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
HH249949D
HH249900
247.650 mm
219.075 mm
1960000 N
3770000 N
EE430901D
430000
228.600 mm
161.925 mm
1120000 N
1920000 N
EE823103D
823000
260.350 mm
196.850 mm
1610000 N
2670000 N
HH255149D
HH255100
279.4 mm
244.475 mm
2620000 N
4820000 N
EE433301D
433000
762.000 mm
311.150 mm
7440000 N
15200000 N
EE833161XD
833000
406.400 mm
193.675 mm
2310000 N
4770000 N
HH258249D
HH258200
303.213 mm
263.525 mm
2870000 N
5650000 N
EE435103D
435000
260.350 mm
155.575 mm
1120000 N
2010000 N
EE91700D
91000
177.800 mm
106.363 mm
490000 N
723000 N
HM237542D
HM237500
174.625 mm
123.825 mm
824000 N
1240000 N
EE450600D
450000
152.400 mm
171.450 mm
994000 N
1480000 N
EE921150D
920000
292.100 mm
142.875 mm
1510000 N
1990000 N
HM237546D
HM237500
177.800 mm
123.825 mm
824000 N
1240000 N
EE480181D
480000
457.200 mm
368.300 mm
6190000 N
8790000 N
EE941206D
940000
304.8 mm
134.938 mm
1550000 N
2090000 N
HM237546DD
HM237500
177.800 mm
158.750 mm
824000 N
1240000 N
EE526131D
526000
330.200 mm
147.638 mm
1250000 N
2320000 N
EE941207D
940000
304.8 mm
141.288 mm
1550000 N
2090000 N
HM252340D
HM252300
250.825 mm
139.700 mm
1500000 N
2020000 N
EE529090DW
529000
228.600 mm
139.700 mm
1110000 N
1830000 N