High Quality Four Point Angular Contact Ball Bearings Qj303 Qj304 Qj305 Qj306 Qj307 Qj308 Qj309 Qj310 Qj311 XL-MPa Ma N2ma Lb, P0 P6 P5 P4 Grade

• Customization: Available
• Transport Package: Plastic Bag/White Box/Carton/Pallet
• Specification: QJ303-QJ344
• Model NO.: QJ303-QJ344
• Trademark: TIK or your mark
• Origin: Chengdu
• HS Code: 8482103000
• Production Capacity: 100000 PCS Per Year

Product Description

Four - point angular contact ball bearings are a type of single - row angular contact ball bearings2. Here is a detailed introduction:

Structural Characteristics

• Split Inner Ring: The inner ring of a four - point angular contact ball bearing is split into two halves. This design allows for the installation of more balls, increasing the bearing's load - carrying capacity. The outer ring with the ball and cage assembly and the two inner ring halves can be mounted separately, which is convenient for installation and maintenance.
• Raceway Design: The outer ring raceway is offset, which enlarges the contact area between the balls and the raceway, enabling the bearing to withstand greater axial loads. The inner and outer ring raceways have a peach - shaped cross - section. When there is no load or only a pure radial load is applied, each ball contacts the raceways at four points, thus giving the bearing its name. When a pure axial load is applied, the balls and the raceways have only two contact points.

Working Principles

• Load - Bearing Capacity: With a contact angle of 35 degrees, these bearings can support both radial and axial loads. The four contact points between the balls and the raceways distribute the load evenly, allowing the bearing to handle higher loads. They can bear bi - directional axial loads and, within a certain range, radial loads. Moreover, they can also bear moment loads, combining the functions of single - row and double - row angular contact ball bearings.
• Axial Rigidity: Four - point angular contact ball bearings offer good axial rigidity, resisting axial displacement under load and maintaining accurate shaft position. This is crucial in applications requiring high positional accuracy.

Advantages

• Space - Saving: Requiring less axial space than double - row angular contact ball bearings, they are suitable for applications with limited space, such as robotics, turntables, and indexing tables.
• Low Friction: Due to the rolling contact of the balls, these bearings exhibit relatively low friction, resulting in smooth operation and reduced energy consumption.

Applications

• Industrial Machinery: Commonly used in machine tools, printing presses, and robotics, they can handle high loads and provide excellent rigidity, meeting the requirements of precision applications.
• Automotive Industry: Used in steering systems, transmissions, and wheel hubs to handle high loads and offer reliable performance in harsh environments.
• Aerospace Engineering: Employed in aircraft landing gear and other critical aerospace applications. They can withstand extreme temperatures and harsh conditions, meeting the stringent requirements of aerospace.

Model Number	QJ series.
Type	Four point anuglar contact ball bearing.
Sealing type	open, ZZ, 2RS.
Material	supreme bearing steel AISI 52100.
Cage Material	steel, nylon, brass.
Hardness	HRC 60-64.
Radial Clearance	C0, C2, C3, C4, C5.
Vibration	Z1V1, Z2V2, Z3V3.
Precision Rating	ABEC-1, ABEC-3, ABEC-5.
Grease	As per your requirement, such as Chevron SRI-2 ,Multemp PS2, Shell Alvania R2, Changcheng 2 and so on.
Certifications	ISO 9001:2015.
Brand Name	TIK.
Package	Plastic tube package, single box package, industrial rolled package or as per buyer's requirement.
Place of Origin	China (Mainland).
Features	(1) High precision;
	(2) High speed;
	(3) Low noise;
	(4) Long life span.
Payment Term	TT, L/C, Western Union or Paypal.
Port	Shanghai, Tianjin, Qingdao or Ningbo.
Samples	Free samples are available.

