Custom 31300 Series Tapered Roller Bearing Manufacturers, Factory

31300 Series

The 31300 Series Tapered Roller Bearing is a high-precision separable bearing designed to manage simultaneous radial and axial loads. This series features a steeper contact angle compared to standard tapered bearings, specifically engineered to provide enhanced axial load-carrying capacity. The assembly consists of four interdependent components: the inner ring (cone), the outer ring (cup), tapered rollers, and a window-type cage. The internal geometry is mathematically optimized so that the conical surfaces of the rollers and raceways meet at a common apex on the bearing axis, ensuring true rolling motion and low friction during high-speed operation.

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Core Technical Advantages

Enhanced Axial Thrust Capacity: The increased steepness of the 31300 series angle allows the bearing to support significant thrust loads in one direction while maintaining radial stability.
Separable Component Design: The cup and cone assemblies are independent, facilitating simplified mounting, dismounting, and maintenance inspection protocols in industrial housing.
Load Distribution Accuracy: The logarithmic roller profile reduces edge stresses at the roller/raceway contact points, extending service life under heavy-duty conditions.
Low Operational Friction: Precision-ground raceways and optimized surface finishes minimize heat generation and lubricant degradation during continuous rotation.

Primary Application Fields

Automotive Drivetrains: Integrated into differential assemblies, pinion shafts, and transmission systems requiring rigid axial support.
Heavy Machinery: Utilized in construction equipment, agricultural machinery, and mining conveyors for managing combined load stresses.
Industrial Gearboxes: Applied in reduction gear units where high torque and axial thrust are present during power transmission.
Machine Tool Spindles: Providing rotational accuracy and stiffness in industrial processing equipment.

Installation and Maintenance Protocols

Clearance Adjustment: During installation, the axial clearance or preload must be set correctly. Incorrect adjustment can lead to premature fatigue or excessive operating temperatures.
Lubrication Compatibility: Ensure the lubricant (grease or oil) is compatible with the operating temperature and speed. Mineral-based or synthetic lubricants must reach all contact surfaces before startup.
Storage Conditions: Bearings should be stored in a dry, vibration-free environment in their original moisture-proof packaging. The ambient temperature should remain stable to prevent condensation and subsequent oxidation.
Contamination Prevention: Maintain a clean assembly environment. Solid particles entering the raceways can cause indentation, leading to surface spalling and bearing failure.

Handling and Safety Indicators

Avoid direct impact on the bearing rings during installation; use specialized induction heaters or press tools for mounting. Regularly monitor vibration signatures and thermal output during the initial run-in period to verify the integrity of the seating and alignment. Protective anti-corrosion oils applied at the factory should not be removed unless the specific lubrication system requires a specialized base oil.

