Prelubricated Bushings
SF-20 Prelubricated bearings

1、 POM with lead 0.3-0.5mm
2、Porous bronze 0.2-0.3mm
3、Steel backing
4、Copper plating 0.002m
■Tech.Data
| Max.Load | Static | 250N/mm2 | Friction Cofee. | 0.05-0.25u | |
| Dynamic | 140N/mm2 | Speed limit(Oil) | 2.5m/s | ||
| Oscillating | 60N/mm2 | Thermal conductivity | 2.03Kcal/M.br.C | ||
| PV limit | Dry | 2.8N/mm2×m/s | Coeff.of linear expansion | 51×10-6per℃ | |
| Oil | 22N/mm2×m/s | ||||
| Initial pre-lubrication at assembly required | |||||
| Temp.limit | -40℃~+130℃ |
■ Application characteristics
1、 It is superior to those known marginal lubricating materials when lacking of lubrication oil.
2、Owing to its thick and hard surface of friction, it has the advantage of low wear.
3、 High mechanical strength,it can stand heavy dynamic and static load. It is used in high load capacities and low speed with rotational, oscillating or frequent stop-start motion.
4、 It can work long time without oil in the condition of boundary lubrcation,under oil or grease lubrication Interval, the work is longer.
5、 It is machinable for the thicker of POM.
6、 The bushes can be applied in auto chassis, forging machine, metallurgical, civil engineering, power station, strip rolling industries etc.
■ Provide standardized products:Cylindrical bushes P15、P18,thrust washers P17、P19, flat strip material P17.
provide non-standardized products:Cylindrical bushes, flanged bushes,trrust washers,flat strip material,half bearing,wear plate,SF-20 with steel bush.
| Unit:mm |
| Recommended | OD.D | Wall Thickness t | Hole Dia. h | t1 | t2 | Bearing Length and Part Number | |||||||||||
| shaft Dia. | Housing Bore | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 | ||||||||
| 10 | -0.013 -0.028 | 12 | +0.0180 | 12 | +0.065+0.030 | 1.00-0.030 | 4 | 0.5 | 0.3 | 1010 | 1015 | 1020 | |||||
| 12 | -0.016 -0.034 | 14 | 14 | 1210 | 1215 | 1220 | |||||||||||
| 14 | 16 | 16 | 1410 | 1415 | 1420 | ||||||||||||
| 15 | 17 | 17 | 1510 | 1515 | 1520 | 1525 | |||||||||||
| 16 | 18 | 18 | 1610 | 1615 | 1620 | 1625 | |||||||||||
| 18 | 20 | +0.0210 | 20 | 1810 | 1815 | 1820 | 1825 | ||||||||||
| 20 | -0.080-0.041 | 23 | 23 | 1.5 0-0.035 | 0.8 | 0.4 | 2010 | 2015 | 2020 | 2025 | |||||||
| 22 | 25 | 25 | +0.075 | 6 | 2210 | 2215 | 2220 | 2225 | |||||||||
| 24 | 27 | 27 | +0.035 | 2410 | 2415 | 2420 | 2425 | 2430 | |||||||||
| 25 | 28 | 28 | 2515 | 2520 | 2525 | 2530 | |||||||||||
| 26 | 30 | 30 | 2.0 0-0.040 | 1.0 | 0.6 | 2615 | 2620 | 2625 | 2630 | ||||||||
| 28 | 32 | +0.0250 | 32 | 2815 | 2820 | 2825 | 2830 | 2840 | |||||||||
| 30 | 34 | 34 | 3015 | 3020 | 3025 | 3030 | 3040 | ||||||||||
| 32 | -0.025-0.090 | 36 | 36 | +0.085 | 3215 | 3220 | 3225 | 3230 | 3240 | ||||||||
| 35 | 39 | 39 | +0.045 | 3520 | 3525 | 3530 | 3550 | ||||||||||
| 38 | 42 | 42 | 3820 | 3825 | 3830 | 3840 | 3850 | ||||||||||
| 40 | 44 | 44 | 8 | 4020 | 4025 | 4030 | 4040 | 4050 |
| Other lengths made to order |
| Unit:mm |
| Recommended | OD.D | Wall Thickness t | Hole Dia.h | t1 | t2 | Bearing Length and Part Number | |||||||||||
| Shaft Dia. | Housing Bore | 40 | 50 | 60 | 65 | 80 | 90 | 95 | 100 | ||||||||
| 65 | 0-0.046 | 70 | +0.0300 | 70 | +0.100+0.055 | 2.5-0.040-0.085 | 8 | 1.2 | 0.8 | 6540 | 6560 | ||||||
| 70 | 75 | 75 | 7040 | 7050 | 7065 | 7085 | |||||||||||
| 75 | 80 | 80 | 9.5 | 1.4 | 0.8 | 7540 | 7560 | 7680 | |||||||||
| 80 | 85 | +0.0350 | 85 | +0.120+0.070 | -0.050-0.115 | 8040 | 8060 | 8080 | |||||||||
| 85 | 0-0.054 | 90 | 90 | 8540 | 8560 | 8580 | |||||||||||
| 90 | 95 | 95 | 9040 | 9060 | 9080 | 9090 | |||||||||||
| 100 | 105 | 105 | 10050 | 10080 | 10095 | ||||||||||||
| 105 | 110 | 110 | 10560 | 10580 | 10595 | 105100 | |||||||||||
| 110 | 115 | 115 | 11060 | 11080 | 11095 | 110100 | |||||||||||
| 120 | 125 | +0.0400 | 125 | +0.170+0.100 | 12060 | 12080 | 120100 | ||||||||||
| 125 | 0-0.063 | 130 | 130 | 12560 | 12580 | 125100 | |||||||||||
| 130 | 135 | 135 | 13050 | 13060 | 13080 | 130100 | |||||||||||
| 140 | 145 | 145 | 14050 | 14060 | 14080 | 140100 | |||||||||||
| 150 | 155 | 155 | 15050 | 15060 | 15080 | 150100 | |||||||||||
| 160 | 165 | 165 | 16050 | 16060 | 16080 | 160100 | |||||||||||
| 170 | 175 | 175 | 17050 | 17060 | 17080 | 170100 | |||||||||||
| 180 | 185 | +0.0460 | 185 | +0.210+0.130 | 18050 | 18060 | 18080 | 180100 | |||||||||
| 190 | 0-0.072 | 195 | 195 | 19050 | 19060 | 19080 | 190100 | ||||||||||
| 200 | 205 | 205 | 20050 | 20060 | 20080 | 200100 | |||||||||||
| 220 | 225 | 225 | 22050 | 22060 | 22080 | 220100 | |||||||||||
| 240 | 245 | 245 | 24050 | 24060 | 24080 | 240100 | |||||||||||
| 250 | 255 | +0.0520 | 255 | +0.260+0.170 | 25050 | 25060 | 25080 | 250100 | |||||||||
| 260 | 0-0.081 | 265 | 265 | 26050 | 26060 | 26080 | 260100 | ||||||||||
| 280 | 285 | 285 | 28050 | 28060 | 28080 | 280100 | |||||||||||
| 300 | 305 | 305 | 30050 | 30060 | 30080 | 300100 |
| Other lengths made to order |
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