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| Brand Name : | QRL |
| Model Number : | 748S/742 |
| Certification : | ISO2000/9002 |
| Price : | Negotiable |
| Payment Terms : | L/C, D/A, D/P |
| Supply Ability : | 8000 PCS |
| Delivery Time : | time by quantity |
Dimension(s):
Inside Diameter (d) = 3"
Outside Diameter (D) = 5.909"
Combined Width (T) = 1.3/4"
Width (B) = 1.8375"
Cup Width (C) = 1.7/16"
Load Rating(s):
Basic Dynamic Load Rating (kN) = 261
Basic Static Load Rating (kN) = 360
Speed Limitation(s):
Limiting Speed - Grease Lubrication (min-1) = 2400
Limiting Speed - Oil Lubrication (min-1) = 3200
Alternative Part Number(s):
748S/742, 748S 742
Taper Roller Bearing Description
Tapered roller bearings are separable into a cone assembly and a cup. The non-separable cone assembly consists of the inner ring, the rollers, and a cage that retains and evenly spaces the rollers. The cup is simply the outer ring.
Tapered Roller Bearing Product number
| Designation | Dimensions | Basic Load Ratings | Limiting Speed | Mass | |||||||
| d | D | T | B | C | r1 | r | Cr | Cor | |||
| min. | min. | Dynamic | Static | ||||||||
| SFT | mm | kN | Rpm | g | |||||||
| 30203 | 17 | 40 | 13.25 | 12 | 11 | 1 | 1 | 20.7 | 21.9 | 9000 | 79 |
| 30303 | 17 | 47 | 15.25 | 14 | 12 | 1 | 1 | 28.3 | 27.2 | 8500 | 129 |
| 30204 | 20 | 47 | 15.25 | 14 | 12 | 1 | 1 | 28.2 | 30.6 | 8000 | 126 |
| 30304 | 20 | 52 | 16.25 | 15 | 13 | 1.5 | 1.5 | 33.1 | 33.2 | 8000 | 165 |
| 30205 | 25 | 52 | 16.25 | 15 | 13 | 1 | 1 | 32.2 | 37 | 7500 | 154 |
| 30305 | 25 | 62 | 18.25 | 17 | 15 | 1.5 | 1.5 | 46.9 | 48.1 | 6700 | 263 |
| 30206 | 30 | 62 | 17.25 | 16 | 14 | 1 | 1 | 43.3 | 50.5 | 6300 | 231 |
| 30306 | 30 | 72 | 20.75 | 19 | 16 | 1.5 | 1.5 | 59 | 63.1 | 5600 | 387 |
| 30207 | 35 | 72 | 18.25 | 17 | 15 | 1.5 | 1.5 | 54.2 | 63.5 | 5300 | 331 |
| 30307 | 35 | 80 | 22.75 | 21 | 18 | 2 | 1.5 | 75.3 | 82.6 | 5000 | 515 |
| 30208 | 40 | 80 | 19.75 | 18 | 16 | 1.5 | 1.5 | 63 | 74 | 4800 | 422 |
| 30308 | 40 | 90 | 25.25 | 23 | 20 | 2 | 1.5 | 90.9 | 107.6 | 4500 | 747 |
| 30209 | 45 | 85 | 20.75 | 19 | 16 | 1.5 | 1.5 | 67.9 | 83.6 | 4500 | 474 |
| 30309 | 45 | 100 | 27.25 | 25 | 22 | 2 | 1.5 | 108.9 | 129.8 | 4000 | 984 |
| 30210 | 50 | 90 | 21.75 | 20 | 17 | 1.5 | 1.5 | 73.3 | 92.1 | 4300 | 529 |
| 30310 | 50 | 110 | 29.25 | 27 | 23 | 2.5 | 2 | 130.1 | 157.1 | 3600 | 1280 |
| 30211 | 55 | 100 | 22.75 | 21 | 18 | 2 | 1.5 | 90.8 | 113.7 | 3800 | 713 |
| 30311 | 55 | 120 | 31.5 | 29 | 25 | 2.5 | 2 | 153.3 | 187.6 | 3200 | 1630 |
| 30212 | 60 | 110 | 23.75 | 22 | 19 | 2 | 1.5 | 103.3 | 130 | 3400 | 904 |
| 30312 | 60 | 130 | 33.5 | 31 | 26 | 3 | 2.5 | 171.4 | 210 | 3000 | 1990 |
| 30213 | 65 | 120 | 24.75 | 23 | 20 | 2 | 1.5 | 120.6 | 152.6 | 3000 | 1130 |
| 30313 | 65 | 140 | 36 | 33 | 28 | 3 | 2.5 | 195.9 | 241.7 | 2600 | 2440 |
| 30214 | 70 | 125 | 26.25 | 24 | 21 | 2 | 1.5 | 132.3 | 173.6 | 3000 | 1260 |
| 30314 | 70 | 150 | 38 | 35 | 30 | 3 | 2.5 | 21.9 | 271.7 | 2400 | 2980 |
Taper Roller Bearings Applications
Dedicated to strict quality control and thoughtful customer
service, our experienced staff members are always available to
discuss your requirements and ensure full customer satisfaction. In
recent years, our company has introduced a series of advanced
equipment including double-end face grinding machine etc., flaw
detector...In addition, we have obtained ISO9001: 2008
certificates. Selling well in all cities and provinces around
China, our products are also exported to clients in such countries
and regions as Europe, America, Middle East, Africa and Southeast
Asian.

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| Guangzhou Zhonglu Automobile Bearing Co., LTD |
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