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140A31 sprockets with a stock bore comes with a 1-1/2" inside diameter plain hole and can be easily machine bored to custom sizes
What sets this 6306-ZZ bearing apart from others is the ABEC 3 precision standard that this bearing is made to
Inside Width (W): 1
Part Number: #200U30
Dimension (Y): 2-5/16"
6311-ZZ Ball Bearing | 6311-ZZ Bearing - 55x120x29 6000 Series Deep Groove Ball Bearings 140A31 sprockets with a stockThis 6311 ZZ ball bearing is a high precision premium quality deep groove shielded 55x120x29 ball bearing made to ABEC 3 precision standards from AXIS. What sets this 6311 ZZ bearing apart from others is the ABEC 3 precision standard that this bearing is made to, the grade 10 balls used, and the superb electric motor quality rating (EMQ). ABEC 3 means that the bearing itself has a micron deviation from a nominal of 20. 000mm of 8 micrometers. The
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