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
M667946DW
M667900
409.575 mm
161.925 mm
1870000 N
3940000 N
M667947ADW
M667900
409.575 mm
161.925 mm
1690000 N
3420000 N
M667947DGW
M667900
409.575 mm
161.925 mm
1690000 N
3420000 N
M667947DW
M667900
409.575 mm
161.925 mm
1690000 N
3420000 N
M667949D
M667900
409.575 mm
161.925 mm
1870000 N
3940000 N
M667949DXX
M667900
409.575 mm
161.925 mm
1870000 N
3940000 N
M757447D
M757400
304.648 mm
128.588 mm
1100000 N
2050000 N
LM258648DW
LM258600
317.500 mm
128.588 mm
986000 N
2230000 N
LM258649D
LM258600
317.500 mm
128.588 mm
986000 N
2230000 N
LM263149D
LM263100
355.6 mm
120.650 mm
941000 N
2270000 N
LM263149DW
LM263100
355.6 mm
120.650 mm
941000 N
2270000 N
LM272249DW
LM272200
482.600 mm
158.750 mm
1690000 N
4100000 N
LM278848D
LM278800
585.788 mm
230.188 mm
3290000 N
8280000 N
LM282549D
LM282500
708.025 mm
273.050 mm
4630000 N
12000000 N
LM287649D
LM287600
938.213 mm
400.050 mm
9120000 N
23600000 N
LM451349D
LM451300
266.7 mm
109.538 mm
701000 N
1510000 N
LM451349DGW
LM451300
266.7 mm
109.538 mm
701000 N
1510000 N
LM451349DW
LM451300
266.7 mm
109.538 mm
701000 N
1510000 N
LM451349DWX
LM451300
266.7 mm
109.538 mm
864000 N
1510000 N
LM654640D
LM654600
273.050 mm
117.475 mm
722000 N
1720000 N
LM654644D
LM654600
279.578 mm
117.475 mm
722000 N
1720000 N
LM654648DW
LM654600
285.750 mm
117.475 mm
722000 N
1720000 N
LM665949DGW
LM665900
385.763 mm
152.400 mm
1350000 N
3160000 N
LM665949DW
LM665900
385.763 mm
152.400 mm
1350000 N
3160000 N