Metallographic analysis and material microstructure
1. Polytetrafluoroethylene and fiber mixture 0.01-0.03mm
2. Spherical bronze powder 0.2-0.3mm
3. Steel back 0.7-2.3mm
4. Electroplated coating: Tin coating with a thickness of 0.005mm, or copper coating with a thickness of 0.008mm
Product Description
SF-1W lead-free bearing is a new product developed based on SF-1 material in accordance with international environmental requirements. This product is not only widely applicable to general machinery, but also particularly suitable for food machinery, pharmaceutical machinery, and tobacco machinery. Its lead-free effect meets European health standards and is the direction for the development of oil-free lubrication bearings.
technical parameter
Maximum bearing pressure: 140N/mm2
Applicable temperature range: -195~+280 degrees Celsius
Maximum sliding speed: 2m/s
Friction coefficient: 0.04~0.20
Maximum allowable PV value (dry): 3.6N/mm2. m/s
Maximum allowable PV value (oil): 50N/mm2. m/s
应用特点：
1. The mixture of PTFE and fibers can form a good transfer film to protect the grinding axis during movement
2. Because it does not contain lead, it is harmless to the human body
3. Has good load-bearing capacity and wear resistance
4. Copper and steel plates have good thermal conductivity
5. The surface electroplating layer has good corrosion resistance
6. The product has been widely used in food machinery, medical machinery, tobacco machinery, beverage machinery, and other green machinery. With
With the gradual development of international environmental protection, SF-1W will be a substitute for SF-1 products.
SF-1W 化学特性
Bearing model
In the air
In vacuum
Water
In vapor
In weak acids
Medium acid
In strong acids
In alkaline solution
SF-1
Okay
Okay
Okay
Okay
Poor
No
No
Okay
SF-1W End face friction and wear test
Model
Test time
Test conditions
friction coefficient
Final temperature
(Celsius)
Final wear amount
(mm)
lubrication
speed
pressure
SF-1W
3hr
dry
0.4m/s
3.5N/mm2
0.156
93
0.009
SF-1W
3hr
oil
0.4m/s
3.5N/mm2
0.056
52
0.01
SF-1W Standard tolerance dimension table
Unit:mm
Matching shaft diameter tolerance
Matching seat hole tolerance
(H7)
Bearing outer diameter tolerance
Bearing inner diameter tolerance after pressing into the seat hole
wall thickness
f1
f2
L0-0.40
(d≤φ30 L -0.3 d＞φ30 L -0.4)
6
8
10
12
15
20
25
30
40
50
60
6 -0.013 -0.028
8 +0.015
8 +0.055 +0.025
5.990
6.055
0.980
1.005
0.6
0.3
0606
0608
0610
8 -0.013 -0.028
10 +0.015
10 +0.055 +0.025
7.990
8.055
0806
0808
0810
08012
08015
10 -0.016 -0.034
12 +0.018
12 +0.065 +0.030
9.990
10.058
1006
1008
1010
1012
1015
1020
12 -0.016 -0.034
14 +0.018
14 +0.065 +0.030
11.990
12.058
1206
1208
1210
1212
1215
1220
1225
13 -0.016 -0.034
15 +0.018
15 +0.065 +0.030
12.990
13.058
1310
1320
14 -0.016 -0.034
16 +0.018
16+0.065 +0.030
13.990
14.058
1410
1412
1415
1420
1425
15 -0.016 -0.034
17 +0.018
17+0.065 +0.030
14.990
15.058
1510
1512
1515
1520
1525
16 -0.016 -0.034
18 +0.018
18 +0.065 +0.030
15.990
16.058
1610
1612
1615
1620
1625
17 -0.016 -0.034
19 +0.021
19 +0.075 +0.035
16.990
17.061
1710
1712
1720
18 -0.016 -0.034
20 +0.021
20 +0.075 +0.035
17.990
18.061
1810
1812
1815
1820
1825
20 -0.020 -0.041
23 +0.021
23 +0.075 +0.035
19.990
20.071
1.475
1.505
0.6
0.4
2010
2012
2015
2020
2025
2030
22 -0.020 -0.041
25 +0.021
25 +0.075 +0.035
21.990
22.071
2210
2212
2215
2220
2225
2230
24 -0.020 -0.041
27 +0.021
27 +0.075 +0.035
23.990
24.071
2415
2420
2425
2430
25 -0.020 -0.041
28 +0.021
28 +0.075 +0.035
24.990
25.071
2510
2512
2515
2520
2525
2530
2540
2550
28 -0.020 -0.041
32 +0.025
32 +0.085 +0.045
27.990
28.085
1.970
2.005
1.2
0.4
2815
2820
2825
2830
2840
30 -0.020 -0.041
34 +0.025
34 +0.085 +0.045
29.990
30.285
3012
3015
3020
3025
3030
3040
32 -0.025 -0.050
36 +0.025
36 +0.085 +0.045
31.990
32.085
3220
3230
3240
35 -0.025 -0.050
39 +0.025
39 +0.085 +0.045
34.990
35.085
3512
3515
3520
3525
3530
3540
3550
38 -0.025 -0.050
42 +0.025
42 +0.085 +0.045
37.990
38.085
3815
3830
3840
40 -0.025 -0.050
44 +0.025
44 +0.085 +0.045
39.990
40.085
4012
4020
4025
4030
4040
4050
Matching shaft diameter tolerance
Matching seat hole tolerance
(H7)
Bearing outer diameter tolerance
Bearing inner diameter tolerance after pressing into the seat hole
SF-1W Lead-free bearings
