BK25 Pulley 1/2" Bore filter_H50BS55 insures proper contact between the

insures proper contact between the #80 roller chain and sprocket thus preventing premature wear or breakage

This 50BS53 sprocket features a 1-3/4" finished bore including a key-way and two setscrews

the SBPF201-8 1/2" bearing has incredible holding power and stability

Insert Bearing #: SB206

This BK45 Pulley 3/4" bore is directly interchangeable with other manufacturers

BK25 Pulley 1/2" Bore filter_H50BS55 insures proper contact between theThis BK25 Pulley 1 2" bore is directly interchangeable with other manufacturers, is 2. 50" in diameter, and is manufactured in accordance with ARPM Standard IP20 for safe operation. It works with belt sizes A, 4L, B, 5L, AX, BX, AA, and BB. What separates this BK25 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 iron offers a higher tensile