Cylindrical roller bearings are manufactured using a process centered around “high-precision forming and optimized load-bearing performance,” making them suitable for high-speed, heavy-load applications. High-carbon chromium bearing steel is carefully selected and vacuum-refined to remove impurities, enhancing base material uniformity and fatigue resistance.
The rollers utilize a process consisting of “cold heading in one step, cylindrical surface grinding, and super-finishing,” achieving a diameter tolerance of IT3 and a surface roughness of Ra ≤ 0.1 μm, ensuring a close fit with the raceway. The raceways of the rings are machined using a five-axis CNC grinder, achieving geometric accuracy of IT4. Precision milling of the ribs ensures stable axial positioning of the rollers.
Key components undergo full quenching and tempering, followed by cryogenic treatment, to prevent dimensional deformation during use. Assembly is completed in a Class 1000 cleanroom. Specialized tooling is used to precisely control radial clearance, and stamped or solid cages are used to ensure uniform roller distribution. The finished product undergoes dynamic balancing, rotational noise, and rated load testing before being qualified for high-precision transmission applications such as motors and machine tool spindles.
| Boundary dimensions (mm) | Load ratings (KN) | Limiting speeds (r/min) | Mass | Bearing NO. | ||||
|---|---|---|---|---|---|---|---|---|
| d | D | B | Cr | Cor | Grease | Oil | (kg) | WSBC |
| 170 | 360 | 120 | 1740 | 2210 | – | 3800 | 57.5 | LSL192334-TB |
| 25 | 62 | 24 | 68 | 54 | – | 16400 | 0.36 | ZSL192305 |
| 30 | 72 | 27 | 94 | 80 | – | 13900 | 0.55 | ZSL192306 |
| 35 | 80 | 31 | 118 | 101 | – | 11900 | 0.72 | ZSL192307 |
| 40 | 90 | 33 | 160 | 142 | – | 10400 | 1 | ZSL192308 |
| 45 | 100 | 36 | 171 | 157 | – | 9700 | 1.34 | ZSL192309 |
| 50 | 110 | 40 | 219 | 199 | – | 8800 | 1.76 | ZSL192310 |
| 55 | 120 | 43 | 255 | 231 | – | 7900 | 2.22 | ZSL192311 |
| 60 | 130 | 46 | 270 | 255 | – | 7400 | 2.82 | ZSL192312 |
| 65 | 140 | 48 | 335 | 320 | – | 6800 | 3.44 | ZSL192313 |
| 70 | 150 | 51 | 360 | 355 | – | 6500 | 4.27 | ZSL192314 |
| 75 | 160 | 55 | 435 | 435 | – | 6000 | 5.2 | ZSL192315 |
| 80 | 170 | 58 | 510 | 520 | – | 5500 | 6.2 | ZSL192316 |
| 80 | 180 | 60 | 540 | 570 | – | 5200 | 7.23 | ZSL192317 |
| 90 | 190 | 64 | 590 | 610 | – | 5200 | 8.7 | ZSL192318-TB |
| 95 | 200 | 67 | 620 | 660 | – | 4850 | 10 | ZSL192319-TB |
| 100 | 215 | 73 | 750 | 790 | – | 4550 | 12.7 | ZSL192320-TB |
| 110 | 240 | 80 | 890 | 900 | – | 3950 | 16.5 | ZSL192322-TB |
| 120 | 260 | 86 | 1060 | 1140 | – | 3700 | 21.9 | ZSL192324-TB |
