GGB DP31 Lead-free plain bearing in metal-polymer composite material

GGB DP31 Cylindrical bushes

DP31 Metal-Polymer Hydrodynamic Composite Bearings

CHARACTERISTICS

  • Excellent low friction and wear resistance performance in lubricated applications
  • Excellent flow erosion and cavitation resistance
  • Very good fatigue strength
  • Lead-free material compliant to EVL, WEEE, and RoHS specifications

availability

Bearing forms made to order: cylindrical bushes, flanged bushes, thrust washers, flanged thrust washers, sliding plates, half-bearings, bearings with locating notches, lubricant holes and machined/stamped grooves, customized bearing designs

STRUCTURE AND COMPOSITION

  • Metal-Polymer Composite Material 
  • Steel Back + Porous  Bronze Sinter +
  • PTFE + Fluoropolymer + Fillers

MICROSECTION

Sliding layer PTFE
+ Solid Lubricant
+ Fluoropolymer
+ Fillers

Porous Bronze Sinter

 

Steel Backing

 

OPERATING PERFORMANCE  
Dry Fair
Oil lubricated Very Good
Grease lubricated Fair
Water lubricated Fair
Process fluid lubricated Good
For superior performance
Dry DP4 / DP11
Grease lubricated DP4 / DX
Water lubricated DP4-B

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

N/mm2

N/mm2

250

140

Operating temperature

Min

Max

°C

°C

- 200

280

Coefficient of linear thermal expansion

 

Parallel to the surface 10-6/K 11

Normal to the surface

10-6/K

30

OIL LUBRICATED      
Maximum sliding speed, U   m/s

10.0

Maximum pU factor   N/mm2 x m/s

10.0

Coefficient of friction    

0.01 - 0.05

RecommEndationS      
Shaft surface roughness, Ra

Lubricated

µm

0.05 - 0.4 *

Shaft surface hardness Unhardened acceptable, improved bearing life > 200HB  

* Depending on operating conditions

STRUCTURE AND COMPOSITION

  • Metal-Polymer Composite Material 
  • Steel Back + Porous  Bronze Sinter +
  • PTFE + Fluoropolymer + Fillers

MICROSECTION

Sliding layer PTFE
+ Solid Lubricant
+ Fluoropolymer
+ Fillers

Porous Bronze Sinter

 

Steel Backing

 

OPERATING PERFORMANCE  
Dry Fair
Oil lubricated Very Good
Grease lubricated Fair
Water lubricated Fair
Process fluid lubricated Good
FOR SUPERIOR PERFORMANCE
Dry DP4 / DP11
Grease lubricated DP4 / DX
Water lubricated DP4-B

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

psi

psi

36 000

20 000

Operating temperature

Min

Max

°F

°F

- 328

536

Coefficient of linear thermal expansion

Parallel to the surface

10-6/F

6

Normal to the surface 10-6/F 17
OIL LUBRICATED      
Maximum sliding speed, U   fpm

2 000

Maximum pU factor   psi x fpm

286 000

Coefficient of friction    

0.01 - 0.05

RECOMMENDATIONS      

Shaft surface roughness, Ra

Lubricated

µin

≤ 2 - 16 *

Shaft surface hardness Unhardened acceptable, improved bearing life > 200HB  

* Depending on operating conditions 

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