1. Modified polytetrafluoroethylene (PTFE) lead (Pb) and other filling mixtures 0.01~0.03mm, a wear-resistant material, transfer film can be formed during operation to protect the grinding shaft.
2. The copper powder layer of 0.2~0.3mm improves the bonding strength between PTFE/Pb and steel plate, and has good bearing capacity and wear resistance. At the same time, copper is a good heat conducting material, which can quickly transfer the heat generated during the operation of the bearing.
3. Low carbon steel 0.7-2.3mm to improve the bearing capacity and heat transfer effect of the bearing.
4. Copper/tin plating layer, copper plating layer 0.008mm, tin plating layer 0.005mm, so that the bearing has a good corrosion resistance function.
main parameter TECHNICAL DATE
static load
250N/mm2
friction coefficient
0.01~0.05
Maximum load
low speed operation
140N/mm2
maximum linear velocity
dry friction
2m/s
rotation and swing motion
60N/mm2
fluid lubrication
>10m/s
Maximum PV value
(Dry Friction)
intermittent operation
3.6N/mm2.m/s
thermal conductivity
40W(m.K)-1
long-term operation
1.8N/mm2.m/s
linear expansion coefficient
12x 10-6K
operating temperature
-195 ℃ ~ +280 ℃
Application Characteristics
1. The friction coefficient is small and stable under the condition of oil lubrication.
2. Good wear resistance and impact resistance.
3. PV value can reach 120N/mm2 m/s under fluid lubrication condition
4. The product has been widely used in various gear oil pumps, plunger pumps, vane pumps and other occasions, especially for medium and high pressure gear pumps under fluid lubrication or boundary lubrication conditions.
IUT Standard Tolerance Size 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
80.015
80.055 0.025
5.990
6.055
0.980
1.005
0.6
0.3
0606
0608
0610
8-0.013 -0.028
100.015
100.055 0.025
7.990
8.055
0806
0808
0810
08012
08015
10-0.016 -0.034
120.018
120.065 0.030
9.990
10.058
1006
1008
1010
1012
1015
1020
12-0.016 -0.034
140.018
140.065 0.030
11.990
12.058
1206
1208
1210
1212
1215
1220
1225
13-0.016 -0.034
150.018
150.065 0.030
12.990
13.058
1310
1320
14-0.016 -0.034
160.018
160.065 0.030
13.990
14.058
1410
1412
1415
1420
1425
15-0.016 -0.034
170.018
170.065 0.030
14.990
15.058
1510
1512
1515
1520
1525
16-0.016 -0.034
180.018
180.065 0.030
15.990
16.058
1610
1612
1615
1620
1625
17-0.016 -0.034
190.021
190.075 0.035
16.990
17.061
1710
1712
1720
18-0.016 -0.034
200.021
200.075 0.035
17.990
18.061
1810
1812
1815
1820
1825
20-0.020 -0.041
230.021
230.075 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
250.021
250.075 0.035
21.990
22.071
2210
2212
2215
2220
2225
2230
24-0.020 -0.041
270.021
270.075 0.035
23.990
24.071
2415
2420
2425
2430
25-0.020 -0.041
280.021
280.075 0.035
24.990
25.071
2510
2512
2515
2520
2525
2530
2540
2550
28-0.020 -0.041
320.025
320.085 0.045
27.990
28.085
1.970
2.005
1.2
0.4
2815
2820
2825
2830
2840
30-0.020 -0.041
340.025
340.085 0.045
29.990
30.285
3012
3015
3020
3025
3030
3040
32-0.025 -0.050
360.025
360.085 0.045
31.990
32.085
3220
3230
3240
35-0.025 -0.050
390.025
390.085 0.045
34.990
35.085
3512
3515
3520
3525
3530
3540
3550
38-0.025 -0.050
420.025
420.085 0.045
37.990
38.085
3815
3830
3840
40-0.025 -0.050
440.025
440.085 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