| Replacement number | Original code | Other sizes (mm) | r(mm) | Basic rated load (kN) | weight (kg) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| (Designations) | (Old spec) | D | D₁ | B | T | r₁ | r(mm) | Ca | C₀a | Weight |
| 382930 | 2077930 | 150 | 210 | 165 | 165 | 2.5 | 2 | 600 | 1590 | 21.2 |
| 381030X2 | 77730 | 150 | 225 | 136 | 136 | 3 | 2.5 | 540 | 1460 | 17.7 |
| 382034 | 2077134 | 170 | 260 | 230 | 230 | 3 | 2.5 | 1270 | 3250 | 43 |
| 382040 | 77736 | 180 | 280 | 180 | 180 | 3 | 2.5 | 835 | 2540 | 39.6 |
| 381040X2 | 77740 | 200 | 310 | 200 | 200 | 3 | 2.5 | 1970 | 4720 | 55.6 |
| 382044 | 2077140 | 200 | 310 | 275 | 275 | 3 | 2.5 | 1760 | 4780 | 80.7 |
| 382048 | 77741 | 205 | 320 | 205 | 205 | 4 | 3 | 1060 | 2850 | 58.8 |
| 382952 | 2077144 | 220 | 360 | 305 | 305 | 4 | 3 | 1600 | 3200 | 90.1 |
| 382048 | 2077148 | 240 | 340 | 310 | 310 | 4 | 3 | 2110 | 5610 | 105 |
| 381050X2 | 207750 | 250 | 360 | 270 | 270 | 5 | 4 | 2250 | 6400 | 79.8 |
| 382052 | 77752 | 260 | 460 | 265 | 265 | 5 | 2.5 | 1760 | 4220 | 117 |
| 382052X2 | 2077152 | 260 | 400 | 345 | 345 | 3.7 | 7.5 | 2710 | 7140 | 153 |
| 382052 | 2077152 | 260 | 440 | 330 | 284 | 3.7 | 1.5 | 3235 | 8563 | 140 |
| 381052 | 77752 | 260 | 420 | 250 | 250 | 2 | 5 | 2670 | 5850 | 182 |
| 381156 | 77756 | 280 | 420 | 300 | 300 | 5 | 5 | 1540 | 5300 | 119 |
| 382960 | 2077156 | 280 | 460 | 345 | 345 | 5 | 4 | 2150 | 4530 | 191 |
| 381156 | 1077756 | 280 | 420 | 324 | 324 | 5 | 4 | 2840 | 7290 | 200 |
| 382060 | 2077960 | 300 | 460 | 300 | 300 | 4 | 3 | 2330 | 8100 | 130 |
| 382960X2 | 777860 | 300 | 420 | 310 | 310 | 4 | 3 | 2020 | 7210 | 134 |
| 382064 | 2077160 | 300 | 500 | 390 | 390 | 5 | 4 | 3850 | 10200 | 232 |
| 382060 | 77760 | 300 | 460 | 350 | 350 | 5 | 4 | 2730 | 8900 | 280 |
| 382968 | 77764 | 320 | 460 | 380 | 380 | 5 | 4 | 2100 | 9330 | 210 |
| 381168 | 2077164 | 320 | 480 | 390 | 390 | 6 | 5 | 3180 | 8000 | 234 |
| 381168 | 2077968 | 340 | 460 | 310 | 310 | 4 | 3 | 2480 | 8100 | 147 |
| 382972 | 77768 | 340 | 460 | 325 | 325 | 5 | 4 | 3200 | 8200 | 247 |
| 381168 | 1077782 | 340 | 580 | 425 | 425 | 5 | 4 | 4580 | 11700 | 441 |
| 381072 | 2077972 | 360 | 480 | 310 | 310 | 4 | 3 | 2687 | 8920 | 175 |
| 381172 | 77872 | 360 | 460 | 375 | 375 | 4 | 4 | 2550 | 11800 | 197 |
| 381072 | 77172 | 360 | 540 | 325 | 325 | 5 | 4 | 3360 | 8870 | 248 |
| 381172 | 1077772 | 360 | 500 | 420 | 420 | 6 | 6 | 7900 | 5610 | 388 |
| 381176 | 77776 | 380 | 550 | 330 | 350 | 5 | 5 | 2490 | 9540 | 273 |
| 381176X2 | 1077776 | 380 | 620 | 388 | 388 | 6 | 6 | 3450 | 11600 | 443 |
| 381060 | 1077776 | 380 | 540 | 420 | 420 | 5 | 4 | 4710 | 12300 | 485 |
| 380789 | 77779 | 395 | 625 | 268 | 268 | 3.7 | 7.5 | 2130 | 6500 | 191 |
| 381180 | 77780 | 400 | 540 | 356 | 356 | 3.7 | 7.5 | 2450 | 10400 | 317 |
| 381184 | 77180 | 400 | 600 | 280 | 280 | 6 | 5 | 4160 | 9030 | 595 |
