Torrington IR-242820 Needle Roller Bearing Inner Ring

Description:

The Torrington IR-242820 needle roller bearing inner ring is a precision-hardened inner race designed for use with heavy-duty needle roller bearings when the shaft cannot serve as the bearing raceway. Commonly installed in industrial gearboxes, transmissions, hydraulic equipment, machine tools, agricultural machinery, and power transmission systems where compact, high-load bearing arrangements are required. Maintenance teams, OEMs, and system integrators use this inner ring for equipment repair, bearing replacement, machine rebuilds, and drivetrain retrofits to provide a hardened, wear-resistant running surface for needle rollers.

Applications:

The Torrington IR-242820 needle roller bearing inner ring is engineered for demanding industrial applications requiring a precision-ground raceway and high wear resistance. It is widely used with heavy-duty caged needle roller bearings in industrial gear reducers, conveyors, hydraulic systems, pumps, construction equipment, agricultural machinery, and other rotating equipment where a hardened shaft is impractical. It is commonly paired with HJ-283720 series needle roller bearings.

Technical Specifications:

• Manufacturer: Torrington (now part of Timken)
• Manufacturer Part Number (MPN): IR-242820
• Product Type: Needle roller bearing inner ring
• Series: IR Inch Series
• Bore Diameter (ID): 1.5000 in (38.100 mm)
• Outside Diameter (OD): 1.7500 in (44.450 mm)
• Width: 1.2500 in (31.750 mm)
• Material: Hardened high carbon chrome steel
• Raceway: Precision-ground and hardened
• Bearing Type: Separable inner ring for heavy-duty needle roller bearings
• Compatible Bearing: HJ-283720 heavy-duty needle roller bearing
• Minimum Chamfer Radius: 0.060 in (1.52 mm)
• Weight: 0.095 kg (0.21 lb)

Common Replacements:

• Timken IR-242820
• Koyo IR-242820
• INA PI 242820