Tapered Roller Bearings – Double Tapered Cones – Imperial

Tapered Roller Bearings Product Introduction

**TIMKEN Tapered Roller Bearings – Double Cones (Imperial Series 271): Engineered for Heavy-Duty Performance**

For over a century, TIMKEN has set the global standard for tapered roller bearing technology, delivering unmatched reliability in the most demanding industrial and automotive applications. Among its robust portfolio, the **TIMKEN Double Tapered Cones (Imperial Series 271)** stand out as a high-performance solution designed to handle heavy radial and thrust loads simultaneously. These precision-engineered bearings combine advanced metallurgy, optimized geometry, and rigorous manufacturing tolerances to extend equipment life, reduce maintenance costs, and enhance operational efficiency across critical machinery.

### **Technical Features & Design Advantages**
The **Series 271 Double Tapered Cones** are crafted for applications requiring superior load distribution and alignment flexibility. Key features include:

– **Dual-Row Design**: Two independent cone assemblies enable balanced load sharing, accommodating combined radial and axial forces in a compact footprint.
– **Premium Steel Alloys**: Manufactured from ultra-clean, case-hardened steel for exceptional fatigue resistance and durability under shock loads or high-speed conditions.
– **Precision Ground Surfaces**: Optimized roller profiles and raceway finishes minimize friction, heat generation, and wear, even in misalignment scenarios.
– **Interchangeability**: Conforms to imperial dimensions for seamless integration with existing systems, reducing downtime during replacements.
– **Sealing & Lubrication Options**: Compatible with TIMKEN’s advanced sealing solutions (e.g., labyrinth or contact seals) and specialty greases for contaminated environments.

### **Performance Benefits**
TIMKEN’s double cones excel where single-row bearings fall short, offering:
– **Higher Load Capacity**: The dual-row configuration distributes loads evenly, making them ideal for applications with oscillating or variable force directions.
– **Extended Service Life**: Reduced stress concentrations and improved lubrication retention lead to longer intervals between overhauls.
– **Versatility**: Performs reliably in both slow-speed, high-torque environments (e.g., conveyor pulleys) and high-speed applications (e.g., gearbox systems).

### **Typical Applications**
The **Series 271 Double Tapered Cones** are widely specified in heavy industries, including:
– **Industrial Machinery**: Crushers, extruders, and mining equipment where shock loads and misalignment are common.
– **Automotive Systems**: Wheel hubs, differentials, and drivetrains in commercial vehicles and off-highway equipment.
– **Precision Equipment**: Wind turbine gearboxes, rolling mill stands, and pulp/paper processing machinery requiring sustained performance under extreme conditions.

Engineered to exceed industry benchmarks, TIMKEN’s Double Tapered Roller Bearings deliver the strength, precision, and longevity needed to keep critical systems running smoothly. Whether in harsh environments or precision-driven applications, they represent a proven investment in reduced downtime and total cost of ownership.

*For specific dimensions, load ratings, or customization options, consult TIMKEN’s engineering resources or product catalogs.*

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Part Number Series d - Cone Bore B - Double Cone Width C1 - Dynamic Radial Rating(1 million revolutions) C0 - Static Radial Rating
HM959740DW
HM959700
305.034 mm
200.025 mm
1360000 N
2540000 N
HM259049D
HM259000
317.500 mm
158.750 mm
1680000 N
3140000 N
HM959741DW
HM959700
305.034 mm
200.025 mm
1360000 N
2540000 N
HM259049DH
HM259000
317.500 mm
158.750 mm
1680000 N
3140000 N
HM959744DW
HM959700
305.156 mm
200.025 mm
1430000 N
2720000 N
HM259049DV
HM259000
317.500 mm
158.750 mm
1680000 N
3140000 N
L217845D
L217800
85.725 mm
44.45 mm
92600 N
156000 N
HM259049DW
HM259000
317.500 mm
158.750 mm
1680000 N
3140000 N
L281149D
L281100
660.400 mm
176.213 mm
2730000 N
6620000 N
HM261049DW
HM261000
333.375 mm
166.688 mm
1600000 N
3460000 N
L540049D
L540000
196.850 mm
52.390 mm
211000 N
408000 N
HM261049DWH
HM261000
333.375 mm
166.688 mm
1690000 N
3070000 N
LM119348D
LM119300
95.250 mm
57.150 mm
140000 N
227000 N
HM252347D
HM252300
260.350 mm
139.700 mm
1500000 N
2020000 N
HM262749D
HM262700
346.075 mm
174.625 mm
1730000 N
3760000 N
LM121948D
LM121900
107.95 mm
65.088 mm
168000 N
312000 N
HM252348D
HM252300
260.350 mm
152.400 mm
1500000 N
2020000 N
HM262749DG
HM262700
346.075 mm
174.625 mm
1730000 N
3760000 N
LM124449DW
LM124400
120.650 mm
72.238 mm
209000 N
379000 N
HM252348DW
HM252300
260.350 mm
152.400 mm
1500000 N
2020000 N