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)
M667948 - M667911DC
M667900
409.575 mm
546.1 mm
87.313 mm
147.638 mm
185.735 mm
438000 N
2940000 N
15125 - 15251D
15000
31.750 mm
63.500 mm
20.638 mm
36.513 mm
46.038 mm
15500 N
104000 N
M919048 - M919010D
M919000
89.980 mm
161.900 mm
30.163 mm
44.450 mm
69.850 mm
52600 N
354000 N
367 - 364XD
365
45.001 mm
90 mm
22.225 mm
42.863 mm
50.800 mm
26400 N
177000 N
NA56425SW - 56650CD
56000
107.95 mm
165.1 mm
44.45 mm
63.5 mm
88.900 mm
58700 N
CAD
385A - 384CD
385
50.8 mm
100 mm
21.946 mm
42.863 mm
52.388 mm
28000 N
188000 N
NA48290SW - 48220D
48200
127 mm
182.563 mm
46.83 mm
73.025 mm
93.66 mm
69400 N
CAD
398 - 394D
395
50.8 mm
110 mm
21.996 mm
46.038 mm
52.388 mm
25600 N
172000 N
NA48685SW - 48620D
48600
142.875 mm
200.025 mm
46.833 mm
73.025 mm
93.665 mm
74300 N
CAD
469 - 452D
455
57.150 mm
107.95 mm
29.317 mm
53.975 mm
65.090 mm
41700 N
280000 N
NA67885SW - 67820CD
67800
190.5 mm
266.7 mm
54.767 mm
84.138 mm
109.535 mm
108000 N
CAD
475 - 472D
475
55.001 mm
120 mm
29.007 mm
53.975 mm
65.090 mm
37200 N
250000 N
M667935 - M667910D
M667900
387.248 mm
546.1 mm
87.313 mm
144.463 mm
185.735 mm
484000 N
3250000 N
LM446349NW - LM446310D
LM446300
234.95 mm
311.15 mm
50.8 mm
73.025 mm
101.600 mm
114000 N
768000 N
476 - 472D
475
60 mm
120 mm
29.007 mm
53.975 mm
65.090 mm
37200 N
250000 N
M667948 - M667910D
M667900
409.575 mm
546.1 mm
87.313 mm
144.463 mm
185.735 mm
438000 N
2940000 N
NA8575SW - 8520CD
8500
234.95 mm
327.025 mm
58.738 mm
82.55 mm
117.475 mm
137000 N
CAD
477 - 472D
475
63.500 mm
120 mm
29.007 mm
53.975 mm
65.090 mm
37200 N
250000 N
M667947 - M667910D
M667900
409.575 mm
546.1 mm
87.313 mm
144.463 mm
185.735 mm
484000 N
3250000 N
LM241149NW - LM241110D
LM241100
203.2 mm
276.225 mm
47.625 mm
73.025 mm
95.250 mm
114000 N
764000 N