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| SF-1 Oil free lubrication bearings |
| MATERIAL STRUCTURE |
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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. The copper powder layer of 0.2-0.3mm improves the bonding strength between PTFE/Pb and steel plate, and has good load-bearing capacity and wear resistance. Copper is also a good thermal conductive material that can quickly transfer the heat generated during the operation of bearings
3. Low carbon steel 0.7-2.3 improves the bearing capacity and heat transfer effect
4. Copper/tin electroplating coating, with a copper coating of 0.008mm and a tin coating of 0.005mm, provides excellent corrosion resistance for bearings.
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| main parameter TECHNICAL DATE |
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Static bearing capacity
|
250N/mm2
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friction coefficient
|
0.03~0.20
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Maximum load capacity
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Low speed operation
|
140N/mm2
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Maximum linear speed
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dry friction
|
2m/s
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| |
Rotating and swinging movements
|
60N/mm2
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Fluid lubrication
|
5m/s
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Maximum PV value
(dry friction)
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Intermittent operation
|
3.6N/mm2.m/s
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|
Thermal conductivity coefficient
|
42W(m.K)-1
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| |
Long term operation
|
1.8N/mm2.m/s
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Linear expansion coefficient
|
11x11-6K
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Operating temperature
|
-195℃~＋280℃
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| APPLICATION CHARACTER |
1. Oil free lubrication or low oil lubrication, suitable for situations where refueling is not possible or difficult, and can be used without or with minimal maintenance
2. Good wear resistance, low friction coefficient, and long service life; 3. Can be used within the range of -195 ℃ to+280 ℃
4. Good running performance, low noise, and no pollution; 5. Thin walled structure, lightweight, can reduce mechanical volume
6. During operation, it can form a transfer film to protect the grinding shaft without any biting phenomenon
7. The hardness requirement for the grinding shaft is low, and shafts that have not been quenched and tempered can be used, thereby reducing the processing difficulty of related parts
8. No water or oil absorption, low coefficient of thermal expansion, good heat dissipation, and stable size
9. The back of the steel can be electroplated with various metals, so it can be used in corrosive media without rusting
At present, it has been widely used in various sliding parts of machinery, such as automatic mechanical equipment (telescopic, swinging, sliding, bending, turning, rotating parts) hydraulic cylinder guide sleeve, gear pump, textile machinery, vending machines, plastic molding machines, die-casting machines, rubber machinery, tobacco machines, fitness equipment, office machinery, hydraulic transport vehicles, locomotives, motorcycles, agricultural and forestry machinery, etc. |
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SF-1 Standard tolerance dimension table
