The four-point contact ball bearing is the kind of bearing which can be separable. The 0000 type has a double semi-inner ring, and the OJ0000 type has a double semi-outer ring, and the contact angle is 35°. When there is pure radial load or no load, the steel ball and the ring are in four-point contact; under the action of pure axial load, the steel ball and the ring are in two-point contact and can withstand bidirectional axial load. This type of bearing can also withstand moment loads and combine the functions of single row and double row angular contact ball bearings. This kind of bearing can only guarantee normal operation when two-points contact is formed.
Technical parameters of four-point contact ball bearing:
| Item | (d) Bore Diameter (mm) | (D) Outside Diameter (mm) | (B) Width (mm) | (C) Dynamic Load (N) | (Co) Static Load (N) | (Grease) Lubrication Speed (r/min) | (Oil) Lubrication Speed (r/min) |
| QJ 203 | 17 | 40 | 12 | 15900 | 10600 | 14000 | 19000 |
| QJ 205 | 25 | 52 | 15 | 25100 | 20000 | 9500 | 14000 |
| QJ 206 | 30 | 62 | 16 | 35100 | 28500 | 8500 | 12000 |
| QJ 207 | 35 | 72 | 17 | 46200 | 39000 | 7500 | 10000 |
| QJ 208 | 40 | 80 | 18 | 52700 | 45000 | 6700 | 9000 |
| QJ 209 | 45 | 85 | 19 | 58500 | 51000 | 6300 | 8500 |
| QJ 210 | 50 | 90 | 20 | 61800 | 56000 | 5600 | 7500 |
| QJ 211 | 55 | 100 | 21 | 79300 | 76500 | 5300 | 7000 |
| QJ 212 | 60 | 110 | 22 | 92300 | 86500 | 4800 | 6300 |
| QJ 213 | 65 | 120 | 23 | 104000 | 104000 | 4300 | 5600 |
| QJ 214 | 70 | 125 | 24 | 114000 | 114000 | 4300 | 5600 |
| QJ 215 | 75 | 130 | 25 | 117000 | 122000 | 4000 | 5300 |
| QJ 216 | 80 | 140 | 26 | 138000 | 146000 | 3600 | 4800 |
| QJ 217 | 85 | 150 | 28 | 148000 | 160000 | 3400 | 4500 |
| QJ 218 N2 | 90 | 160 | 30 | 174000 | 186000 | 3200 | 4300 |
| QJ 219 N2 | 95 | 170 | 32 | 199000 | 212000 | 3000 | 4000 |
| QJ 220 N2 | 100 | 180 | 34 | 225000 | 240000 | 2800 | 3800 |
| QJ 222 N2 | 110 | 200 | 38 | 265000 | 305000 | 2400 | 3400 |
| QJ 224 N2 | 120 | 215 | 40 | 286000 | 340000 | 2200 | 3200 |
| QJ 226 N2 | 130 | 230 | 40 | 296000 | 365000 | 1900 | 2800 |
| QJ 228 N2 | 140 | 250 | 42 | 325000 | 440000 | 1800 | 2600 |
| QJ 230 N2 | 150 | 270 | 45 | 338000 | 465000 | 1700 | 2400 |
| QJ 232 N2 | 160 | 290 | 48 | 390000 | 570000 | 1600 | 2200 |
| QJ 234 N2 | 170 | 310 | 52 | 397000 | 600000 | 1600 | 2200 |
| QJ 236 N2 | 180 | 320 | 52 | 436000 | 680000 | 1500 | 2000 |
| QJ 248 | 240 | 440 | 72 | 650000 | 1200000 | 1000 | 1500 |
| QJ 303 | 17 | 47 | 14 | 23400 | 15000 | 12000 | 17000 |
| QJ 304 | 20 | 52 | 15 | 29600 | 20000 | 10000 | 15000 |
| QJ 306 | 30 | 72 | 19 | 49400 | 39000 | 7500 | 10000 |
| QJ 307 | 35 | 80 | 21 | 59200 | 46500 | 7000 | 9500 |
