**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.
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) |
---|---|---|---|---|---|---|---|---|
HM256800 |
300.038 mm |
422.275 mm |
82.550 mm |
136.525 mm |
174.625 mm |
336000 N |
2260000 N |
|
240000 |
431.800 mm |
603.25 mm |
73.025 mm |
98.425 mm |
153.289 mm |
292000 N |
1960000 N |
|
737000 |
441.325 mm |
660.400 mm |
85.725 mm |
138.113 mm |
195.262 mm |
457000 N |
3070000 N |
|
243000 |
489.026 mm |
634.873 mm |
80.963 mm |
142.875 mm |
177.800 mm |
380000 N |
2560000 N |
|
737000 |
457.200 mm |
660.400 mm |
85.725 mm |
138.113 mm |
195.262 mm |
457000 N |
3070000 N |
|
290000 |
304.8 mm |
444.5 mm |
61.913 mm |
176.200 mm |
223.825 mm |
230000 N |
1540000 N |
|
737000 |
457.200 mm |
660.400 mm |
85.725 mm |
138.113 mm |
195.262 mm |
457000 N |
3070000 N |
|
295000 |
260.350 mm |
488.950 mm |
120.650 mm |
196.850 mm |
254.000 mm |
628000 N |
4220000 N |
|
743000 |
609.600 mm |
812.800 mm |
82.550 mm |
146.050 mm |
190.500 mm |
538000 N |
3610000 N |
|
295000 |
279.4 mm |
488.950 mm |
120.650 mm |
196.850 mm |
254.000 mm |
628000 N |
4220000 N |
|
749000 |
660.400 mm |
854.923 mm |
85.468 mm |
135.900 mm |
186.329 mm |
581000 N |
3900000 N |
|
328000 |
425.450 mm |
685.698 mm |
142.799 mm |
234.950 mm |
311.150 mm |
812000 N |
5450000 N |
|
822000 |
254 mm |
444.5 mm |
73.025 mm |
114.300 mm |
165.100 mm |
305000 N |
2050000 N |
|
M667900 |
387.248 mm |
546.1 mm |
87.313 mm |
147.638 mm |
185.735 mm |
484000 N |
3250000 N |
|
L163100 |
355.6 mm |
444.5 mm |
68.263 mm |
111.125 mm |
136.525 mm |
190000 N |
1280000 N |
|
475 |
63.500 mm |
120 mm |
29.007 mm |
53.975 mm |
65.090 mm |
37200 N |
250000 N |
|
M667900 |
409.575 mm |
546.1 mm |
87.313 mm |
147.638 mm |
185.735 mm |
484000 N |
3250000 N |
|
455 |
50.8 mm |
107.95 mm |
37.308 mm |
53.975 mm |
74.615 mm |
35200 N |
CAD |
|
475 |
70 mm |
120 mm |
29.007 mm |
53.975 mm |
65.090 mm |
37200 N |
250000 N |
|
M667900 |
387.248 mm |
546.1 mm |
87.313 mm |
147.638 mm |
185.735 mm |
484000 N |
3250000 N |