| SF-2X Marginal Lubricating Bush
|
| Material Structure |
|
|
1. A mixture of modified polyoxymethylene (POM) and lead with a thickness of 0.3-0.5mm has high wear resistance and even a low friction coefficient in the case of instantaneous oil shortage. The oil storage pits with spiral angles arranged regularly on the surface of the bearing must be coated with lubricating grease during assembly.
2. The copper powder layer is 0.2-0.3mm, which has good load-bearing capacity and wear resistance. Its excellent thermal conductivity can timely transfer the heat generated during the operation of the bearing. Composite materials can penetrate into the gaps between copper powder balls, improving the bonding strength.
3. Low carbon steel 0.4~2.2mm, improving the bearing's load-bearing capacity and heat transfer effect.
4. Copper/tin electroplating layer, with a copper coating of 0.008mm and a tin coating of 0.005mm, provides the bearing with excellent corrosion resistance. |
| Main parameters Technical Date |
Maximum load capacity |
Static bearing capacity |
250N/mm2 |
|
Operating temperature |
-40℃~＋130℃ |
| |
Low speed operation |
140N/mm2 |
|
Maximum linear velocity |
grease lubrication |
2m/s |
| |
Rotating and swinging motion |
70N/mm2 |
|
|
Continuously supply oil |
4m/s |
Maximum PV value |
2.8N/mm2.m/s |
|
thermal conductivity |
4W(m.K)-1 |
coefficient of linear expansion |
11x10-6K |
|
coefficient of friction |
0.05~0.20 |
|
| Application Features Application CHARACTER |
Specially suitable for rotating and swinging movements under heavy loads and low speeds, as well as parts that frequently open and close under load but are not easily lubricated by fluid; Under boundary lubrication conditions, it can be used for a long time without refueling or maintenance, and refueling during the process can prolong the service life of the bearing; The plastic layer on its surface can leave a certain margin during the shaft sleeve molding process, and can be self processed after being pressed into the opening to achieve better assembly dimensions.
At present, it is mainly used in metallurgical machinery, mining machinery, water conservancy machinery, automotive chassis, construction machinery, agricultural machinery, steel rolling machinery, etc. |
 |
|
| SF-2X series bearing standard dimensions |
|
Unit: mm |
d |
D |
shaft diameter |
Seat hole H7 |
wall thickness |
H oil hole |
f1
|
f2
|
L0-0.40
|
minimum |
maximum |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
60 |
10 |
12 |
10-0.022 |
12+0.018 |
0.955 |
0.980 |
4 |
0.6 |
0.3 |
1010 |
1015 |
1020 |
|
|
|
|
|
|
|
12 |
14 |
12-0.027 |
14+0.018 |
1210 |
1215 |
1220 |
|
|
|
|
|
|
|
14 |
16 |
14-0.027 |
16+0.018 |
|
1415 |
1420 |
|
|
|
|
|
|
|
15 |
17 |
15-0.027 |
17+0.018 |
|
1515 |
1520 |
1525 |
|
|
|
|
|
|
16 |
18 |
16-0.027 |
18+0.018 |
|
1615 |
1620 |
1625 |
|
|
|
|
|
|
18 |
20 |
18-0.027 |
20+0.021 |
|
1815 |
1820 |
1825 |
|
|
|
|
|
|
20 |
23 |
20-0.033 |
23+0.021 |
1.445 |
1.475 |
0.6 |
0.4 |
|
2015 |
2020 |
2025 |
2030 |
