TIR tolerance of conveyor roll

[rinkman11]

Hello all,
Here is your diagram. A-----------B A is a bearing journal with a 2.00" dia. and a 2" length. This A journal has a TIR tolerance of .005 back to the B bearing journal also a 2.00" dia.2.00" length journal. The broken line between A & B is a 6" dia. roller. The roller length between A & B is 120". The tolerance of A(journal) & B(journal to the broken lines(roller)is .005. If A and B have .005 TIR each and have opposite highs, what would be the TIR of A back to B. Consider the roller as having a TIR of "0". Also, When A and B journals are assembled to housings, won't any TIR in the journals shift to the roller?

 

[MikeHalloran]

Conveyor rolls are nearly always supported by really cheap ball bearings that are loose enough to self-align.



Mike Halloran
Pembroke Pines, FL, USA

 

[dvd]

6" pulley x 120" long sounds kind of suspicious, depending on conveyor length. Is this a head pulley, in addition? Are you experiencing belt tracking problems?

I agree with self-aligning bearings.