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TIR tolerance of conveyor roll

TIR tolerance of conveyor roll

TIR tolerance of conveyor roll

(OP)
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?   

RE: TIR tolerance of conveyor roll

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

 

Mike Halloran
Pembroke Pines, FL, USA

RE: TIR tolerance of conveyor roll

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.

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