the R10-ZZ bearing features raceways that are precision honed to a superb finish
UCFB207-20 Bearing Dimensions
Sprocket Size: 100A12
UC211-32 bearing is a normal-duty ball bearing insert made to C3 precision standards and utilizes set screws for securing a 2" shaft
2BK28 Pulley 5/8" Bore 0.375" Stock Bore the R10-ZZ bearing features racewaysThis 2BK28 Pulley 5 8" bore is directly interchangeable with other manufacturers v belt pulleys, it is 2. 95" in diameter, and is manufactured in accordance with ARPM Standard IP20 for safe operation. double BK pulleys work with belt types A, 4L, B, 5L, AX, BX, AA, BB, double banded A, double banded B, and double banded BX cogged v belts. What separates this double 2BK28 pulley from the others is that it is made using a high grade 35 cast iron, is