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)
EE649239 - 649311CD
649000
607.720 mm
787.4 mm
93.663 mm
158.750 mm
206.375 mm
677000 N
4550000 N
EE971354 - 972103D
970000
342.900 mm
533.400 mm
76.200 mm
123.825 mm
174.625 mm
448000 N
3010000 N
EE224115 - 224205D
224000
292.100 mm
520.7 mm
107.950 mm
165.100 mm
228.600 mm
506000 N
3400000 N
EE655270 - 655346CD
655000
685.8 mm
876.300 mm
92.075 mm
152.400 mm
200.025 mm
714000 N
4790000 N
EE982051 - 982901CD
980000
520.7 mm
736.600 mm
81.758 mm
114.300 mm
186.502 mm
516000 N
3460000 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
478 - 472D
475
65.001 mm
120 mm
29.007 mm
53.975 mm
65.090 mm
37200 N
250000 N
M667944 - M667911D
M667900
406.400 mm
546.1 mm
87.313 mm
147.638 mm
185.735 mm
484000 N
3250000 N
LM249747NW - LM249710CD
LM249700
253.975 mm
347.663 mm
50.8 mm
69.85 mm
101.600 mm
159000 N
1070000 N
479 - 472D
475
66.675 mm
120 mm
29.007 mm
53.975 mm
65.090 mm
37200 N
250000 N
M667948 - M667911D
M667900
409.575 mm
546.1 mm
87.313 mm
147.638 mm
185.735 mm
438000 N
2940000 N
LM251649NW - LM251610D
LM251600
266.7 mm
352.425 mm
53.975 mm
82.55 mm
107.950 mm
147000 N
985000 N
480 - 472D
475
68.263 mm
120 mm
29.007 mm
53.975 mm
65.090 mm
37200 N
250000 N
M667947 - M667911D
M667900
409.575 mm
546.1 mm
87.313 mm
147.638 mm
185.735 mm
484000 N
3250000 N
L357049NW - L357010CD
L357000
304.8 mm
393.7 mm
53.975 mm
82.55 mm
107.950 mm
152000 N
1020000 N