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The Center cut flange Oilless bearings are machined from continuous cast bronze bar stock.
They are then milled and plugged with solid lubricant graphite based plugs. The plugged graphite bushings are great for applications where maintenance is difficult and where normal grease and oil based lubricants can burn off due to high temperatures.
The cast bronze base material gives these products stronger bearing abilities when compared to other self lubricating bronze bushings.
Center cut flange Oilless bearing is the self-lubricating bush which is based on the metal friction surface of the bush basement where holes are spread reasonably in the proper size and a specific solid lubricant that has a self-lubricating function is inserted, This kind of bush has included the advantages of the metal basement and lubricant materials that have the specific direction for producing chemicals. It has broken in the limit of general bush that depends on an oil film. Oilless bush is especially applied in oil-free high temperature, high load, low speed, contamination resistance, corruption resistance radiation resistance as well as the use under such special work conditions that cannot be lubricated, such as underwater and in vacuum space. The products are widely applied in metallurgy and steel-rolling equipment, mine machinery, shipping machinery, shipping industry. Space voyage, hydraulic turbine, gas turbine, filling equipment, instruments, and weave machinery. It also has a wide range of applications in other industrial and agriculture machinery. And it is being used more and more widely.
The basement of the oilless bush depends on the work conditions of the bush itself.
The commonly used materials are high strength brass tin bronze, etc The inserted solid lubricant materials are mainly two kinds of which based graphite, MoS2 as well as PTFE. According to the bushings’ working conditions, it can ensure that the product can meet various temperatures, loads, movements, and medium through the combination between the different metal basement and solid lubricant and ensure that it can work steadily and credibly
Feature
1. Heavy-duty oil-free bearing with embedded solid lubricant base of the high-strength brass alloy. 2. Available without lubrication 3. It exhibits an excellent wear resistance in difficult locations of oil film configuration 4. It has excellent chemical resistance and corrosion resistance.
Applications
Applied to any industry’s purposes with over 300℃ For even higher. Such as steelworks, elongators, industrial baking ovens, heat treating ovens, heat exchangers, dynamos and supports for nuclear energy reactors, etc.
model
oilless bearing
oilless bearing
oilless bearing
oilless bearing
oilless bearing
China Brands GB1776-87
ZCuZn25 AI6Fe3Mn3
ZCuSn6
Zn6Pb3
ZCuAI10Fe3
ZCuSu10P1
steel+ZCuSn6
Zn6Pb3
HT250
GCr15
ISO1338
GCuZn25 AI6Fe3Mn3
GCuSn6
Zn6Pb3
GCuAI10Fe3
CuSn12
steel+CuSn6Zn6
Pb3Fe3Ni5
–
B1
DIN
G-CuZn25 AI5
GB-CuSn5Zn5Pb5
GB-CuAI10Ni
GB-CuSn10
steel+CuSn6
Zn6Pb3Ni
–
100Cr6
JIS
HBsC4
BC6
AIBC3
BC3
BC6
FC250
SUJ2
ASTM/UNS
C86300
C83600
C95500
C90800
C83600
Class40
52100
BS
HTB2
LG2
AB1
PB4
LG2
–
–
Material Alloy Chemical Composition
chemical element
oil-free bearing
oil-free bearing
oil-free bearing
oil-free bearing
oil-free bearing
Cu ( % )
Rest
Rest
Rest
–
–
Sn ( % )
–
6
–
10
6
–
–
Zn ( % )
25
6
–
–
6
–
–
Ni ( % )
–
–
–
–
–
–
–
AI ( % )
6
–
10
–
–
–
–
Fe ( % )
3
–
3
–
–
Rest
Rest
Mn ( % )
3
–
–
–
–
0.905 – 1.3
0.20 – 0.40
Cr ( % )
–
–
–
–
–
–
1.30 – 1.65
C ( % )
–
–
–
–
–
2.5 – 4
0.95 – 1.05
Si ( % )
–
–
–
–
–
1.0 – 1.3
0.15 -0.35
Pb ( % )
–
3
–
–
3
–
–
Technical parameter
Performance
oil-free bearing
oil-free bearing
oil-free bearing
oil-free bearing
oil-free bearing
density
8
8.9
7.8
8.9
8
hardness HB
≥ 210
≥ 70
≥ 150
≥ 75
≥ 235
tensile strength N/mm²
≥ 750
≥ 250
≥ 500
≥ 270
≥ 800
Yield Strength N/mm²
≥ 450
≥ 90
≥ 260
≥ 150
≥ 450
Elongation %
≥ 12
≥ 13
≥ 10
≥ 5
≥ 8
coefficient of linear expansion
1.9×10-5/℃
1.8×10-5/℃
1.6×10-5/℃
1.8×10-5/℃
1.9×10-5/℃
Operating temperature
-40~+300℃
-40~+400℃
-40~+400℃
-40~+400℃
-40~+300℃
Maximum dynamic load N/mm²
100
60
50
70
120
Maximum line speed（干）m/min
15
10
20
10
15
Maximum PV value N/mm²·m/s
200
60
60
80
200
compression deformation 300N/mm²
＜ 0.01
＜ 0.05
＜ 0.04
＜ 0.05
＜ 0.005
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