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100R21 sprockets are bored to accept a R1 type taper bushing
UEP207-20 bearing is a two-bolt normal duty pillow block bearing with a 1-1/4" bore
Sprocket Size: 100Q35
120BS21 1 1/4" Finished Bore Sprocket Dimensions
including the TXT305
3TB74 Sheave three-groove 7.75" OD 212B Metric Roller Chain 100R21 sprockets are bored toThis 3TB74 Pulley uses a Q1 series bushing, is directly interchangeable with other manufacturers, is 7. 75" in diameter, and is manufactured in accordance with ARPM Standard for safe operation. With B series TB pulleys you can use A, 4L, B, 5L, AX, BX, AA, and BB belts. What separates this three groove 3TB74 pulley from the others is that it is made using a high grade 35 cast iron, is phosphate coated, painted, and balanced at the factory. Using the
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