Inch Tapered Roller Bearings:LM12749 / LM12710

Product Name: Inch Tapered Roller Bearings:LM12749 / LM12710
Type: Roller Bearing Brand : FODA
New Model: LM12749 / LM12710 Old Model:
Inner Diameter (mm): 21.986 Outer Diameter (mm): 45.237
Thickness (mm): 15.494 Weight (kg/pc): 0.120

Description

Basic Parameters

The LM12749/LM12710 inch tapered roller bearing is a single-row separable design consisting of an inner ring (cone) assembly LM12749 and an outer ring (cup) LM12710, engineered for combined radial and axial loads. With a bore diameter of 0.8656 inches (21.986 mm) and an outer diameter of 1.7810 inches (45.237 mm), it features a total width of 0.6100 inches (15.494 mm)12. The bearing incorporates a stamped steel cage to retain the tapered rollers, constructed from chrome steel (SAE 52100) for durability612. It offers a dynamic radial load rating of 38.6 kN (8,680 lbf) at 1 million revolutions and a static radial load rating of 35.3 kN (7,930 lbf), with a dynamic thrust capacity of 5.25 kN (1,180 lbf) at 90 million revolutions14. The contact angle, defined by the ISO factor e=0.31, supports moderate axial loads, while the geometry factor CG=0.048 influences lubrication requirements19. Operating at a maximum speed of 8,000 RPM under normal lubrication, this bearing is precision-machined to ABMA Class 2 standards, ensuring reliability in applications such as gearboxes, conveyor systems, and automotive axles1221. Its open design allows for easy maintenance and re-lubrication, with fillet radii of 0.050 inches (1.27 mm) to accommodate shaft and housing clearances16. Weighing 0.30 lb (0.100 kg), the LM12749/LM12710 adheres to imperial standards and is interchangeable with equivalent designs like SET12 and A12.

 

Product Application

Industrial Machinery & Heavy Equipment The LM12749/LM12710 tapered roller bearing excels in industrial machinery requiring robust radial-axial load capacity. In gearbox systems, its precision ABMA Class 2 machining ensures minimal backlash and vibration, critical for maintaining gear meshing accuracy in conveyor drives, printing presses, and packaging equipment. The separable design—with interchangeable cone (LM12749) and cup (LM12710)—simplifies installation and maintenance in modular machinery, reducing downtime during component replacement. Its 8,000 RPM speed rating suits high-speed applications like industrial fans and pumps, while the SAE 52100 chrome steel construction provides corrosion resistance in dusty or humid environments, such as cement plants or mining conveyors.

Automotive & Transportation
In automotive systems, this bearing is ideal for front and rear wheel hubs in light trucks and SUVs, where it withstands combined loads from vehicle weight and cornering forces. The 38.6 kN dynamic radial load rating and 5.25 kN thrust capacity make it suitable for differential assemblies, transmitting torque efficiently while handling axle misalignment. Its open design allows for periodic relubrication, a key advantage in off-road vehicles exposed to mud and debris. Additionally, the bearing’s compatibility with imperial standards (interchangeable with SET12/A12) supports retrofitting in older automotive models or after-market replacement parts, ensuring broad industry adoption.
Agricultural Equipment
Farm machinery demands components that endure harsh conditions, and the LM12749/LM12710 delivers in tractors, combines, and balers. It performs reliably in axle drives and PTO (power take-off) systems, where variable loads from uneven terrain and heavy attachments are common. The stamped steel cage stabilizes roller alignment under shock loads, preventing skidding or premature wear during sudden stops or starts. The 0.050-inch fillet radius accommodates shaft/housing clearances in rugged agricultural setups, minimizing stress concentrations from misalignment. Regular maintenance is simplified by the bearing’s accessible design, crucial for maintaining productivity during planting or harvest seasons.
Aerospace & Defense (Non-Critical Applications)
While not certified for primary aircraft systems, this bearing serves non-critical aerospace components like ground support equipment (GSE) and missile launcher turntables. Its lightweight design (0.30 lb) aids in mobile GSE applications, such as baggage conveyors or engine hoists, where portability and load-bearing capacity are balanced. The contact angle (defined by ISO factor e=0.31) manages moderate axial loads from rotating radar domes or antenna platforms, ensuring smooth azimuth/elevation movements. The bearing’s compliance with international tolerances also makes it a viable option for defense auxiliary systems requiring standardized, easily replaceable parts.
Material Handling & Conveyor Systems
In distribution centers and manufacturing facilities, the LM12749/LM12710 supports conveyor rollers and idlers in both horizontal and inclined setups. Its ability to handle misalignment—due to the tapered roller geometry—reduces stress on drive chains and belts, extending system lifespan. The dynamic/static load ratings make it suitable for heavy-duty conveyors transporting pallets or bulk materials, while the high-speed capability prevents overheating in high-throughput sorting systems. The bearing’s resistance to edge loading (via proper fillet radii) is critical in conveyor applications where shaft deflection or housing misalignment often occurs, ensuring consistent performance in 24/7 operation environments.
Custom Machinery & Retrofit Solutions
Engineers frequently specify this bearing for custom machinery designs due to its versatile load capacity and standard dimensions. Its compatibility with off-the-shelf seals and lubrication systems (e.g., lithium-based greases for -20°C to 120°C operating ranges) simplifies integration into prototype or low-volume production lines. In retrofit projects, the bearing replaces obsolete imperial taper roller designs without requiring shaft/housing modifications, leveraging its interchangeability with legacy parts like SET12. This adaptability makes it a cost-effective choice for upgrading older equipment—such as vintage machine tools or industrial pumps—while maintaining original structural integrity.

