This 10C300M Sheave uses a M QD bushing
Dimension (F): 56
This 6804-ZZ ball bearing is a high-precision premium quality deep groove shielded 20x32x7 ball bearing made to ABEC 3 precision standards from AXIS
This 2060B13 sprocket is durable
For more information on a single groove 1C120SF sheave
BK52H Pulley single-groove 4.95" OD 24-Tooth Sprocket This 10C300M Sheave uses aThis BK52H Pulley uses an H Series Bushing, is directly interchangeable with other manufacturers, is 4. 95" in diameter, and is manufactured in accordance with ARPM Standard IP20 for safe operation. With AK series pulleys you can use A, 4L, B, 5L, AX, BX, AA, and BB belts. What separates this BK52H 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 grade 35