Part Number: Y 28 L With Seals: D +.001/-.000: 0.8750 Inside Diameter Nominal: 1/4 B +.005/-.010: 0.5625 H Oil Hole: 0.093 Speed Limit [rpm]: 3930 Min Boss Dia.: 0.50 Approx Weight [lbs]: 0.067 Roller B +.000/-.001: 0.500 Roller CR: 10 D Min.: 0.2496 D Max.: 0.2502 Nominal Size: 7/8 Bearing Dynamic Capacity C [lbf] 1: 1800 Bearing Static Capacity Co [lbf] 2: 4150 Track Capacity at 40 Rc [lbf]: 1030 Trans Fit Max [lbf]: 0.2497 Trans Fit Min: 0.2493 Press Fit Max: 0.2505 Press Fit Min: 0.2501