| 381184 | 1077780 | 420 | 750 | 456 | 456 | 6 | 5 | 5100 | 18200 | 749 |
| 381982 | 77788 | 420 | 600 | 480 | 480 | 6 | 6 | 6050 | 18800 | 432 |
| 381098X2 | 77788K | 440 | 620 | 355 | 355 | 6 | 6 | 3350 | 12100 | 385 |
| 381996 | 1077992 | 460 | 620 | 310 | 310 | 5 | 4 | 3390 | 10200 | 173 |
| 381096 | 77892 | 460 | 650 | 474 | 474 | 6 | 6 | 4550 | 20000 | 506 |
| 381196 | 1077996 | 480 | 650 | 338 | 338 | 5 | 5 | 2450 | 5400 | 301 |
| 381196 | 77196 | 480 | 790 | 530 | 530 | 6 | 6 | 5800 | 16900 | 536 |
| 3819/500 | 779/500 | 500 | 700 | 420 | 420 | 7.5 | 5 | 3390 | 10500 | 1020 |
| 3819/500 | 779/500 | 500 | 800 | 365 | 365 | 5 | 5 | 4250 | 9120 | 565 |
| 3811/600 | 10779/600 | 600 | 720 | 420 | 420 | 6 | 5 | 4000 | 18100 | 489 |
| 3810/600 | 777/600 | 600 | 800 | 380 | 380 | 5 | 4 | 8500 | 25400 | 536 |
| 3811/600 | 10777/600 | 600 | 870 | 480 | 480 | 6 | 6 | 8370 | 36700 | 992 |
| 3819/630 | 10779/630 | 630 | 850 | 650 | 650 | 7.5 | 6 | 6440 | 19900 | 1970 |
| 3811/630 | 10777/630 | 630 | 980 | 418 | 418 | 7.5 | 7.5 | 9170 | 36800 | 720 |
| 3806/650 | 777/650 | 650 | 920 | 515 | 515 | 7.5 | 12 | 15000 | 42000 | 1158 |
| 3806/650 | 777/650 | 650 | 1030 | 560 | 560 | 7.5 | 12 | 16000 | 39300 | 1735 |
| 3811/710YA5 | 777/710K | 630 | 900 | 470 | 470 | 3 | 6 | 58350 | 27500 | 1450 |
| 3811/750 | 10777/750 | 710 | 1030 | 610 | 610 | 9.5 | 8 | 16100 | 68500 | 1140 |
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Strong assurance, ultra-high fitting accuracy, customized processes, and "one machine, one fit."
Optimized selection, full-process guidance; simulation analysis to mitigate operational risks.
24-hour response, spare parts inspection and repair, to ensure equipment operation.
Equipment monitors wear and vibration, customizes maintenance plans, and extends bearing life.
Operating condition research optimizes bearing solutions, adapts equipment, and upgrades old bearings.
We integrate advanced technology, strict quality control, and customized services to deliver reliable bearing products. Our team’s expertise ensures optimal performance for diverse industrial needs, from automotive to heavy machinery.
Tailored designs to match unique industrial scenarios and performance demands.
Stringent ISO-certified processes ensure durability and consistent performance.
Jinan Mingsheng Bearings relies on cutting-edge R&D technology, lean production processes, and excellent precision quality, providing efficient power support with high stability and low friction loss from core transmission systems to various auxiliary operating components.
We are committed to providing you with professional bearing products and services. If you have any needs or questions, please feel free to contact us and we will be happy to answer them for you.
