Info:Martin 2050B24 Type B Single Strand Double Pitch Reboreable Roller Chain Sprocket, 3/4 to 2 in Dia Bore, 5.12 in OD, #2050 Chain, 24 Teeth, 1-1/4 in Pitch, Steel
Info:Rex® 2050MMU 2000 Normal Duty Unmounted Spherical Roller Insert Bearing, 50 mm Dia Bore, 3.5438 in OD, 1.53 in W, 128509 N Dynamic/147681 N Static Load