|
|
|
|
|
22 |
25 |
22-0.033 |
25+0.021 |
|
2215 |
|
2225 |
|
|
|
|
|
|
25 |
28 |
25-0.033 |
28+0.021 |
6 |
|
2515 |
2520 |
2525 |
2530 |
|
|
|
|
|
28 |
32 |
28-0.033 |
32+0.025 |
1.935 |
1.970 |
1.2 |
0.4 |
|
|
2820 |
|
2830 |
|
|
|
|
|
30 |
34 |
30-0.033 |
34+0.025 |
|
|
3020 |
3025 |
3030 |
3035 |
3040 |
|
|
|
35 |
39 |
35-0.039 |
39+0.025 |
|
|
3520 |
|
3530 |
3535 |
3540 |
|
|
|
40 |
44 |
40-0.039 |
44+0.025 |
8 |
|
|
4020 |
|
4030 |
4035 |
4040 |
|
4050 |
|
45 |
50 |
45-0.039 |
50+0.025 |
2.415 |
2.460 |
1.8 |
0.6 |
|
|
4520 |
|
4530 |
|
4540 |
4545 |
4550 |
|
50 |
55 |
50-0.046 |
55+0.030 |
|
|
|
|
5030 |
|
5040 |
|
5050 |
5060 |
55 |
60 |
55-0.046 |
60+0.030 |
|
|
|
|
5530 |
|
5540 |
|
5550 |
5560 |
60 |
65 |
60-0.046 |
65+0.030 |
|
|
|
|
6030 |
|
6040 |
|
6050 |
6060 |
Unit: mm |
d |
D |
shaft diameter |
Seat hole H7 |
wall thickness |
H oil hole |
f1
|
f2
|
L0-0.40
|
minimum |
maximum |
40 |
50 |
60 |
80 |
90 |
95 |
100 |
110 |
120 |
| 65 |
70 |
65-0.046 |
70+0.030 |
2.415 |
2.460 |
8 |
1.8 |
0.6 |
6540 |
|
6560 |
|
|
|
|
|
|
| 70 |
75 |
70-0.046 |
75+0.030 |
7040 |
7050 |
|
7080 |
|
|
|
|
|
| 75 |
80 |
75-0.046 |
80+0.030 |
7540 |
|
7560 |
7580 |
|
|
|
|
|
| 80 |
85 |
80-0.046 |
85+0.035 |
2.385 |
2.450 |
9.5 |
1.8 |
1.8 |
8040 |
|
8060 |
8080 |
|
|
|
|
|
| 85 |
90 |
85-0.054 |
90+0.035 |
8540 |
|
8560 |
8580 |
|
|
|
|
|
| 90 |
95 |
90-0.054 |
95+0.035 |
9040 |
|
9060 |
9080 |
9090 |
|
|
|
|
| 100 |
105 |
100-0.054 |
105+0.035 |
|
10050 |
|
10080 |
|
10095 |
|
|
|
| 105 |
110 |
105-0.054 |
110+0.035 |
|
|
10560 |
10580 |
|
10595 |
|
105110 |
|
| 110 |
115 |
110-0.054 |
115+0.035 |
|
|
11060 |
11080 |
|
11095
|
|
110110 |
|
| 120 |
125 |
120-0.054 |
125+0.035 |
1.8 |
0.6 |
|
|
12060 |
12080 |
|
|
|
120110 |
|
| 125 |
130 |
125-0.063 |
130+0.040 |
|
|
12560 |
|
|
|
|
125110
|
|
| 130 |
135 |
130-0.063 |
135+0.040 |
|
13050 |
13060 |
13080 |
|
|
130100 |
|
|
| 140 |
145 |
140-0.063 |
145+0.040 |
|
14050 |
14060 |
14080 |
|
|
140100 |
|
|
| 150 |
155 |
150-0.063 |
155+0.040 |
|
15050 |
15060 |
15080 |
|
|
150100 |
|
|
| 160 |
165 |
160-0.063 |
165+0.040 |
9.5 |
|
16050 |
16060 |
16080 |
|
|
160100 |
|
|
| 170 |
175 |
170-0.063 |
175+0.040 |
|
17050 |
|
17080 |
|
|
170100 |
|
|
| 180 |
185 |
180-0.063 |
185+0.040 |
|
18050 |
18060 |
18080 |
|
|
180100 |
|
|
| 190 |
195 |
190-0.072 |
195+0.046 |
|
19050 |
19060 |
19080 |
|
|
190100 |
|
190120 |
| 200 |
205 |
200-0.072 |
205+0.046 |
|
20050 |
20060 |
20080 |
|
|
200100 |
|
200120 |
| 220 |
225 |
220-0.072 |
225+0.046 |
9.5 |
|
22050 |
22060 |
22080 |
|
|
220100 |
|
220120 |
| 240 |
245 |
240-0.072 |
245+0.046 |
|
24050 |
24060 |
24080 |
|
|
240100 |
|
240120 |
| 250 |
255 |
250-0.081 |
255+0.052 |
|
25050 |
25060 |
25080 |
|
|
250100 |
|
250120 |
| 260 |
265 |
260-0.081 |
265+0.052 |
|
26050 |
26060 |
26080 |
|
|
260100 |
|
260120 |
| 280 |
285 |
280-0.081 |
285+0.052 |
|
28050 |
28060 |
28080 |
|
|
280100 |
|
280120 |
| 300 |
305 |
300-0.081 |
305+0.052 |
|
30050 |
30060 |
30080 |
|
|
300100 |
|
300120 |
|
|
