The Timken Company T139W Thrust Roller Bearing

Description:

The Timken T139W tapered thrust roller bearing is used to support heavy unidirectional axial loads in industrial power transmission systems, gear drives, and heavy-duty machinery. Commonly installed in rolling mills, industrial gearboxes, mining equipment, machine tools, and construction equipment where high thrust load capacity and precise axial shaft positioning are required. Maintenance teams, OEMs, and system integrators use this bearing for replacement, repair, retrofit, and equipment overhaul to restore dependable thrust load performance and maximize equipment reliability.

Applications:

The Timken T139W is a TTSP tapered thrust roller bearing featuring a retainer with oil holes (W designation) to improve lubrication and support reliable operation under demanding conditions. It is widely used in heavy industrial machinery, steel processing equipment, mining systems, power transmission assemblies, presses, and other applications requiring exceptional axial load capacity, reduced friction, and long service life.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): T139W (T139W-904A2)
• Product Type: Tapered thrust roller bearing
• Bearing Type: TTSP tapered thrust roller bearing
• Bore Diameter (ID): 1.385 in (35.179 mm)
• Outside Diameter (OD): 2.3125 in (58.738 mm)
• Overall Width: 0.625 in (15.875 mm)
• Rolling Elements: Tapered rollers
• Load Direction: Single-direction axial (thrust) load
• Oil Holes in Retainer: Yes (W designation)
• Maximum Shaft Fillet Radius: 0.030 in (0.8 mm)
• Steering Pivot Rating: 4,800 lbf (21,400 N)
• Bearing Weight: 0.3 lb (0.2 kg)
• Bearing Material: High-quality bearing steel
• Lubrication: Oil or grease compatible
• Bearing Design: Separable assembly

Common Replacements:

• Timken T139
• Timken T139W-904A2
• SKF tapered thrust roller bearing equivalent