SF-20 Prelubricated
bearings
■
Structure
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.
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
|
+0.018
0
|
12
|
+0.065
+0.030
|
1.0
0
-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
|
+0.021
0
|
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
|
+0.025
0
|
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
|
|
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
|
+0.030
0
|
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
|
+0.035
0
|
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
|
+0.040
0
|
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
|
+0.046
0
|
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
|
+0.052
0
|
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
|
|