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SF-1 OILLESS BUSHING |
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| Structure |
|
1. PTFE/Pb mixture 0.01~0.03mm, provides an excellent initial transfer film, which effectively coats the mating surface of the bearing assembly, forming an oxide type solid lubricant film.
2. Sintered bronze power 0.20-0.35mm, provides Max. thermal conductivity away from the bearing surface, also serves as a reservoir for the PTFE-lead mixture.
3. Low-carbon steel, gives exceptionally high load carrying capacity, excellent heat dissipation.
4. Copper/Tin plating 0.002mm, provides good corrosion resistance. |
| Tech.data |
Max. Load
|
Static |
250N/m㎡ |
|
Temp. |
-195℃~＋280℃ |
| Dynamic |
140N/m㎡ |
Friction coeffcient |
0.03~0.20 |
Max. Speed
|
Dry |
2m/s |
Thermal conductivity |
42W(m﹡K)﹣1 |
| Lubrication |
>2m/s |
Max. PV(Dry)
|
Short-tem |
3.6N/m㎡.m/s |
Coefficent of thermal expansion
|
11﹡10﹣6﹡K﹣1 |
| Continuous |
1.8N/m㎡.m/s |
| Typical application |
Can meet the demanding criteria for long life and trouble-free performance with or without lubrication.
Automotive: tractors, combines, crop sprayers, earth-movers, graders and other construction, auto machines, Specific uses in power steering cylinders, steering gear thrust washers, disc brakes, calipers and pistons, shock absorbers, governor linkage, windshield wiper motor, tilt gear assemblies...
Business machines: photocopy machines, typewriters, mail sorters, postage meter systems, computer terminal printers and peripheral equipment, automatic printing devices, mail processing machinery...
Hydraulics and valves: pumps including gear, rotary, water, axial piston, and other types, ball, butterfly, poppet steam, and other valves and valve trunnions...
Home appliances: tape recorders, refrigerators, air conditioners, cleaners, polishers, sewing machines, ovens, dishwashers, clothes washing machines...
And materials handling, marine engine, packaging, textile equipment, tools... |
| Availability |
| Cylindrical bushes, flange bushes, thrust washers, strip and non-standard parts as the clients supplied drawing etc. |
| Tolerance of standard metric cylindrical and flange bushes |
Bush inner size
|
Wall thickness
|
Tolerance of wall thickness
|
5≤d＜20 |
1.0 mm |
-0.020~+0.005 |
20≤d＜28 |
1.5 mm |
-0.025~+0.005 |
28≤d＜45 |
2.0 mm |
-0.030~+0.005 |
45≤d＜80 |
2.5 mm |
-0.040~+0.005 |
80≤d＜120 |
2.5 mm |
-0.060~-0.010 |
120≤d |
2.5 mm |
-0.085~-0.035 |
Outside diameter
|
Tolerance of outside diameter
|
D≤10 |
+0.025~+0.055 |
10＜D≤18 |
+0.030~+0.065 |
18＜D≤30 |
+0.035~+0.075 |
30＜D≤50 |
+0.045~+0.085 |
50＜D≤80 |
+0.055~+0.100 |
80＜D≤120 |
+0.070~+0.120 |
120＜D≤180 |
+0.100~+0.170 |
180＜D≤250 |
+0.130~+0.210 |
250＜D≤305 |
+0.170~+0.260 |
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