Tapered Roller Bearings – TDO (Tapered Double Outer) Imperial

Tapered Roller Bearings Product Introduction

**TIMKEN Tapered Roller Bearings – TDO (Tapered Double Outer) Series: Superior Load Handling for Demanding Applications**

TIMKEN Tapered Roller Bearings are renowned for their exceptional durability, precision, and ability to manage combined radial and axial loads in high-performance industrial and automotive systems. Among TIMKEN’s extensive bearing portfolio, the **TDO (Tapered Double Outer) series**, including both metric (0) and imperial (2093) designs, stands out for its robust construction and versatility in heavy-load applications. These bearings are engineered to deliver unmatched reliability in environments where extreme forces, misalignment, or variable speeds are common.

### **Technical Features & Design Advantages**
The **TDO tapered roller bearings** feature a unique double outer ring and single inner ring configuration, enabling them to accommodate substantial radial and thrust loads in both directions. This design is particularly beneficial in applications where space constraints or shaft deflection might otherwise compromise performance. Key features include:

– **Optimized Load Distribution**: The tapered rollers are precision-ground to ensure even load sharing, reducing stress concentrations and extending service life.
– **Enhanced Rigidity**: The double-cup (outer ring) design increases stiffness, making these bearings ideal for applications with high moment loads or shaft misalignment.
– **Superior Lubrication Retention**: Advanced sealing options and optimized internal geometries help maintain consistent lubrication, even in harsh operating conditions.
– **Interchangeability & Standardization**: Available in both metric (0-series) and imperial (2093-series) sizes, TIMKEN TDO bearings are designed to replace competitor units seamlessly while offering improved performance.

### **Performance Benefits**
TIMKEN’s TDO tapered roller bearings excel in applications requiring high load capacity, shock resistance, and long-term reliability. Their ability to handle **combined axial and radial loads** makes them indispensable in heavy machinery, while their precision ensures smooth operation in high-speed scenarios. Additional advantages include:

– **Extended Bearing Life**: Advanced steel alloys and heat treatment processes enhance fatigue resistance, reducing downtime and maintenance costs.
– **Reduced Friction & Heat Generation**: Precision-engineered roller profiles minimize friction, improving efficiency and reducing energy consumption.
– **Versatility Across Industries**: Suitable for both slow, heavy-load applications (e.g., mining equipment) and high-speed operations (e.g., gearboxes).

### **Typical Applications**
TIMKEN TDO tapered roller bearings are widely used in industries where reliability under extreme conditions is critical. Common applications include:

– **Industrial Machinery**: Conveyor systems, crushers, and heavy-duty gearboxes requiring high radial and thrust load support.
– **Automotive & Transportation**: Wheel hubs, differential systems, and truck axles where durability and load management are essential.
– **Precision Equipment**: Machine tool spindles and rolling mills where alignment accuracy and minimal deflection are crucial.

For engineers and maintenance professionals seeking a robust, high-performance bearing solution, TIMKEN’s TDO series offers a proven combination of strength, precision, and longevity—ensuring optimal performance in the most demanding environments.

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Part Number Series d - Bore D - Cup Outer Diameter B - Cone Width C - Double Cup Width T - Bearing Width across Cones C90 - Dynamic Radial Rating (One-Row, 90 million revolutions) C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)
25590 - 25520D
25500
45.618 mm
82.931 mm
25.400 mm
47.625 mm
57.150 mm
23500 N
158000 N
24780 - 24720D
24700
41.275 mm
76.2 mm
23.02 mm
39.688 mm
49.210 mm
19600 N
132000 N
2581 - 2524YD
2500
33.338 mm
69.850 mm
25.357 mm
57.150 mm
66.675 mm
21700 N
146000 N
25582 - 25520D
25500
44.450 mm
82.931 mm
25.400 mm
47.625 mm
57.150 mm
23500 N
158000 N
24781 - 24720D
24700
41.275 mm
76.2 mm
23.02 mm
39.688 mm
49.210 mm
19600 N
132000 N
2578 - 2524YD
2500
28.575 mm
69.850 mm
25.357 mm
57.150 mm
66.675 mm
21700 N
146000 N
25578 - 25520DC
25500
42.863 mm
82.931 mm
25.400 mm
47.625 mm
57.150 mm
23500 N
158000 N
24781 - 24720XD
24700
41.275 mm
76.2 mm
23.02 mm
39.688 mm
49.210 mm
19600 N
132000 N
2558 - 2524YD
2500
30.163 mm
69.850 mm
25.357 mm
57.150 mm
66.675 mm
21700 N
146000 N
25582 - 25520DC
25500
44.450 mm
82.931 mm
25.400 mm
47.625 mm
57.150 mm
23500 N
158000 N
2581 - 2523D
2500
33.338 mm
69.850 mm
25.357 mm
57.150 mm
66.675 mm
21700 N
146000 N
2580 - 2524YD
2500
31.750 mm
69.850 mm
25.357 mm
57.150 mm
66.675 mm
21700 N
146000 N
25583 - 25520DC
25500
44.450 mm
82.931 mm
35.878 mm
47.625 mm
78.105 mm
23500 N
158000 N
EE234154 - 234213CD
234000
393.7 mm
539.750 mm
61.120 mm
101.600 mm
142.872 mm
282000 N
1890000 N
EE234160 - 234221DC
234000
406.400 mm
558.800 mm
61.120 mm
104.775 mm
146.047 mm
282000 N
1890000 N
EE234160W - 234216D
234000
406.400 mm
546.1 mm
61.120 mm
117.475 mm
158.747 mm
282000 N
1890000 N
EE234160W - 234221DC
234000
406.400 mm
558.800 mm
61.120 mm
104.775 mm
146.047 mm
282000 N
1890000 N
EE234156W - 234216D
234000
396.875 mm
546.1 mm
61.120 mm
117.475 mm
158.747 mm
282000 N
1890000 N
EE234156 - 234221DC
234000
396.875 mm
558.800 mm
61.120 mm
104.775 mm
146.047 mm
282000 N
1890000 N
21063 - 21226D
21000
15.875 mm
57.150 mm
21.839 mm
36.513 mm
49.213 mm
14300 N
95900 N