Inch Tapered Roller Bearing

Inch Tapered Roller Bearing

Inch Tapered Roller Bearing

Key Features of UMZ Tapered Roller Bearings
• Superior Load Capacity: Engineered to support both radial and axial loads effectively, ensuring optimal performance even under high-stress conditions.
• High Durability: Manufactured with premium-grade materials and advanced heat treatment processes to enhance wear resistance and lifespan.
• Precision Engineering: Ensures smooth operation, reduced friction, and improved energy efficiency.
• Custom Solutions: Available in various sizes and specifications to meet the unique needs of different industries, including automotive, heavy machinery, and industrial equipment.


Tapered roller bearings are widely used in various industries due to their ability to handle combined radial and axial loads efficiently. Their unique conical design allows them to manage high thrust and radial forces while maintaining precise alignment. Below are some key applications:

1. Automotive Industry

  • Wheel Hubs: Commonly used in cars, trucks, and SUVs to support wheel rotation while handling radial (vehicle weight) and axial (cornering forces) loads.

  • Transmissions & Differentials: Helps in managing gear loads and reducing friction.

  • Axle Systems: Used in heavy-duty trucks and trailers for better load distribution.

2. Industrial Machinery

  • Gearboxes: Supports high-speed rotation while handling radial and thrust loads.

  • Conveyor Systems: Used in heavy-load applications like mining and material handling.

  • Pumps & Compressors: Ensures smooth operation under varying load conditions.

3. Aerospace & Defense

  • Aircraft Landing Gear: Handles heavy loads during takeoff and landing.

  • Helicopter Rotor Systems: Supports high-speed rotation with precision.

4. Railway & Transportation

  • Locomotive & Freight Car Axles: Provides durability under heavy loads and vibrations.

  • High-Speed Trains: Ensures stability and reduces wear.

5. Construction & Heavy Equipment

  • Cranes & Excavators: Supports heavy axial and radial loads in dynamic conditions.

  • Mining Equipment: Used in drills, crushers, and earth-moving machinery.

selectInquiryBearing No.Boundary dimensions(mm) Basic load ratings(kN)
dBR DCrTDynamic(Cr)Static(Cor)
64450/64700 114,300 177,800 41,275 251 415 42,5 2600 3800 3,60
68450/68712 114,300 180,975 34,925 183 280 30 2600 3800 2,95
48290/48220/Q 127,000 182,562 39,688 229 440 44 2400 3600 3,30
67388/67322 127,000 196,850 46,038 319 585 60 2200 3400 5,20
L327249/210 133,350 177,008 25,400 134 280 28 2400 3600 1,80
67391/67322 133,350 196,850 46,038 319 585 60 2200 3400 4,80
HM231132/110 139,700 236,538 57,150 512 850 86,5 1900 2800 10,0
HM231148/110 149,225 236,538 57,150 512 850 86,5 1900 2800 10,0
L432348/310 158,750 205,583 23,812 138 280 27 2000 3000 1,95
L432349/310 158,750 205,583 23,812 138 280 27 2000 3000 1,95
36990/36920 177,800 227,012 30,162 187 425 40 1800 2800 3,00
M336948/912 178,595 265,112 51,595 495 880 86,5 1700 2400 9,60
M336949/912 179,934 265,112 51,595 495 880 86,5 1700 2400 9,40
87737/87111 187,325 282,575 50,800 402 695 67 1600 2200 9,80
M239449/410 190,475 279,400 52,388 523 980 95 1600 2200 9,50
87750/87111 190,500 282,575 50,800 402 695 67 1600 2200 9,60
M239448A/410 191,237 279,400 52,388 523 980 95 1600 2200 9,20
LL639249/210 196,850 241,300 23,812 154 315 29 1700 2600 2,00
LL639249/2/210/4 196,850 241,300 23,812 154 315 29 1700 2600 2,00
LM739749/710/VE174 196,850 257,175 39,688 275 655 58,5 1600 2400 5,30
LM241147/110/QVQ051 200,025 276,225 42,862 450 780 72 1700 2200 7,70
LM241148/110/QVQ051 203,987 276,225 42,862 450 780 72 1700 2200 7,25
LM742749/710/VE174 215,900 285,750 46,038 380 850 76,5 1500 2200 7,90
LM742747/710 216,408 285,750 46,038 380 850 76,5 1500 2200 7,85
LM742747A/710 216,713 285,750 46,038 380 850 76,5 1500 2200 7,85
LM245846/810 230,188 317,500 47,625 523 980 90 1300 2000 10,5
544091/2B/544118A/2B 231,775 300,038 33,338 216 425 39 1400 2000 5,30
LM245848/810 231,775 317,500 47,625 523 980 90 1300 2000 10,5
M349547/510 255,600 342,900 57,150 594 1220 110 1200 1800 14,0
M349549/510/VE174 257,175 342,900 57,150 594 1220 110 1200 1800 14,0