TIMKEN -Torrington HJ-12415448 Needle Roller bearing,Cylindrical Roller Radial Bearings-HJ Series 196,850 X 244,475 X 76,20 (mm)

DIMENSIONS AND LOAD RATINGS
Fw Bore		D Outside Diameter		C/B Width		Bearing Designation	Load Ratings			Limiting Speed	ra* Housing Fillet		Used with Inner Ring Designation †	F Housing Shoulder Diameter
							Basic Dynamic Cr		Basic Static CO
								ISO	ISO
(nom.)		(nom.)		(nom.)			T	281	76		(max.)			±1⁄64	±0.4
inch	mm	inch	mm	inch	mm		lbf	lbf	lbf	rpm	inch	mm		inch	mm
3.7500	95,250	4.7500	120,650	2.000	50,80	HJ-607632	32 900	44 200	91 000	4 540	0.10	2,5	IR-506032 IR-526032	4 3⁄8	111,1
4.0000	101,600	5.0000	127,000	2.000	50,80	HJ-648032	34 300	46 000	98 000	4 230	0.10	2,5	IR-526432 IR-546432 IR-566432	4 5⁄8	117,5
4.2500	107,950	5.2500	133,350	2.000	50,80	HJ-688432	34 700	46 500	102 000	3 970	0.10	2,5	IR-566832 IR-606832	4 7⁄8	123,8
4.5000 4.5000	114,300 114,300	6.0000 6.0000	152,400 152,400	2.250 2.500	57,15 63,50	HJ-729636 HJ-729640	48 000 53 400	64 400 71 700	116 000 134 000	3 850 3 850	0.10 0.10	2,5 2,5	IR-607236 IR-607240	5 7⁄16 5 7⁄16	138,1 138,1
5.0000 5.0000   5.0000	127,000 127,000   127,000	6.5000 6.5000   6.5000	165,100 165,100   165,100	2.000 2.250   2.500	50,80 57,15   63,50	HJ-8010432 HJ-8010436   HJ-8010440	46 100 52 000   57 800	61 200 69 400   77 300	113 000 133 000   152 000	3 430 3 430   3 430	0.10 0.10   0.10	2,5 2,5   2,5	— IR-648036 IR-688036 IR-648040	5 15⁄16 5 15⁄16   5 15⁄16	150,8 150,8   150,8
5.5000 5.5000	139,700 139,700	7.0000 7.0000	177,800 177,800	2.500 3.000	63,50 76,20	HJ-8811240 HJ-8811248	58 600 69 500	78 600 93 300	160 000 199 000	3 120 3 120	0.10 0.10	2,5 2,5	IR-728840 IR-728848	6 7⁄16 6 7⁄16	163,5 163,5
5.7500	146,050	7.2500	184,150	3.000	76,20	HJ-9211648	70 600	94 800	207 000	2 960	0.12	3,0	IR-769248	6 11⁄16	169,9
6.0000 6.0000	152,400 152,400	7.5000 7.5000	190,500 190,500	2.500 3.000	63,50 76,20	HJ-9612040 HJ-9612048	61 900 74 000	83 000 99 300	178 000 224 000	2 830 2 830	0.12 0.12	3,0 3,0	IR-809640 IR-809648	6 15⁄16 6 15⁄16	176,2 176,2
6.5000 6.5000	165,100 165,100	8.0000 8.0000	203,200 203,200	2.500 3.000	63,50 76,20	HJ-10412840 HJ-10412848	64 100 76 300	86 000 102 000	191 000 237 000	2 600 2 600	0.12 0.12	3,0 3,0	IR-8810440 IR-8810448	7 7⁄16 7 7⁄16	188,9 188,9
7.2500	184,150	9.1250	231,775	3.000	76,20	HJ-11614648	88 600	118 300	253 000	2 340	0.12	3,0	IR-9611648	8 1⁄2	215,9
7.7500	196,850	9.6250	244,475	3.000	76,20	HJ-12415448	92 000	123 000	271 000	2 180	0.12	3,0	IR-10412448	9	228,6
8.2500	209,550	10.1250	257,175	3.000	76,20	HJ-13216248	95 400	127 000	290 000	2 040	0.12	3,0	IR-11213248	9 1⁄2	241,3
8.7500	222,250	10.6250	269,875	3.000	76,20	HJ-14017048	98 600	130 000	308 000	1 920	0.16	4,0	IR-12014048	10	254,0
9.2500	234,950	11.1250	282,575	3.000	76,20	HJ-14817848	101 000	136 000	326 000	1 810	0.16	4,0	IR-12814848	10 1⁄2	266,7

