GGB DU-B dry plain bearings with bronze backing and metal polymer composite materials

GGB DU-B Cylindrical bushes

DU-B Metal-Polymer Bronze Backed PTFE Plain Bearing

CHARACTERISTICS

  • Very good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions
  • Suitable for lubricated applications
  • Suitable for linear, oscillating and rotating movements
  • Bronze back offers improved corrosion resistance in humid/saline environments
  • Approved to standard EN 1337-2 for structural bearings for civil engineering

availability

Bearing forms available in standard dimensions
  • Cylindrical bushes
  • Flanged bushes
  • Sliding plates
Bearing forms made to order: standard forms in special dimensions, thrust washers, flanged thrust washers, half-bearings, special shapes obtained by stamping or deep drawing, customized bearing designs

STRUCTURE AND COMPOSITION

  • Metal-Polymer Composite Material
  • Bronze Back + Porous Bronze Sinter +
  • PTFE + Lead

MICROSECTION

Microsection of GGB DU-B composite bearings with bronze backing

Sliding layer PTFE
+ Lead

 

Porous Bronze Sinter

 

Bronze Backing

 

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

DU-B bearing material is known by various names such as DU B or DU - B. Buying a DU-B bearing from GGB or its authorized distributors guarantees that you do not receive a counterfeit product. 

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

N/mm2

N/mm2

140

140

Operating temperature

Min

Max

°C

°C

- 200

280

Coefficient of linear thermal expansion

Parallel to the surface

Normal to the surface

10-6/K

 

10-6/K

18

 

36

Dry      
Maximum sliding speed, U   m/s

2.5

Maximum pU factor   N/mm2 x m/s 1.8
Coefficient of friction    

0.02 - 0.25 *

OIL LUBRICATED      
Maximum sliding speed, U   m/s

5.0

Maximum pU factor   N/mm2 x m/s

5.0

Coefficient of friction    

0.02 - 0.12

RecommEndationS      
Shaft surface roughness, Ra

Dry

Lubricated

µm

µm

0.3 - 0.5

0.05 - 0.4 *

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

* Depending on operating conditions

STRUCTURE AND COMPOSITION

  • Metal-Polymer Composite Material
  • Bronze Back + Porous Bronze Sinter +
  • PTFE + Lead

MICROSECTION

Microsection of GGB DU-B composite bearings with bronze backing

Sliding layer PTFE
+ Lead

 

Porous Bronze Sinter

 

Bronze Backing

 

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

DU-B bearing material is known by various names such as DU B or DU - B. Buying a DU-B bearing from GGB or its authorized distributors guarantees that you do not receive a counterfeit product.  

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

psi

psi

20 000

20 000

Operating temperature

Min

Max

°F

°F

- 328

536

Coefficient of linear thermal expansion

Parallel to the surface

10-6/F

10

Normal to the surface 10-6/F 20
DRY      
Maximum sliding speed, U   fpm

500

Maximum pU factor  

psi x fpm

50 000

Coefficient of friction    

0.02 - 0.25 *

OIL LUBRICATED      
Maximum sliding speed, U   fpm

1 000

Maximum pU factor   psi x fpm

143 000

Coefficient of friction    

0.02 - 0.12

RECOMMENDATIONS      

Shaft surface roughness, Ra

Dry

Lubricated

µin

µin

12 - 20

≤ 2 - 16 *

Shaft surface hardness

Unhardened acceptable, improved bearing life > 200HB

 

* Depending on operating conditions

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