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)
L281147 - L281110CD	L281100	660.400 mm	812.800 mm	95.250 mm	158.750 mm	203.200 mm	709000 N	4760000 N
LM272235 - LM272210CD	LM272200	457.200 mm	615.950 mm	85.725 mm	146.050 mm	184.150 mm	503000 N	3380000 N
LM272249 - LM272210CD	LM272200	482.600 mm	615.950 mm	85.725 mm	146.050 mm	184.150 mm	439000 N	2950000 N
LM281049 - LM281010CD	LM281000	646.113 mm	857.250 mm	141.288 mm	241.300 mm	304.800 mm	1220000 N	8180000 N
LM281849 - LM281810CD	LM281800	679.450 mm	901.700 mm	142.875 mm	244.475 mm	307.975 mm	1300000 N	8740000 N
LM446349 - LM446310CD	LM446300	234.95 mm	311.15 mm	46.038 mm	73.025 mm	98.425 mm	114000 N	768000 N
LM961548 - LM961511CD	LM961500	342.900 mm	457.098 mm	63.5 mm	101.600 mm	142.875 mm	213000 N	1430000 N
M270749 - M270720D	M270700	447.675 mm	649.925 mm	120.650 mm	206.375 mm	257.175 mm	849000 N	5700000 N
M270749A - M270710CD	M270700	447.675 mm	635.000 mm	120.650 mm	206.375 mm	257.175 mm	799000 N	5370000 N
M272749 - M272710CD	M272700	479.425 mm	679.450 mm	128.588 mm	222.250 mm	276.225 mm	968000 N	6500000 N
M274149 - M274110CD	M274100	501.650 mm	711.2 mm	136.525 mm	231.775 mm	292.100 mm	916000 N	6150000 N
M276449 - M276410CD	M276400	536.575 mm	761.873 mm	146.050 mm	247.650 mm	311.150 mm	1040000 N	6980000 N
M278749 - M278710CD	M278700	571.500 mm	812.800 mm	155.575 mm	263.525 mm	333.375 mm	1180000 N	7890000 N
598A - 592D	595	92.075 mm	152.400 mm	36.322 mm	63.5 mm	82.550 mm	56000 N	376000 N
635 - 632D	635	57.150 mm	136.525 mm	41.275 mm	76.2 mm	95.250 mm	60400 N	406000 N
639 - 632D	635	63.500 mm	136.525 mm	41.275 mm	76.2 mm	95.250 mm	71600 N	481000 N
643 - 632D	635	69.850 mm	136.525 mm	41.275 mm	76.2 mm	95.250 mm	71600 N	481000 N
644 - 632D	635	71.438 mm	136.525 mm	41.275 mm	76.2 mm	95.250 mm	71600 N	481000 N
93708 - 93127CD	93000	179.974 mm	317.500 mm	63.5 mm	111.125 mm	146.050 mm	190000 N	1270000 N
EE224115 - 224205D	224000	292.100 mm	520.7 mm	107.950 mm	165.100 mm	228.600 mm	506000 N	3400000 N
EE241693 - 242376D	240000	430.213 mm	603.25 mm	73.025 mm	98.425 mm	153.289 mm	292000 N	1960000 N
EE241701 - 242376D	240000	431.800 mm	603.25 mm	73.025 mm	98.425 mm	153.289 mm	292000 N	1960000 N
EE243192 - 243251CD	243000	489.026 mm	634.873 mm	80.963 mm	142.875 mm	177.800 mm	380000 N	2560000 N
EE291201 - 291753CD	290000	304.8 mm	444.5 mm	61.913 mm	176.200 mm	223.825 mm	230000 N	1540000 N

Tapered Roller Bearings Product Introduction

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