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 |
Unit:mm
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Matching shaft diameter tolerance
|
Matching seat hole tolerance
(H7 )
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Bearing outer diameter tolerance
tolerance
|
Bearing inner diameter tolerance after pressing into the seat hole
|
Wall
thick-
ness
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
|
wall thickness
|
f1
|
f2
|
L0-0.40
|
|
20
|
25
|
30
|
40
|
50
|
60
|
70
|
80
|
100
|
115
|
|
45 -0.025
-0.050
|
50 +0.025
|
50 +0.085
+0.045
|
44.990
45.105
|
2.460
2.505
|
1.8
|
0.6
|
4520
|
4525
|
4530
|
4540
|
4550
|
|
|
|
|
|
|
50 -0.025
-0.050
|
55 +0.030
|
55 +0.100
+0.055
|
49.990
50.110
|
5020
|
|
5030
|
5040
|
5050
|
5060
|
|
|
|
|
|
55 -0.030
-0.060
|
60 +0.030
|
60 +0.100
+0.055
|
54.990
55.110
|
|
|
5530
|
5540
|
5550
|
5560
|
|
|
|
|
|
60 -0.030
-0.060
|
65 +0.030
|
65 +0.100
+0.055
|
59.990
60.110
|
|
|
6030
|
6040
|
6050
|
6060
|
6070
|
|
|
|
|
65 -0.030
-0.060
|
70 +0.030
|
70 +0.100
+0.055
|
64.990
65.110
|
|
|
6530
|
6540
|
6550
|
6560
|
6570
|
|
|
|
|
70 -0.030
-0.060
|
75 +0.030
|
75 +0.100
+0.055
|
69.990
70.110
|
|
|
|
7040
|
7050
|
7060
|
7070
|
7080
|
|
|
|
75 -0.030
-0.060
|
80 +0.030
|
80 +0.100
+0.055
|
74.990
75.110
|
|
|
7530
|
7540
|
7550
|
7560
|
7570
|
7580
|
|
|
|
80 -0.030
|
85 +0.035
|
85 +0.120
+0.070
|
80.020
80.155
|
2.440
2.490
|
1.8
|
0.6
|
|
|
|
8040
|
8050
|
8060
|
8070
|
8080
|
80100
|
|
|
85 -0.035
|
90 +0.035
|
90 +0.120
+0.070
|
85.020
85.155
|
|
|
|
8540
|
|
8560
|
|
8580
|
85100
|
|
|
90 -0.035
|
95 +0.035
|
95 +0.120
+0.070
|
90.020
90.155
|
|
|
|
9040
|
9050
|
9060
|
|
9080
|
90100
|
|
|
95 -0.035
|
100 +0.035
|
100 +0.120
+0.070
|
95.020
95.155
|
|
|
|
|
9550
|
9560
|
|
9580
|
95100
|
|
|
100 -0.035
|
105 +0.035
|
105 +0.120
+0.070
|
100.020
100.155
|
|
|
|
|
10050
|
10060
|
|
10080
|
|
100115
|
|
105 -0.035
|
110 +0.035
|
110 +0.120
+0.070
|
105.020
105.155
|
|
|
|
|
|
10560
|
|
10580
|
|
105115
|
|
110 -0.035
|
115 +0.035
|
115 +0.120
+0.070
|
110.020
110.155
|
|
|
|
|
|
11060
|
|
11080
|
|
110115
|
|
120 -0.035
|
125 +0.040
|
125 +0.170
+0.100
|
120.070
120.210
|
2.415
2.465
|
1.8
|
0.6
|
|
|
|
|
|
12060
|
|
12080
|
112100
|
|
|
125 -0.040
|
130 +0.040
|
130 +0.170
+0.100
|
125.070
125.210
|
|
|
|
|
|
12560
|
|
|
125100
|
125115
|
|
130 -0.040
|
135 +0.040
|
135 +0.170
+0.100
|
130.070
130.210
|
|
|
|
|
|
13060
|
|
13080
|
130100
|
|
|
140 -0.040
|
145 +0.040
|
145 +0.170
+0.100
|
140.070
140.210
|
|
|
|
|
|
14060
|
|
14080
|
140100
|
|
|
150 -0.040
|
155 +0.040
|
155 +0.170
+0.100
|
150.070
150.210
|
|
|
|
|
|
15060
|
|
15080
|
150100
|
|
|
160 -0.040
|
165 +0.040
|
165 +0.170
+0.100
|
160.070
160.210
|
|
|
|
|
|
16060
|
|
16080
|
160100
|
160115
|
|
180 -0.040
|
185 +0.046
|
185 +0.210
+0.130
|
180.070
180.216
|
|
|
|
|
|
|
|
|
|
|
18080
|
180100
|
|
|
190 -0.046
|
195 +0.046
|
195 +0.210
+0.130
|
190.070
190.216
|
|
|
|
|
|
|
|
19080
|
190100
|
|
|
200 -0.046
|
205 +0.046
|
205 +0.210
+0.130
|
200.070
200.216
|
|
|
|
|
|
20060
|
|
20080
|
200100
|
|
|
220 -0.046
|
225 +0.046
|
225 +0.210
+0.130
|
220.070
220.216
|
|
|
|
|
|
|
|
22080
|
220100
|
|
|
250 -0.046
|
255 +0.052
|
255 +0.260
+0.170
|
250.070
250.222
|
|
|
|
|
|
|
|
25080
|
250100
|
|
|
260 -0.052
|
265 +0.052
|
265 +0.260
+0.170
|
260.070
260.222
|
|
|
|
|
|
|
|
26080
|
260100
|
|
|
280 -0.052
|
285 +0.052
|
285 +0.260
+0.170
|
280.070
280.222
|
|
|
|
|
|
|
|
28080
|
280100
|
|
|
300 -0.052
|
305 +0.052
|
305 +0.260
+0.170
|
300.070
300.222
|
|
|
|
|
|
|
|
30080
|
300100
|
|
|
|
|
