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OilLess/Graphite Embedded Bush-Bearings, Liners & Wear Plates
[Equivalents: Oiles America (#500SP), Federal Mogul Devaglide, Fibro
(Germany) and their other Grades]
Mechanical / Physical Properties:
* The values mentioned are for base
material High Tensile Brass -3 (UNS 86300) / #500SP OILES / Federal Mogul
Devaglide.
The base material may be changed as
per specifications or application requirements to
·
Nickel Al. Bronze
[BS1400 AB-2C].
·
Aluminum Bronze
[BS1400 AB-1C].
·
Leaded Red Brass (UNS
83600).
·
Leaded Tin Bronze (UNS
91700).
·
Tin Bronze (UNS
92700).
·
Phos. Bronze [BS1400
PB-2C), etc
** The values mentioned are for base
En-31 material. The base material shall with the changed as per specifications
or application requirements. Various base materials can be En-24, Stainless
Steel, 16MnCr, etc
*** Zinc – Aluminum – Copper based
Alloy known as ZA-27.
**** The values mentioned are for base
material Cast Iron. The base material shall with the changed as per
specifications or application requirements. Various base materials can be S.G.
Iron, etc
Material & Application:
|
Test Item |
OilLess
LB#500
(Graphite
Embedded Bronze)
|
OilLess
LB#2000
(Graphite
Embedded Low carbon Steel) |
OilLess
LB#1000
(Graphite
Embedded ZA-27 Bronze) |
OilLess
LB#300
(Graphite
Embedded High Carbon Steel) |
|
Base Material |
Non-ferrous,
Copper Base Alloy
(e.g. AB-2C, HTB-3, PB-2C, etc)
|
Low Carbon
Steel Base Alloy.
(e.g. En-31,
En-24, Stainless Steel, etc)
|
Non-ferrous,
Zinc-Aluminum Alloy
(e.g. ZA-27 Bronze)
|
High Carbon
Steel Base Alloy.
(e.g. Cast
Iron, S. G. Iron etc)
|
|
Application / Service temperatures |
- 40 oC
- +250 oC |
- 40 oC
- +400 oC |
- 40 oC
- +70 oC |
- 40 oC
- +400 oC |
|
Embedability |
Very Good |
Very Good |
Very Good |
Very Good |
|
Working Conditions |
Can be used
in Sea-water applications. |
Most
suitable for severe mining operations. |
Economical
bearing solution for low loads |
Economical
bearing solution for low loads |
|
Lubricant |
Graphite as
Non-Liquid Lubricant, Share 20-25%. |
Graphite as
Non-Liquid Lubricant, Share 20-25%. |
Graphite as
Non-Liquid Lubricant, Share 20-25%. |
Graphite as
Non-Liquid Lubricant, Share 20-25%. |
Material Data:
|
Test Item |
OilLess
LB#500 *
(Graphite
Embedded Bronze)
|
OilLess
LB#2000 **
(Graphite
Embedded Low carbon Steel) |
OilLess
LB#1000 ***
(Graphite
Embedded ZA-27 Bronze) |
OilLess
LB#300 ****
(Graphite
Embedded High Carbon Steel) |
|
Chemical Composition. |
Cu=60-68%,
Al=3.0-7.5%, Fe=2.0-4.0%, Mn=2.5-5.0%, Ni=0.5-1.5%, Bal.= Zn |
C=0.98-1.1%,
Cr=1.45%, Mn=0.35%, P=0.025 Max., S=0.025 Max, Si=0.23%, Bal= Fe |
Al=26-29%,
Cu=4-6%, Si=0.15-0.20%, Sn=0.11-0.16, Pb=0.13-18%, Impurities=1%, Bal.= Zn |
C=3.25-3.5%,
Cr=0.05-0.45%, Mn=0.5-0.9%, P=0.12 Max., S=0.15 Max., Si=1.8-2.3, Bal.= Fe |
|
Specific gravity |
8.2 g/cm3 |
8.8 g/cm3 |
4.9 g/cm3 |
8.5 g/cm3 |
|
Tensile Strength |
750- 800
N/mm2 [MPa]
/76 - 82 Kgf/mm2
|
1400-1490
N/mm2 [MPa]
/ 142 – 152
Kgf/mm2
|
420- 490
N/mm2 [MPa]
/ 47 - 50
Kgf/mm2
|
140-160 N/mm2
[MPa]
/ 13.5 –
16.5 Kgf/mm2
|
|
Elongation |
10 - 14% |
8 - 10% |
2 - 8% |
5 - 8% |
|
Compressive Proof Stress |
390 N/mm2
[MPa]
/40 Kgf/mm2
|
- |
- |
440 N/mm2
[MPa]
/45 Kgf/mm2 |
|
Hardness |
180 – 240
BHN |
40 - 65 HRC |
90 – 110 BHN |
150 - 170
BHN |
|
Modulus of longitudinal elasticity |
110 kN/mm2 [GPa]
/11,224 Kgf/mm2
|
205 kN/mm2 [GPa]
/20,900 Kgf/mm2 |
98000 N/mm2
[MPa]
/10,000 Kgf/mm2 |
78000 N/mm2
[MPa]
/7,960 Kgf/mm2 |
|
Co-efficient of Friction |
0.04 - 0.1 |
0.04 - 0.1 |
0.04 - 0.1 |
0.04 - 0.1 |
|
Thermal Conductivity |
0.009 W/m
oC
{ 0.21}
{cal/sec oC cm}
|
45-48 W/m-K |
125.5 W/m/ oC at
70-140 oC |
0.005 W/m
oC
{ 0.12}
{cal/sec oC cm} |
|
Co-efficient of Thermal expansion |
2.2 x 10-5/
oC |
11.9 µm/m-°C |
26 mm/mm/°C at 20-100 °C
(x10-6) |
1.2 x 10-5/
oC |
|
Co-efficient of shrinkage
|
1.8 - 2.3% |
1.8 - 2.3% |
1.26% |
- |
|
Shear strength |
560 N/mm2 |
80 GPa |
290-305 MPa |
- |
|
Yield limit Rp 0.2 N/mm2 |
450 |
- |
- |
- |
|
Stroking velocity |
15 m/min |
- |
- |
- |
|
Alt. Flexural strength |
±150 N/mm2 |
- |
±150 N/mm2 |
- |
Surface pressure, temperature, speed and
lubrication: OilLess LB#500* (Graphite Embedded Copper
Alloy)
|
Surface Pressure
Max. (N/cm2 )
|
Temp.
(oC)
|
Speed
(m/min)
|
PV value
N/cm2 x m/min
|
Lubrication |
|
3000 |
300 |
30 |
10,000 |
Initial |
|
5000 |
80 |
15 |
10,000 |
Initial |
|
3000 |
150 |
60 |
20,000 |
Pressure Lubrication |
Service Range: OilLess LB#300** (Graphite Embedded High
Carbon Steel Alloy)
|
Surface Pressure
Max. (N/cm2 )
|
Temp.
(oC)
|
Speed
(m/min)
|
PV value
N/cm2 x m/min
|
Lubrication |
|
500(73.5) |
- 40 oC - 400
oC |
9 |
3,000 |
Oil free Lubrication |
|
800 |
- 40 oC - 400
oC |
15 |
4,900 |
Periodic Lubrication |
* Values above
are nominal values, not standard values. Values in ( ) are of static allowable
pressure.
* Values shall
be higher for base material such low carbon steel and high chrome steels e.g.
En-31, stainless steel.
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