Designation	Principal dimensions			Basic load ratings		Fatigue load limit	Speed ratings
				dynamic	static		Limiting speed
	d	D	B	C	C0	Pu
	mm			kN		kN	r/min
QJ 202 N2MA	15	35	11	12.7	8.3	0.355	36000
QJ 203 N2MA	17	40	12	17	11.4	0.48	30000
QJ 303 N2MA	17	47	14	23.4	15	0.64	28000
QJ 304 MA	20	52	15	32	21.6	0.93	24000
QJ 304 N2PHAS	20	52	15	32	21.6	0.93	24000
QJ 304 N2MA	20	52	15	32	21.6	0.93	24000
QJ 205 MA	25	52	15	27	21.2	0.9	22000
QJ 305 MA	25	62	17	42.5	30	1.27	20000
QJ 305 N2MA	25	62	17	42.5	30	1.27	20000
QJ 205 N2MA	25	52	15	27	21.2	0.9	22000
QJ 206 MA	30	62	16	37.5	30.5	1.29	19000
QJ 206 N2MA	30	62	16	37.5	30.5	1.29	19000
QJ 306 N2PHAS	30	72	19	53	41.5	1.76	17000
QJ 306 N2MA	30	72	19	53	41.5	1.76	17000
QJ 306 MA	30	72	19	53	41.5	1.76	17000
QJ 207 N2MA	35	72	17	49	41.5	1.76	17000
QJ 307 N2PHAS	35	80	21	64	51	2.16	15000
QJ 307 N2MA	35	80	21	64	51	2.16	15000
QJ 307 MA	35	80	21	64	51	2.16	15000
QJ 308 MA	40	90	23	78	64	2.7	14000
QJ 208 PHAS	40	80	18	56	49	2.08	15000
QJ 208 MA	40	80	18	56	49	2.08	15000
QJ 308 N2MA	40	90	23	78	64	2.7	14000
QJ 308 N2PHAS	40	90	23	78	64	2.7	14000
QJ 208 N2MA	40	80	18	56	49	2.08	15000
QJ 309 PHAS	45	100	25	100	83	3.55	12000
QJ 209 MA	45	85	19	63	56	2.36	14000
QJ 309 N2PHAS	45	100	25	100	83	3.55	12000
QJ 309 MA	45	100	25	100	83	3.55	12000
QJ 309 N2MA	45	100	25	100	83	3.55	12000
QJ 210 MA	50	90	20	65.5	61	2.6	13000
QJ 310 MA	50	110	27	118	100	4.25	11000
QJ 310 PHAS	50	110	27	118	100	4.25	11000
QJ 211 MA	55	100	21	85	83	3.55	11000
QJ 211 N2MA	55	100	21	85	83	3.55	11000
QJ 311 N2MA	55	120	29	137	118	5	10000
QJ 311 MA	55	120	29	137	118	5	10000
QJ 312 PHAS	60	130	31	156	137	5.85	9000
QJ 312 N2MA	60	130	31	156	137	5.85	9000
QJ 212 MA	60	110	22	96.5	93	4	10000
QJ 212 N2PHAS	60	110	22	96.5	93	4	10000
QJ 312 MA	60	130	31	156	137	5.85	9000
QJ 212 N2MA	60	110	22	96.5	93	4	10000
QJ 213 N2MA	65	120	23	110	112	4.75	9500
QJ 213 N2PHAS	65	120	23	110	112	4.75	9500
QJ 313 MA	65	140	33	176	156	6.55	8500
QJ 313 N2PHAS	65	140	33	176	156	6.55	8500
QJ 213 MA	65	120	23	110	112	4.75	9500
QJ 214 MA	70	125	24	120	122	5.2	9000
QJ 314 MA	70	150	35	200	180	7.35	8000
QJ 314 N2MA	70	150	35	200	180	7.35	8000
QJ 214 N2MA	70	125	24	120	122	5.2	9000
QJ 314 N2PHAS	70	150	35	200	180	7.35	8000
QJ 214 N2PHAS	70	125	24	120	122	5.2	9000
QJ 315 N2MA	75	160	37	216	200	7.8	7500
QJ 315 N2PHAS	75	160	37	216	200	7.8	7500
QJ 215 N2PHAS	75	130	25	125	132	5.6	8500
QJ 215 MA	75	130	25	125	132	5.6	8500
QJ 215 N2MA	75	130	25	125	132	5.6	8500
QJ 216 N2MA	80	140	26	146	156	6.4	8000
QJ 216 MA	80	140	26	146	156	6.4	8000
QJ 316 N2PHAS	80	170	39	232	228	8.65	7000
QJ 316 N2MA	80	170	39	232	228	8.65	7000
QJ 1017 N2MA/C4	85	130	22	99.5	114	4.65	8000
QJ 317 N2MA	85	180	41	250	255	8.65	6700
QJ 217 N2MA	85	150	28	156	173	6.7	7500
QJ 217 MA	85	150	28	156	173	6.7	7500
QJ 318 N2PHAS	90	190	43	285	305	11	6300
QJ 318 N2MA	90	190	43	285	305	11	6300
QJ 218 N2MA	90	160	30	186	200	7.65	7000
QJ 319 N2PHAS	95	200	45	305	340	11.8	6000
QJ 219 N2MA	95	170	32	212	232	8.5	6700
QJ 319 N2MA	95	200	45	305	340	11.8	6000
QJ 219 N2PHAS	95	170	32	212	232	8.5	6700
QJ 220 N2MA	100	180	34	236	265	9.5	6300
QJ 320 N2MA	100	215	47	345	400	13.7	5600
QJ 1021 N2MA/C4	105	160	26	135	170	6.3	6700
QJ 222 N2MA	110	200	38	280	325	11.2	5600
QJ 322 N2MA	110	240	50	390	480	15.3	4800
QJ 1022 N2MA/C4	110	170	28	153	193	6.8	6300
QJ 324 N2MA	120	260	55	415	530	16.3	4500
QJ 224 N2MA	120	215	40	300	365	12	5000
QJ 326 N2MA	130	280	58	455	610	18	4000
QJ 226 N2MA	130	230	40	310	400	12.7	4800
QJ 228 N2MA	140	250	42	345	475	14.3	4300
QJ 328 N2MA	140	300	62	500	695	20	3800
