GGB HPF fiber reinforced composite plain bearings for hydropower applications

GGB HPF Cylindrical bushes

HPF® Fiber Reinforced Composite Bearings with PTFE Tape Liner

CHARACTERISTICS

  • Proprietary filled PTFE tape machinable liner
  • Designed for hydropower applications
  • Machinable bearing surface
  • High load capacity
  • Excellent shock and edge loading capacity
  • Low friction, superior wear rate and bearing life
  • Excellent corrosion resistance
  • Dimensionally stable - very low water absorption, low swelling
  • Environmentally friendly

availability

Bearing forms available in standard dimensions
  • Plain cylindrical bushes
  • Sliding plates
Bearing forms made to order: cylindrical bushes with non-standard dimensions, customized bearing designs

STRUCTURE AND COMPOSITION

Composite Material 

Proprietary filled PTFE tape liner with
0.38 mm standard thickness (0.76 mm available on request for machining) + continuous wound fiberglass encapsulated in a high temperature epoxy resin

MICROSECTION

Microsection of GGB HPF Fiber Reinforced Composite Bearings with PTFE Tape Liner

 

Sliding layer

 

 

Backing

 

OPERATING PERFORMANCE
Dry Very Good
Oil lubricated Very Good
Grease lubricated Poor
Water lubricated Very Good
Process fluid lubricated Good
For superior performance
Grease lubricated

DX / DX10

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

N/mm2

N/mm2

140

140

Operating temperature

Min

Max

°C

°C

- 195

140

Dry      
Maximum sliding speed, U   m/s

2.5

Maximum pU factor

 

N/mm2 x m/s

1.23

Coefficient of friction    

0.02 - 0.10 *

Grease LUBRICATED      
Coefficient of friction  

 

0.02 - 0.08 *

Recommendations      
Shaft surface roughness, Ra

 

µm

0.2 - 0.8

Shaft surface hardness

Normal

For longer service life

HB

HB

> 180

> 480

* Depending on operating conditions 

STRUCTURE AND COMPOSITION

Composite Material 

Proprietary filled PTFE tape liner with
0.38 mm standard thickness (0.76 mm available on request for machining) + continuous wound fiberglass encapsulated in a high temperature epoxy resin

MICROSECTION

Microsection of GGB HPF Fiber Reinforced Composite Bearings with PTFE Tape Liner

 

 

Sliding layer

 

 

Backing

 

OPERATING PERFORMANCE
Dry Very Good
Oil lubricated Very Good
Grease lubricated Poor
Water lubricated Very Good
Process fluid lubricated Good
FOR SUPERIOR PERFORMANCE
Grease lubricated

DX / DX10

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

psi

psi

20 000

20 000

Operating temperature

Min

Max

°F

°F

- 320

285

DRY      
Maximum sliding speed, U   fpm

500

Maximum pU factor

 

psi x fpm

35 000

Coefficient of friction    

0.02 - 0.10 *

GREASE LUBRICATED      
Coefficient of friction  

 

0.02 - 0.08 *

RECOMMENDATIONS      
Shaft surface roughness, Ra

 

µin

8 - 32

Shaft surface hardness

Normal

For longer service life

HB

HB

> 180

> 480

* Depending on operating conditions 

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