Timken HM256849D-90056 Tapered Roller Bearing

Description:

The Timken HM256849D-90056 tapered roller bearing is a complete TDI (Tapered Double Inner) bearing assembly featuring a double cone with matched cups and spacer, designed to support extremely high combined radial and axial loads in heavy-duty industrial rotating equipment. Commonly installed in rolling mills, industrial gearboxes, mining equipment, marine propulsion systems, and large power transmission assemblies where maximum rigidity, load capacity, and precise shaft positioning are required. Maintenance teams, OEMs, and system integrators use this complete bearing assembly for equipment repair, replacement, major rebuilds, and heavy-duty drivetrain retrofits.

Applications:

The Timken HM256849D-90056 complete tapered roller bearing assembly is engineered for demanding industrial applications requiring exceptional load capacity, accurate shaft alignment, and extended service life. It is widely used in rolling mills, mining and aggregate equipment, heavy-duty conveyors, industrial gear reducers, marine drive systems, and other large rotating machinery where a preset TDI bearing assembly provides reliable performance under severe combined radial and axial loading conditions.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): HM256849D-90056
• Product Type: Complete tapered roller bearing assembly
• Bearing Type: TDI (Tapered Double Inner) assembly
• Series: HM256800
• Bore Diameter (ID): 11.8125 in (300.038 mm)
• Outside Diameter (OD): 16.6250 in (422.275 mm)
• Bearing Width (T): 5.9375 in (150.813 mm)
• Double Cone Width (B): 5.9375 in (150.813 mm)
• Outer Ring Width (C): 2.5000 in (63.500 mm)
• Cage Type: Pin-type cage
• Material: High-grade bearing steel
• Load Type: Combined radial and axial loads
• Dynamic Radial Load Rating (C1): 508,000 lbf (2,260,000 N)
• Static Radial Load Rating (C0): 622,000 lbf (2,770,000 N)
• Maximum Shaft Fillet Radius: 0.250 in (6.40 mm)
• Compatible Cup: Timken HM256810
• Design: Preset complete TDI bearing assembly with spacer (90056 configuration)

Common Replacements:

• Timken HM256849D/HM256810 bearing assembly
• Timken HM256849DA/HM256810 bearing assembly
• Timken HM256849D-90056 preset assembly equivalent