the three mounting holes provide excellent stability and control for the mounted bearing
Something that sets this 2040B21 sprocket apart from others is that it is Black Oxide Finished
HCFS212-39 Bearing Dimensions
Part #: UCST 205-15
Our HC210-30 insert bearing has several features: a wide inner-ring
2TB38 Sheave two-groove 4.15" OD 1C QD Bushed Sheaves the three mounting holes provideThis 2TB38 Pulley uses a P1 Series Bushing, is directly interchangeable with other manufacturers, is 4. 15" 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 2TB38 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 cast