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
M257248DW
M257200
304.902 mm
128.588 mm
1120000 N
2140000 N
M652949DW
M652900
279.4 mm
127.000 mm
1190000 N
1830000 N
M260149DW
M260100
330.200 mm
144.463 mm
1220000 N
2750000 N
M667944DW
M667900
406.400 mm
161.925 mm
1870000 N
3940000 N
M262449D
M262400
347.663 mm
138.113 mm
1570000 N
2680000 N
M667946DW
M667900
409.575 mm
161.925 mm
1870000 N
3940000 N
M262449DW
M262400
347.663 mm
138.113 mm
1430000 N
2680000 N
M667947ADW
M667900
409.575 mm
161.925 mm
1690000 N
3420000 N
M268748D
M268700
415.925 mm
209.550 mm
2860000 N
5550000 N
M667947DGW
M667900
409.575 mm
161.925 mm
1690000 N
3420000 N
M268749DGW
M268700
415.925 mm
209.550 mm
2860000 N
5550000 N
M667947DW
M667900
409.575 mm
161.925 mm
1690000 N
3420000 N
M268749DW
M268700
415.925 mm
209.550 mm
2860000 N
5550000 N
M667949D
M667900
409.575 mm
161.925 mm
1870000 N
3940000 N
M270749ADW
M270700
447.675 mm
223.838 mm
3280000 N
6430000 N
M667949DXX
M667900
409.575 mm
161.925 mm
1870000 N
3940000 N
M270749D
M270700
447.675 mm
223.838 mm
3280000 N
6430000 N
M757447D
M757400
304.648 mm
128.588 mm
1100000 N
2050000 N
M270749DGW
M270700
447.675 mm
223.838 mm
3280000 N
6430000 N
M252349DW
M252300
269.875 mm
136.525 mm
1150000 N
2030000 N