Designation	Principal dimensions（mm）			Basic load ratings（KN）		Pu	Speed ratings（rpm）		Weight(Kg)	ISO335	Dimensions （mm）							Abutment and fillet dimensions （mm）									Value
Designation	d1	D	B	dyc(Cr)	stc(Cor)	Pu	Speed Ratings	Limiting Speed	Weight(Kg)	Dimensions (ABMA)	d	d1～	B	C	r1,2(min)	r3,4(min)	a	da(max)	db(min)	Da(min)	Da(max)	Db(min)	Ca(min)	Cb(min)	ra(max)	rb(max)	e	Y	Yo
31305J2	25	62	18,25	38	40	4,4	7500	11000	0,26	7FB	25	45,8	17	13	1,5	1,5	20	34	32	47	55	59	3	5	1,5	1,5	0,83	0,72	0,4
31306J2/Q	30	72	20,75	55	50	5,7	7500	9500	0,39	7FB	30	52,7	19	14	1,5	1,5	22	40	37	55	65	68	3	6,5	1,5	1,5	0,83	0,72	0,4
31307J2/Q	35	80	22,75	71	67	7,8	6300	8500	0,52	7FB	35	59,6	21	15	2	1,5	25	45	44	62	71	76	3	7,5	2	1,5	0,83	0,72	0,4
31308J2/QCL7C	40	90	25,25	85	81,5	9,5	5600	7500	0,72	7FB	40	67,1	23	17	2	1,5	28	51	49	71	81	86	3	8	2	1,5	0,83	0,72	0,4
31309J2/QCL7C	45	100	27,25	106	102	12,5	5000	6700	0,95	7FB	45	74,7	25	18	2	1,5	31	57	53	79	91	95	4	9	2	1,5	0,83	0,72	0,4
31310J2/QCL7C	50	110	29,25	122	120	14,3	4500	6000	1,20	7FB	50	81,5	27	19	2,5	2	34	62	60	87	100	104	4	10	2	2	0,83	0,72	0,4
31311J2/QCL7C	55	120	31,5	140	137	16,6	4300	5600	1,55	7FB	55	88,4	29	21	2,5	2	37	68	65	94	112	113	4	10,5	2	2	0,83	0,72	0,4
31312J2/QCL7C	60	130	33,5	166	166	20,4	3800	5300	1,90	7FB	60	95,9	31	22	3	2,5	39	74	72	103	118	123	5	11,5	2,5	2	0,83	0,72	0,4
31313J2/QCL7C	65	140	36	190	193	23,6	3600	4800	2,35	7GB	65	103	33	23	3	2,5	42	80	77	111	128	132	5	13	2,5	2	0,83	0,72	0,4
31314J2/QCL7C	70	150	38	216	220	27	3400	4500	2,95	7GB	70	110	35	25	3	2,5	45	85	82	118	138	141	5	13	2,5	2	0,83	0,72	0,4
31315J2/QCL7C	75	160	40	240	245	29	3200	4300	3,50	7GB	75	116	37	26	3	2,5	48	91	87	127	148	151	6	14	2,5	2	0,83	0,72	0,4
31316J1/QCL7C	80	170	42,5	260	265	32	3000	4000	4,05	7GB	80	124	39	27	3	2,5	52	97	92	134	158	159	6	15,5	2,5	2	0,83	0,72	0,4
31317J2	85	180	44,5	242	285	33,5	2600	3800	4,60	7GB	85	131	41	28	4	3	55	103	99	143	166	169	6	16,5	3	2,5	0,83	0,72	0,4
31318J2	90	190	46,5	264	315	36,5	2400	3400	5,90	7GB	90	138	43	30	4	3	57	109	105	151	176	179	5	16,5	3	2,5	0,83	0,72	0,4
31319J2	95	200	49,5	292	355	39	2400	3400	6,95	7GB	95	145	45	32	4	3	60	114	110	157	186	187	5	17,5	3	2,5	0,83	0,72	0,4
31320XJ2/CL7CVQ051	100	215	56,5	430	465	51	2400	3000	8,60	7GB	100	158	51	35	4	3	65	121	115	168	201	202	7	21,5	3	2,5	0,83	0,72	0,4
31322XJ2	110	240	63	457	585	62	1900	2800	12,0	7GB	110	176	57	38	4	3	72	135	125	188	226	224	7	25	3	2,5	0,83	0,72	0,4
31324XJ2	120	260	68	539	695	73,5	1700	2400	15,5	7GB	120	190	62	42	4	3	78	145	135	203	245	244	9	26	3	2,5	0,83	0,72	0,4
31326XJ2	130	280	72	605	780	81,5	1600	2400	18,5	7GB	130	204	66	44	5	4	84	157	150	218	263	261	8	28	4	3	0,83	0,72	0,4
31328XJ2	140	300	77	693	900	88	1500	2200	24,5	7GB	140	219	70	47	5	4	90	169	160	235	283	280	9	30	4	3	0,83	0,72	0,4
31330XJ2	150	320	82	781	1020	100	1400	2000	29,5	7GB	150	234	75	50	5	4	96	181	170	251	303	300	9	32	4	3	0,83	0,72	0,4

31300 Series

Core Technical Advantages

Primary Application Fields

Installation and Maintenance Protocols

Handling and Safety Indicators

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