Product List

轴承型号 基本尺寸(mm) Dimension 基本载荷(mm) Dimension 重量
Bearing Designation d D T B C r(min) r1(min) Weight
11590/11520 15.875 42.862 14.288 14.288 9.525 1.5 1.5 0.100
LM11749/LM11710 17.462 39.878 13.843 14.605 10.668 1.5 1.3 0.080
A6075A6157 19.050 39.993 12.014 11.153 9.525 1 1.3 0.070
LM11949/LM11910 19.050 45.237 15.494 16.639 12.065 1.3 1.3 0.120
09067/09195 19.050 49.225 18.034 19.050 14.288 1.3 1.3 0.170
09067/09196 19.050 49.225 21.209 19.050 17.462 1.3 1.5 0.190
09074/09195 19.050 49.225 19.845 21.539 14.288 1.5 1.3 0.180
09074/09196 19.050 49.225 23.020 21.539 17.462 1.5 1.5
M12649/M12610 21.430 50.005 17.526 18.288 13.970 1.3 1.3 0.160
LM12748/LM12710 21.430 45.237 15.494 16.637 12.065 1.3 1.3 0.038
LM12748/LM12711 21.430 45.974 15.494 16.637 12.065 1.3 1.3
LM12749/LM12710 21.986 45.237 15.494 16.637 12.065 1.3 1.3 0.120
LM12749/LM12711 21.986 45.974 15.494 16.637 12.065 1.3 1.3 0.120
M12648/M12610 22.225 50.005 17.526 18.288 13.870 1.3 1.3 0.170
12801220 25.225 57.150 22.225 22.225 17.462 1.3 1.3 0.140
1755/1729 22.225 56.896 19.368 19.873 15.875 1.3 1.3 0.240
09093/07196 23.812 50.005 13.495 14.260 9.525 1.5 1 0.120
07093/07204 23.812 51.994 15.011 14.260 12.700 1.5 1.3 0.150
07097/07196 25.000 50.005 13.495 14.260 9.525 1.5 1
07097/07204 25.000 51.994 14.260 12.700 1.5 1.3
07100/07196 25.400 50.005 13.495 14.260 9.525 1 1 0.110
07100/07204 25.400 51.994 15.011 14.260 12.700 1 1.3 0.140
15100/15250 25.400 63.500 20.637 20.638 15.875 3.5 1.3
15101/15243 25.400 61.912 19.050 20.638 14.288 0.8 2
15101/15245 25.400 62.000 19.050 20.638 14.288 0.8 1.3 0.290
15101/15250 25.400 63.500 20.638 20.638 15.875 0.8 1.3
15101/15250X 25.400 63.500 20.638 20.638 15.875 0.8 1.5 0.320
M86643/M86610 25.400 64.292 21.433 21.433 16.670 1.5 1.5
23100/23256 25,400 65.088 22.225 21.463 15.875 1.5 1.5 0.360
M84548/M84510 25.400 57.150 19.431 19.431 14.732 1.5 1.5 0.230
L44643/L44610 25.400 50.292 14.224 14.732 10.668 1.3 1.3 0.120
L44643/JL44615 25.400 52.000 14.224 14.732 10.668 1.3 1.3
K15579X/K15520 25.987 57.150 17.462 13.945 1.5 0.207
151038/15245 26.157 62.000 19.050 20.638 14.288 0.8 1.3 0.290
15103S/15243 26.162 61.912 19.050 19.939 14.288 0.8 2 0.290
15103S/15245 26.162 62.000 19.050 19.939 14.288 0.8 1.3 0.290
15103S/15250 26.162 63.500 20.637 19.939 15.875 0.8 1.3
15106/15245 26.988 62.000 19.050 20.638 14.288 0.8 1.3 0.280
L44649/L44610 26.988 50.292 14.224 14.732 10.668 3.5 1.3 0.110
L44649/JL44615 26.988 52.000 14.224 14.732 10.668 3.5 1.3 0.130
15106/15250X 26.988 63.500 20.638 20.638 15.875 0.8 1.6 0.317
15580/15520 26.988 57.150 17.938 17.462 13.495 3.5
02474/02420 28.575 68.262 22.225 22.225 17.462 0.8 1.6 0.400
02872/02820 28.575 73.025 22.225 22.225 17.462 0.8 3.3 1.040
15112/15245 28.575 62.000 19.050 20.638 14.288 3.5 1.3 0.270
15112/15250 28.575 63.500 20.638 20.638 15.875 3.6 0.2 0.305
15590/15520 28.575 57.150 17.462 17.462 13.495 3.5 1.5 0.190

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