KML Tapered Bearing Set, 3.25"X5.115"X1.4375"

The 580/572 (Set401) KML Tapered Bearing Set is an inch-series tapered roller bearing and cup set designed to handle combined radial and thrust loads in heavy-duty rotating applications. This matched assembly includes the 580 cone and 572 cup with a stamped steel cage, and is commonly referenced as Set401 for convenient ordering and replacement.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 580/572 (Set401)
• Brand: KML
• Series: 575
• Product Type: Tapered bearing set (cone + cup)
• Design Unit: Inch
• Cage Material: Stamped steel
• Cone Part Number: 580
• Cup Part Number: 572
• Bore (d): 3-1/4 in (82.550 mm)
• Cup Outer Diameter (D): 5.5115 in (139.992 mm)
• Cone Width (B): 1.4212 in (36.098 mm)
• Cup Width (C): 1.1250 in (28.575 mm)
• Total Bearing Width (T): 1.4375 in (36.513 mm)
• Cone Backface “To Clear” Radius (R): 0.14 in (3.600 mm)
• Cup Backface “To Clear” Radius (r): 0.130 in (3.30 mm)
• Basic Load Ratings (as provided):
  • Dynamic Radial Rating (C90): 12,100 lbf (53,600 N)
  • Dynamic Radial Rating (C1): 46,500 lbf (207,000 N)
  • Static Radial Rating (C0): 65,400 lbf (291,000 N)
  • Dynamic Thrust Rating (Ca90): 8,330 lbf (37,100 N)
• Related Assembly Numbers (as provided): 580-90053, 580-90054, 580-902B2, 580-902B3, 580-902B4, 580-902C2, 580-90406, 580-906B1, KIT3948, 18-90000

Ideal For

• Applications needing a tapered roller bearing for radial + thrust load support
• Replacement work where Set401 / 580 cone / 572 cup is specified
• Heavy-duty hubs, spindles, and rotating assemblies using a 3-1/4" bore
• Equipment service and maintenance requiring inch-dimension bearing sets