APPLICATIONS
Automotive: Braking systems, clutches, gearbox and transmissions,
hinges: door, bonnet, boot, cabriolet roof tops, pedals; pumps: axial
piston, radial piston, gear and vane; seat mechanisms, steering
systems, struts and shock absorbers, wiper systems, etc.
Industrial: Aerospace, agricultural equipment, construction
equipment, food and beverage, material handling equipment,
formingmachines: metal, plastic and rubber; office equipment,
medical and scientific equipment, packaging equipment,
pneumatic and hydraulic cylinders, pumps and motors, railroad
and tramways, textile machinery, valves, etc.
AVAILABILITY
Bearing forms available in standard dimensions:
Bearing forms made-to-order: Standard forms in special
dimensions, half-bearings, special shapes obtained by stamping or
deep drawing, bearings with locating notches, lubricant holes and
machined/stamped grooves, customized bearing designs
— Cylindrical bushes
— Sliding plates
— Flanged bushes
— Thrust washers
— Flanged washers
®
DP4 Bearing Material
CHARACTERISTICS
METAL-POLYMER ANTI-FRICTION
PLAIN BEARINGS
_
DP4 anti-friction bushings offer good wear and low-friction
performance over a wide range of loads, speeds and
temperatures in dry running conditions
_
Very good performance in lubricated applications
_
Good performance in greased applications
_
Suitable for linear, oscillating and rotating movements
_
Lead-free material compliant to ELV, WEEE, and RoHS
specifications
_
Approved to standard DIN EN 1797: 2002-02 and ISO 21010:
2004-04 (Cryogenic Vessels – Gas/Material Compatibility) for
piping, valves, fittings and other components in both gaseous
and liquid oxygen for up to maximum temperature of 60°C
and oxygen pressure of 25 bars. Contact GGB for further
details.
RoHS
compliant
TRIBOLOGICAL BEARINGS - Metal-Polymer Bearings
Static
Dynamic
Min
Max
Parallel to the surface
Normal to the surface
Dry
Lubricated
Unhardened acceptable,
improved bearing life
MICROSECTION
Steel Backing
Porous Bronze
Sinter
Sliding layer
PTFE + Fillers
BEARING PROPERTIES
GENERAL
Maximum load, p
Operating temperature
Coefficient of linear
thermal expansion
DRY
Maximum sliding speed, U
Maximum pU factor
Coefficient of friction, f
OIL LUBRICATED
Maximum sliding speed, U
Maximum pU factor
Coefficient of friction, f
RECOMMENDATIONS
Shaft surface roughness, Ra
Shaft surface hardness
* Depending on operating conditions
UNITS
2
N/mm
2
N/mm
m/s
2
N/mm x m/s
m/s
°C
°C
2
N/mm x m/s
μm
μm
-6
10 /K
-6
10 /K
VALUE
250
140
-200
280
2,5
1,0
0,04 - 0,25*
5,0
10,0
0,02 - 0,08
0,3 - 0,5
≤ 0,05 - 0,4*
> 200
11
30
OPERATING PERFORMANCE
Oil lubricated
Very good
Grease lubricated
Good
Water lubricated
Fair
Process fluid lubricated
Good
Dry
Good
FOR SUPERIOR PEFORMANCE
DP4-B
Water lubricated
HB
METAL-POLYMER BEARINGS
14