Proper Bearing Selection
Proper Bearing Selection
(OP)
This is my first post here!
I have been working on product development for a customer and because of the NDA there isn't a whole lot I can say about it but the project needs a specific bearing. It must have an eccentric locking collar which would accept roughly a 1/2" bore, originally we went with an ER-201-8 bearing because of the size and the load rating but the issue we are having is that is does not spin freely enough. Ideally, we need a bearing that has the resistance of a rollerblade 608zz bearing but is much larger and can handle higher temps of what a skate wheel would generate. Any help would be greatly appreciated!
I have been working on product development for a customer and because of the NDA there isn't a whole lot I can say about it but the project needs a specific bearing. It must have an eccentric locking collar which would accept roughly a 1/2" bore, originally we went with an ER-201-8 bearing because of the size and the load rating but the issue we are having is that is does not spin freely enough. Ideally, we need a bearing that has the resistance of a rollerblade 608zz bearing but is much larger and can handle higher temps of what a skate wheel would generate. Any help would be greatly appreciated!





RE: Proper Bearing Selection
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Proper Bearing Selection
RE: Proper Bearing Selection
RE: Proper Bearing Selection
Mike Halloran
Pembroke Pines, FL, USA
RE: Proper Bearing Selection
There are also passive solutions, but Earnshaw has objected to that for almost 200 years.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Proper Bearing Selection
I am sorry to hear that.
If the shaft spins and the load is one directional ( like a belt driven fan) keeping the inner race locked to the shaft can be a huge problem. The greater the shaft to bearing clearance ( I'm only talking 0.001 or 0.002" diametral clearance, which commonly results from commercial shafting) , the more likely things are to wiggle loose and destroy each other. Tightening the collar in the direction of rotation is supposedly only enhanced if slippage occurs, but radial forces like belt loads or even gravity with a fat rotor have no problem sliding the shaft radially sideways in the essentially 2 point contact of the eccentric and bearing inner race.