| QJ 308 | 40 | 90 | 23 | 71500 | 58500 | 6300 | 8500 |
| QJ 309 | 45 | 100 | 25 | 93600 | 76500 | 5600 | 7500 |
| QJ 310 | 50 | 110 | 27 | 111000 | 91500 | 5000 | 6700 |
| QJ 311 | 55 | 120 | 29 | 127000 | 108000 | 4500 | 6000 |
| QJ 312 | 60 | 130 | 31 | 146000 | 125000 | 4300 | 5600 |
| QJ 313 | 65 | 140 | 33 | 165000 | 146000 | 4000 | 5300 |
| QJ 314 | 70 | 150 | 35 | 186000 | 166000 | 3600 | 4800 |
| QJ 315 N2 | 75 | 160 | 37 | 199000 | 186000 | 3400 | 4500 |
| QJ 316 N2 | 80 | 170 | 39 | 216000 | 208000 | 3200 | 4300 |
| QJ 317 N2 | 85 | 180 | 41 | 234000 | 236000 | 3000 | 4000 |
| QJ 318 N2 | 90 | 190 | 43 | 265000 | N/A | 2800 | 3800 |
| QJ 319 N2 | 95 | 200 | 45 | 286000 | 315000 | 2600 | 3600 |
| QJ 320 N2 | 100 | 215 | 47 | 307000 | 340000 | 2400 | 3400 |
| QJ 322 N2 | 110 | 240 | 50 | 364000 | 430000 | 2000 | 3000 |
| QJ 324 N2 | 120 | 260 | 55 | 390000 | 490000 | 1900 | 2800 |
| QJ 326 N2 | 130 | 280 | 58 | 423000 | 560000 | 1800 | 2600 |
| QJ 328 N2 | 140 | 300 | 62 | 468000 | 640000 | 1700 | 2400 |
| QJ 330 N2 | 150 | 320 | 65 | 494000 | 710000 | 1600 | 2200 |
| QJ 332 | 160 | 340 | 68 | 540000 | 815000 | 1500 | 2000 |
| QJ 334 N2 | 170 | 360 | 72 | 618000 | 965000 | 1400 | 1900 |
| QJ 336 N2 | 180 | 380 | 75 | 637000 | 1020000 | 1300 | 1800 |
| QJ 344 | 220 | 460 | 88 | 780000 | 1400000 | 1000 | 1500 |
ZYS Precision Bearing Quality Control and Assurance:
Austrian AICHELIN heat treatment equipment and long-life heat treatment process provide a strong guarantee for the continuous and reliable operation of bearings.
ZYS MANUFACTURING CAPACITY
ZYS Quality assurance 
ZYS bearing products
Q: Are you trading company or manufacturer?
A: ZYS is bearing manufacturer, the only first-class comprehensive research institute in China bearing industry.
Q: How do you control quality of bearing?
A: ZYS has established quality control systems for each kind of bearing and spindle. All products and services passed ISO9001-2008 Quality Certificate.
Q: What is the MOQ?
A: It depends on the bearing type. You can send inquiry or send e-mail for more information.
Q: How about the package?
A: Industrial packing in general condition (Plastic tube+ carton+ pallet). Accept design package when OEM.
Q: How long is the delivery time?
A: It will take about 10 to 40 days, depends on the model and quantity.
Q: How about the shipping?
A: We can arrange the shipment or you may have the forwarder.
Q: Is sample avaiable?
A: Yes, sample order is acceptable.
Q: Can we use our own LOGO or design on bearings?
A: Yes. OEM is acceptable. We can design the bearing with your requirements and use your own LOGO and package design.
Address: No. 1 Jilin Road, Luoyang City, Henan, Province, China.
Zip Code: 471039
Website: chinazys.en.made-in-china.com