 

BEARING MOUNTING DIMENSIONS
Mounting Dimensions, Clearance Fit								Bearing Designation	Mounting Dimensions, Tight Transition Fit
Inch Mounting				Metric Mounting(mm)					Inch Mounting				Metric Mounting(mm)
S Shaft Raceway Diameter		H Housing Bore Diameter		S Shaft Raceway Diameter		H Housing Bore Diameter			S Shaft Raceway Diameter		H Housing Bore Diameter		S Shaft Raceway Diameter		H Housing Bore Diameter
max.	min.	min.	max.	max.	min.	min.	max.		max.	min.	min.	max.	max.	min.	min.	max.
3.7500	3.7491	4.7500	4.7516	95,250	95,227	120,650	120,691	HJ-607632	3.7487	3.7477	4.7478	4.7494	95,214	95,191	120,594	120,635
4.0000	3.9991	5.0000	5.0016	101,600	101,577	127,000	127,041	HJ-648032	3.9986	3.9977	4.9978	4.9994	101,564	101,541	126,944	126,985
4.2500	4.2491	5.2500	5.2516	107,950	107,927	133,350	133,391	HJ-688432	4.2486	4.2477	5.2478	5.2494	107,914	107,891	133,294	133,335
4.5000 4.5000	4.4991 4.4991	6.0000 6.0000	6.0016 6.0016	114,300 114,300	114,277 114,277	152,400 152,400	152,441 52,441	HJ-729636 HJ-729640	4.4986 4.4986	4.4977 4.4977	5.9978 5.9978	5.9994 5.9994	114,264 114,264	114,241 114,241	152,344 152,344	152,385 152,385
5.0000 5.0000 5.0000	4.9990 4.9990 4.9990	6.5000 6.5000 6.5000	6.5016 6.5016 6.5016	127,000 127,000 127,000	126,975 126,975 126,975	165,100 165,100 165,100	165,141 165,141 165,141	HJ-8010432 HJ-8010436 HJ-8010440	4.9984 4.9984 4.9984	4.9974 4.9974 4.9974	6.4978 6.4978 6.4978	6.4994 6.4994 6.4994	126,959 126,959 126,959	126,934 126,934 126,934	165,044 165,044 165,044	165,085 165,085 165,085
5.5000 5.5000	5.4990 5.4990	7.0000 7.0000	7.0016 7.0016	139,700 139,700	139,675 139,675	177,800 177,800	177,841 77,841	HJ-8811240 HJ-8811248	5.4984 5.4984	5.4974 5.4974	6.9978 6.9978	6.9994 6.9994	139,659 139,659	139,634 139,634	177,744 177,744	177,785 177,785
5.7500	5.7490	7.2500	7.2518	146,050	146,025	184,150	184,196	HJ-9211648	5.7484	5.7474	7.2476	7.2494	146,009	145,984	184,089	184,135
6.0000 6.0000	5.9990 5.9990	7.5000 7.5000	7.5018 7.5018	152,400 152,400	152,375 152,375	190,500 190,500	190,546 190,546	HJ-9612040 HJ-9612048	5.9984 5.9984	5.9974 5.9974	7.4976 7.4976	7.4994 7.4994	152,359 152,359	152,334 152,334	190,439 190,439	190,485 190,485
6.5000 6.5000	6.4990 6.4990	8.0000 8.0000	8.0018 8.0018	165,100 165,100	165,075 165,075	203,200 203,200	203,246 203,246	HJ-10412840 HJ-10412848	6.4984 6.4984	6.4974 6.4974	7.9976 7.9976	7.9994 7.9994	165,059 165,059	165,034 165,034	203,139 203,139	203,185 203,185
7.2500	7.2488	9.1250	9.1268	184,150	184,120	231,775	231,821	HJ-11614648	7.2480	7.2468	9.1226	9.1244	184,099	184,069	231,714	231,760
7.7500	7.7488	9.6250	9.6268	196,850	196,820	244,475	244,521	HJ-12415448	7.7480	7.7468	9.6226	9.6244	196,799	196,769	244,414	244,460
8.2500	8.2488	10.1250	10.1270	209,550	209,520	257,175	257,226	HJ-13216248	8.2480	8.2468	10.1224	10.1244	209,499	209,469	257,109	257,160
8.7500	8.7488	10.6250	10.6270	222,250	222,220	269,875	269,926	HJ-14017048	8.7480	8.7468	10.6224	10.6244	222,199	222,169	269,809	269,860
9.2500	9.2488	11.1250	11.1270	234,950	234,920	282,575	282,626	HJ-14817848	9.2480	9.2468	11.1224	11.1244	234,899	234,869	282,509	282,560

