similar sized trailer. It boogered up the axle stub (outer) a little, made the new bearing not want to go on all the way. Took a fine cut file, and stroked a little metal, mostly off the bottom, spraying with oil, to wash the filings off. till the bearing went on all the way. Seems to be running just right, as it runs at the same temp, as the other 3. The bearing should just slip on, with hand pressure, only. If you have to hammer, it's too tight.
 

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