1. A mixture of modified polytetrafluoroethylene (PTFE) and lead (Pb), 0.01-0.03mm, is a wear-resistant material that can form a transfer film during operation to protect the grinding shaft
2. Copper powder layer, 0.20-0.3mm, improves the bonding strength between PTFE/Pb and copper plate layer, and has good load-bearing capacity and wear resistance. A higher thermal conductivity can quickly transfer the heat generated during operation
3. The copper substrate is 0.7-2.3, which improves the bearing capacity and heat transfer, and has better corrosion resistance.
main parameter TECHNICAL DATE
Static bearing capacity
250N/mm2
friction coefficient
0.03~0.20
Maximum load capacity
Low speed operation
140N/mm2
Maximum linear speed
dry friction
2m/s
Rotating and swinging movements
60N/mm2
Fluid lubrication
5m/s
Maximum PV value
(Dry friction)
Intermittent operation
3.6N/mm2.m/s
Thermal conductivity coefficient
70W(m.K)-1
Long term operation
1.8N/mm2.m/s
Linear expansion coefficient
17x11-6K
Operating temperature
-195℃~＋300℃
APPLICATION CHARACTER
In addition to the same advantages as SF-1, it also has the following characteristics:
Due to its self-lubricating properties, copper can be used in areas that require long-term operation and cannot be stopped for maintenance, and has better corrosion resistance than SF-1. Widely used in weak acid and strong alkali environments, port machinery, shipbuilding machinery, metallurgical and steel industries, continuous casting machine billet raceways, high-temperature furnace steel rings, cement grouting pumps, and screw conveyors. It can be combined with steel sleeves on the outside, or made into flipped edges, with both the end face and inner hole friction for use.
SF-1B 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
