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Bearing collar

C

craigco

Member
On the 490 haybine a bearing on the conditioner roller needs replaced. What's the best way to get the bearing collar off? Removed set screw and it still won't move. Can order a new collar and cut the old one off. But will have to wait for it to ship. Have the bearing on hand.
 
Hi Craigco

If the lock collar is eccentric grab what we Aussies call a stilson or I think you call a pipe wrench and turn it to loosen. Check direction of rotation on the new bearing you have. By doing this you may be able to reuse the lock collar with the new bearing. If not use a punch in the set screw hole and drive it in the direction to loosen same idea as the wrench only destructive for the collar.
 
There should be a hole separate from the set screw hole to put a punch or dull chisel in,then use a hammer to hit it and turn it the direction opposite of normal rotation.
 
If it is an eccentric collar it should be locked in the same direction the shaft turns. There should be a hole besides the set screw hole to use a spanner or a drift punch.
 
Eccentric collars have a second hole on the OD. Use a drift punch and small hammer. Those collars are tightened in the direction of the shaft rotation so go opposite the rotation. Even with the collar off the bearing bore may still be stuck.
 
Had to heat one with acetylene torch this week. Did not have to get it real hot, it then moved easy. Would not budge with punch when cold. Was a 1 3/8" pick up shaft on a round baler. Even had to heat around set screw to get it to move. Had to cut inner bearing race with torch also. If you have to do that, cut at a tangent to the shaft, or it will blow right back at you.

Garry
 
I know you're supposed to put the collars on so they "tighten" as the shaft turns, but some time ago, Dad and I decided to put them on as if we were tightening a nut. It seemed easier than trying to remember which way the shaft turned! We did many bearings on the old 141 IH combine that way, and we never had one come loose.
And if we had to change one it was easy to remember which way to turn to remove, just "unscrew" it!!
 
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