Inch Tapered Roller Bearings:LM12749 / LM12710

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	一
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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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