TIMKEN-Torrington HJ-12415448 Needle Roller Bearing

The TIMKEN-Torrington HJ-12415448 is a full complement needle roller bearing designed to handle heavy radial loads with precision and reliability in applications where space is limited. As part of TIMKEN’s comprehensive line of needle roller bearings, the HJ-12415448 is engineered for durability, high performance, and efficient operation, making it ideal for demanding industrial, automotive, and construction machinery applications.

Design and Construction

The HJ-12415448 is a full complement bearing, which means it does not use a cage, allowing it to incorporate the maximum number of needle rollers. This design significantly enhances the bearing’s load-bearing capacity by maximizing the contact area between the needle rollers and raceways. The bearing features an outer diameter of approximately 12 inches (304.8 mm), a length of 15.4 inches (391.16 mm), and a wall thickness of 4.8 inches (121.92 mm). This combination provides a robust, space-efficient solution for applications requiring high load capacity in compact spaces.。

The bearing’s outer ring is made from high-quality, case-hardened steel, providing excellent resistance to wear, impact, and fatigue. This ensures the bearing can withstand the high stresses encountered in challenging operational environments. The densely packed needle rollers are precisely aligned, ensuring even load distribution and minimizing internal friction. This reduces heat generation and stress concentrations within the bearing, contributing to smoother operation, lower operating temperatures, and an extended service life. The absence of an inner ring allows the bearing to be mounted directly on the shaft, simplifying installation and conserving space.

Performance Features

High Load Capacity: The full complement design of the HJ-12415448 allows it to support substantial radial loads efficiently. By incorporating the maximum number of needle rollers, the bearing distributes the load more evenly, enhancing its ability to handle continuous or shock loading conditions.

Space-Efficient Design: The compact form factor of the HJ-12415448 is particularly advantageous in applications where space constraints are a primary concern. Its design allows for high load capacity without the need for a larger bearing, making it an excellent choice for systems where minimizing overall size is critical.

Durability and Reliability: Constructed from high-grade materials, the HJ-12415448 offers exceptional resistance to wear, impact, and fatigue, even under heavy-duty conditions. Its design minimizes internal friction, which not only reduces energy consumption but also extends the bearing’s operational life.

Ease of Installation: The absence of an inner ring allows for direct mounting on the shaft, simplifying assembly and reducing the overall footprint of the bearing system. This feature is particularly useful in applications where quick maintenance and efficient assembly processes are essential.

Applications

The HJ-12415448 is well-suited for a variety of heavy-duty applications, including:

• Industrial Gearboxes:Its high load capacity makes it ideal for gearboxes in industrial machinery that require reliable, long-lasting components to handle heavy loads.
• Automotive Transmissions:In automotive applications, the compact design and robust performance of the HJ-12415448 make it a perfect fit for transmission systems where space is limited but durability is essential.
• Construction Equipment:The bearing’s ability to handle high radial loads and resist wear makes it suitable for use in construction machinery such as cranes, loaders, and excavators, which operate under demanding conditions.

Heavy-Duty Pumps and Conveyors: The HJ-12415448 performs well in continuous loading applications such as heavy-duty pumps and conveyors, where it helps maintain efficient, smooth operation with minimal downtime.

Conclusion

The TIMKEN-Torrington HJ-12415448 needle roller bearing is a high-capacity, durable solution designed for demanding applications that require exceptional radial load support in compact spaces. Its full complement design maximizes load-bearing capacity, while its robust construction ensures reliable performance under heavy loads. This bearing exemplifies TIMKEN’s commitment to delivering innovative and high-quality bearing solutions tailored to the rigorous demands of modern industrial and automotive environments. Whether used in heavy machinery, automotive systems, or industrial equipment, the HJ-12415448 provides the durability, efficiency, and performance needed to keep operations running smoothly and effectively.