**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.*
Part Number | Series | d - Cone Bore | B - Double Cone Width | C1 - Dynamic Radial Rating(1 million revolutions) | C0 - Static Radial Rating |
---|---|---|---|---|---|
M257200 |
304.902 mm |
128.588 mm |
1120000 N |
2140000 N |
|
M652900 |
279.4 mm |
127.000 mm |
1190000 N |
1830000 N |
|
M260100 |
330.200 mm |
144.463 mm |
1220000 N |
2750000 N |
|
M667900 |
406.400 mm |
161.925 mm |
1870000 N |
3940000 N |
|
M262400 |
347.663 mm |
138.113 mm |
1570000 N |
2680000 N |
|
M667900 |
409.575 mm |
161.925 mm |
1870000 N |
3940000 N |
|
M262400 |
347.663 mm |
138.113 mm |
1430000 N |
2680000 N |
|
M667900 |
409.575 mm |
161.925 mm |
1690000 N |
3420000 N |
|
M268700 |
415.925 mm |
209.550 mm |
2860000 N |
5550000 N |
|
M667900 |
409.575 mm |
161.925 mm |
1690000 N |
3420000 N |
|
M268700 |
415.925 mm |
209.550 mm |
2860000 N |
5550000 N |
|
M667900 |
409.575 mm |
161.925 mm |
1690000 N |
3420000 N |
|
M268700 |
415.925 mm |
209.550 mm |
2860000 N |
5550000 N |
|
M667900 |
409.575 mm |
161.925 mm |
1870000 N |
3940000 N |
|
M270700 |
447.675 mm |
223.838 mm |
3280000 N |
6430000 N |
|
M667900 |
409.575 mm |
161.925 mm |
1870000 N |
3940000 N |
|
M270700 |
447.675 mm |
223.838 mm |
3280000 N |
6430000 N |
|
M757400 |
304.648 mm |
128.588 mm |
1100000 N |
2050000 N |
|
M270700 |
447.675 mm |
223.838 mm |
3280000 N |
6430000 N |
|
M252300 |
269.875 mm |
136.525 mm |
1150000 N |
2030000 N |