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Sprocket Size: 120F40
120A9 sprockets with a stock bore comes with a 1-1/4" inside diameter plain hole and can be easily machine bored to custom sizes
and precision 60 tooth sprocket that is manufactured to accept a 4040 bushing
Sprocket Size: 140F23
6301 Ball Bearing | 6301 Bearing - 12x37x12 Floating Chain Tensioner Sprocket Size: 120F40This 6301 ball bearing is a high precision premium quality deep groove 12x37x12 ball bearing made to ABEC 3 precision standards from AXIS. What sets this 6301 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 standard ABEC 1
