The Timken Company T189W Tapered Thrust Bearing

Description:

The Timken T189W 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, machine tools, construction equipment, and other applications requiring high thrust load capacity and precise axial shaft positioning. Maintenance teams, OEMs, and system integrators use this bearing for replacement, repair, retrofit, and equipment overhaul to restore reliable thrust load performance and extend equipment service life.

Applications:

The Timken T189W is a TTCS-style tapered thrust roller bearing featuring a retainer with oil holes to improve lubrication under demanding operating conditions. It is widely used in mining equipment, steel mills, heavy industrial machinery, gear drives, presses, and power transmission systems where high axial load capacity, durability, and long service life are essential.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): T189W (T189W-904A2)
• Product Type: Tapered thrust roller bearing
• Bearing Type: TTCS tapered thrust roller bearing
• Bore Diameter (ID): 1.885 in (47.879 mm)
• Outside Diameter (OD): 3.266 in (82.956 mm)
• Overall Width: 0.9063 in (23.020 mm)
• Maximum Shaft Fillet Radius: 0.030 in (0.8 mm)
• Oil Holes in Retainer: Yes (W designation)
• Rolling Elements: Tapered rollers
• Load Direction: Single-direction axial (thrust) load
• Steering Pivot Rating: 14,300 lbf (64,000 N)
• Bearing Weight: 1.1 lb (0.5 kg)
• Bearing Material: High-quality bearing steel
• Lubrication: Oil or grease compatible

Common Replacements:

• Timken T189
• Timken T189W-904A2
• SKF tapered thrust roller bearing equivalent