weistec idle pulley bearing number??
11-29-2020, 01:25 PM
#1
Senior Member
Thread Starter
weistec idle pulley bearing number??
hi guys need a new bearing for my weistec idle pulley , I think that bearing was replaced in the past so not sure it has the right one.
anyone know the skf part number?
thanks
anyone know the skf part number?
thanks
11-29-2020, 01:59 PM
#2
Senior Member
The part numbers will be more or less the same. Bearings are numbered the same pretty much with the exception of their prefixes and suffixes. All that would mean are the types of shielding or sealing that they have.
In other words, a 6208 will be the same bearing regardless of who made it.
I don’t have a set of the weistec pulleys, so I can’t tell you what they used.
Pretty much all you need are the dimensions of the bearing- OD, ID, and Width, then to cross reference. They are single row deep groove ball bearings.
With regard for sealing arrangements, you want sealed (as opposed to shielded or open) ones rated for high speed. The difference is how tightly the seal fits around the thing it’s sealing.
High speed bearings have a loose fit to allow for heat expansion.
I would avoid ceramic bearings as they don’t like impact or vibration very much.
Pretty much any Japanese made or German made bearing is a good bet. ***, Nachii, and INA are also good manufacturers.
The reason these don’t last is because bearings are meant to work in pairs. Single row deep groove ball bearings don’t deal with angular moment of inertia very well. In any case they will not last forever because of this.
So if someone could design these pulleys to use pairs of bearings instead of singles, problem over. Something to think about perhaps. If only I had a CNC lathe.
In other words, a 6208 will be the same bearing regardless of who made it.
I don’t have a set of the weistec pulleys, so I can’t tell you what they used.
Pretty much all you need are the dimensions of the bearing- OD, ID, and Width, then to cross reference. They are single row deep groove ball bearings.
With regard for sealing arrangements, you want sealed (as opposed to shielded or open) ones rated for high speed. The difference is how tightly the seal fits around the thing it’s sealing.
High speed bearings have a loose fit to allow for heat expansion.
I would avoid ceramic bearings as they don’t like impact or vibration very much.
Pretty much any Japanese made or German made bearing is a good bet. ***, Nachii, and INA are also good manufacturers.
The reason these don’t last is because bearings are meant to work in pairs. Single row deep groove ball bearings don’t deal with angular moment of inertia very well. In any case they will not last forever because of this.
So if someone could design these pulleys to use pairs of bearings instead of singles, problem over. Something to think about perhaps. If only I had a CNC lathe.
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