The QJ300 series double row angular contact ball bearing is a high-performance bearing designed to withstand simultaneous radial and axial loads. This kind of bearing adopts a double-row ball design, which can provide higher load-bearing capacity and rigidity, and is suitable for high-speed and heavy-load applications. The features of the QJ300 series include high-quality steel, precise processing technology and excellent lubrication performance, giving it a long service life and reliability during use. This series of bearings are widely used in machinery manufacturing, automobiles, aerospace and other industrial fields, and are particularly suitable for occasions requiring high precision and stability.
Product parameters
| Designation | Principal dimensions(mm) | Basic load ratings(KN) | Basic load ratings(kgf) | Limiting Speed (rpm) | Distance of action point | Installation dimensions(mm) | Weight | ||||||||
| d | D | B | r(min) | Cr | Cor | Cr | Cor | Grease | Oil | a0(mm) | da(min) | Da(max) | ra(max) | (kg) | |
| QJ306 | 30 | 72 | 19 | 1.1 | 46000 | 63000 | 4700 | 6450 | 8000 | 11000 | 35.7 | 37 | 65 | 1 | 0.42 |
| QJ307 | 35 | 80 | 21 | 1.5 | 55000 | 80000 | 5600 | 8150 | 7100 | 9500 | 40.3 | 44 | 71 | 1.5 | 0.57 |
| QJ308 | 40 | 90 | 23 | 1.5 | 67000 | 100000 | 6850 | 10200 | 6300 | 8500 | 45.5 | 49 | 81 | 1.5 | 0.78 |
| QJ309 | 45 | 100 | 25 | 1.5 | 87500 | 133000 | 8900 | 13500 | 5600 | 7500 | 50.8 | 54 | 91 | 1.5 | 1.05 |
| QJ310 | 50 | 110 | 27 | 2 | 102000 | 159000 | 10400 | 16200 | 5000 | 6700 | 56 | 60 | 100 | 2 | 1.35 |
| QJ311 | 55 | 120 | 29 | 2 | 118000 | 187000 | 12000 | 19100 | 4500 | 6300 | 61.3 | 65 | 110 | 2 | 1.75 |
| QJ312 | 60 | 130 | 31 | 2.1 | 135000 | 217000 | 13800 | 22200 | 4300 | 5600 | 66.5 | 72 | 118 | 2 | 2.15 |
| QJ313 | 65 | 140 | 33 | 2.1 | 153000 | 250000 | 15600 | 25500 | 3800 | 5300 | 71.8 | 77 | 128 | 2 | 2.7 |
| QJ314 | 70 | 150 | 35 | 2.1 | 172000 | 285000 | 17500 | 29100 | 3600 | 5000 | 77 | 82 | 138 | 2 | 3.18 |
| QJ315 | 75 | 160 | 37 | 2.1 | 187000 | 320000 | 19100 | 33000 | 3400 | 4800 | 82.3 | 87 | 148 | 2 | 3.9 |
| QJ316 | 80 | 170 | 39 | 2.1 | 202000 | 360000 | 20600 | 37000 | 3200 | 4300 | 87.5 | 92 | 158 | 2 | 4.6 |
| QJ317 | 85 | 180 | 41 | 3 | 218000 | 405000 | 22300 | 41000 | 3000 | 4000 | 92.8 | 99 | 166 | 2.5 | 5.34 |
| QJ318 | 90 | 190 | 43 | 3 | 235000 | 450000 | 23900 | 45500 | 2800 | 3800 | 98 | 104 | 176 | 2.5 | 6.4 |
| QJ319 | 95 | 200 | 45 | 3 | 251000 | 495000 | 25600 | 50500 | 2600 | 3600 | 103.3 | 109 | 186 | 2.5 | 7.4 |
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