Single Row Ball Bearing; 12MM Bore; 28MM Outside Diameter; 8MM Outer Race Width; 2 Seals; ABEC 1 | ISO P0; No Filling Slot; No Snap Ring; C3-Loose Internal Clearance; Steel Cage

Single Row Ball Bearing; 25MM Bore; 52MM Outside Diameter; 15MM Outer Race Width; 2 Seals; ABEC 1 | ISO P0; No Filling Slot; No Snap Ring; C3-Loose Internal Clearance; Steel Cage

Variable Speed Pulley; 1-1/4" Bore; 2 Grooves; 6-1/2" Outside Diameter; Finished Bore; No Bushing; 1/2" Belt Width Min; 21/32" Belt Width Max; 4L | A | 5L | B | 5V Belt Series; 4.9" Pitch Dia Min; 6.4" Pitch Dia Max; 1-5/8" Face Wid Min; 1-5/8" Face Wid Max; Keyway; Manual Turn Adjustmen