QJ 330 N2MA	150	320	65	530	765	21.2	3600
QJ 230 N2MA	150	270	45	400	570	16.6	4000
QJ 1030 N2MA	150	225	35	242	335	10.4	4500
QJ 232 N2MA	160	290	48	450	670	19	3800
QJ 332 N2MA	160	340	68	570	880	23.6	3400
QJ 1032 N2MA	160	240	38	270	380	11.4	4300
QJ 334 N2MA	170	360	72	655	1040	27	3200
QJ 234 N2MA	170	310	52	455	720	20	3400
QJ 236 N2MA	180	320	52	475	765	20.8	3400
QJ 336 N2MA	180	380	75	680	1100	28	3000
QJ 238 N2MA	190	340	55	510	850	22.4	3200
QJ 1038 N2MA	190	290	46	364	560	15.3	3400
QJ 338 N2MA	190	400	78	702	1160	28.5	2800
QJ 1040 N2MA	200	310	51	390	620	16.6	3200
QJ 240 N2MA	200	360	58	540	915	23.2	3000
QJ 1240 N2MA	200	360	70	520	865	21.6	3000
QJ 344 N2MA	220	460	88	780	1400	32	2400
QJ 344 N2/309829	220	460	88	904	1660	38	2400
QJ 1244 N2MA	220	400	78	592	1020	24.5	2600
QJ 248 N2MA	240	440	72	650	1200	27.5	2400
QJ 1248 MA/344524	240	440	85	663	1220	28	2400
QJ 1252 N2MA	260	480	90	741	1460	32	2200
QJ 252 N2MA	260	480	80	728	1430	32	2200
QJ 1252 MA	260	480	90	741	1460	32	2200
QJ 1056 N2MA/C4	280	420	65	585	1140	25.5	2400
QJ 1256 N2MA	280	500	90	728	1460	31.5	2000
QJ 1260 N2MA	300	540	98	832	1760	36.5	1900
QJ 1060 N2MA	300	460	74	650	1340	29	2200
QJ 1060 MA	300	460	74	702	1430	31	2200
QJ 1064 N2MA	320	480	74	715	1530	32	2000
QJ 1264 N2MA	320	580	105	956	2080	41.5	1700
QJ 1064 MA	320	480	74	715	1530	32	2000
QJ 1068 N2MA	340	520	82	780	1700	35.5	1800
QJ 1268 MA/344524	340	620	118	1060	2450	47.5	1600
QJ 1072 N2MA	360	540	82	852	1930	38	1700
QJ 1272 N2MA	360	650	122	1110	2600	49	1500
QJ 1276 N2MA	380	680	132	1170	2850	52	1400
QJ 1076 N2MA	380	560	82	884	2040	40	1600
QJ 1280 N2MA	400	720	140	1300	3250	58.5	1300
QJ 1080 N2MA	400	600	90	904	2160	40.5	1500
QJ 1084 N2MA	420	620	90	923	2280	42.5	1500
QJ 1984 MA	420	560	65	637	1600	30.5	1600
QJ 1284 N2MA	420	760	150	1430	3750	64	1300
QJ 1988 N2MA	440	600	74	761	1900	35.5	1500
QJ 1088 N2MA	440	650	94	995	2500	45.5	1400
QJ 1288 N2MA	440	790	155	1400	3750	64	1200
QJ 1292 N2MA	460	830	165	1530	4250	69.5	1100
QJ 1092 N2MA	460	680	100	1040	2650	46.5	1300
QJ 1296 N2MA	480	870	170	1680	4750	76.5	1100
QJ 1096 N2MA	480	700	100	1060	2800	48	1300

FAQ

Q1: Are you a manufacturer or a trading company?
A: We have been a professional manufacturer of bearings since 1995 with ISO9001:2015 certificate.

Q2: How is the quality level of your bearings?
A: Our bearings are made of supreme GCr15 bearing steel and are produced with the first class workmanship. The tolerance grade could be P0, P6, P5, P4. The vibration level could be Z1V1, Z2V2, Z3V3.

Q3: Can I get samples to see the quality?
A: Yes, samples are free, but the courier charge shall be borne by the buyer.

Q4: Could you offer OEM service and print my logo/mark on the products?
A: Yes, we could. Please send us your mark registration files, we shall print your logo/mark on the bearings and package.

Q5: How is the lead time?
A: For regular items that are in stock, we could make shipment immediately right after your payment. If the goods are not in stock, our production time is from 15 to 45 days according to the quantity.

Q6: What if I receive defective product for my order?
A: All our bearings are 100% inspected strictly before packing. If you receive any defective product, please provide us photos or videos to show the problem. After confirmation, we shall send you the new product as replacement free of charge.

Q7: What is your term of payment?
A: Term of payment is negotiable. Usually it is 30% deposit in advance, and the balance 70% is paid when the goods are ready for shipment.