NSK Cylindrical Roller Bearings, Single Row NU Type, NU304W ,D=20 Star Key Set Wing Type Item # Clamping Capacity Spreading ELMETRON Coating Thickness Gauge Item # Clamping Capacity Spreading Capacity Throat Depth 212 1006 506QCN 6" (15 cm) 7 1 2" 13 3 8" (196 mm 338 mm) 3 1 4" (81 mm) 212 1015 512QCN 12" (30 cm) 7 1 2" 19 1 4" (196 mm 488 mm) 3 1 4" (81 mm) 212 1024 518QCN 18" (45 cm) 7 1 2" 25 1 4" (196 mm 640 mm) 3 1 4" (81 mm) 212 1033 524QCN 24" (60 cm) 7 1 2" 31 1 4" (196 mm 793 mm) 3 1 4" (81 mm) 212 1042 536QCN 36" (91 cm) 7 1 2" 43 1 4" (196 mm 1097 mm) 3 1 4" (81 mm) making it easy to insert cables into the cutting area in such a case Bearing bore 01 : 12mm