GGB EP79 engineered plastic cylindrical bearings with low thermal expansion

GGB EP79 Cylindrical bushes

EP™79 Self-Lubricating Engineered Plastic Bearings

CHARACTERISTICS

  • Excellent flow erosion and cavitation resistance
  • Excellent bearing performance in fully lubricated applications
  • Corrosion resistant in humid/saline environments
  • Excellent dimensional stability
  • Very good weight performance ratio
  • Within injection moulding tool feasibility unlimited dimensions and design features
  • Compliant to EVL, WEEE and RoHS specifications

availability

Bearing forms made to order: cylindrical bushings, flanged bearings, thrust washers, sliding plates, half-bearings, customized bearing designs

STRUCTURE AND COMPOSITION

Thermoplastic Compound Material 

PAI + Solid Lubricant + Fillers

MICROSECTION

 

PAI +

Solid Lubricant +

Fillers

 

 

OPERATING PERFORMANCE
Dry Not recommended
Oil lubricated Very Good
Grease lubricated Very Good
Water lubricated Fair
Process fluid lubricated Good after resistance testing
For superior performance
Dry EP73
Water lubricated EP64

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

N/mm2

130

Operating temperature

Min

Max

°C

°C

- 200

260

Coefficient of linear thermal expansion   10-6/K 9
lubricated      
Maximum sliding speed, U   m/s

10.0

Maximum pU factor

 

N/mm2 x m/s

10.0

Coefficient of friction    

0.005 - 0.1

Recommendations      
Surface roughness, Ra

 

µm

0.2 - 0.8

Surface hardness   HV

> 500

STRUCTURE AND COMPOSITION

Thermoplastic Compound Material 

PAI + Solid Lubricant + Fillers

MICROSECTION

 

PAI +

Solid Lubricant +

Fillers

 

 

OPERATING PERFORMANCE
Dry Not recommended
Oil lubricated Very Good
Grease lubricated Very Good
Water lubricated Fair
Process fluid lubricated Good after resistance testing
FOR SUPERIOR PERFORMANCE
Dry EP73
Water lubricated EP64

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

psi

19 000

Operating temperature

Min

Max

°F

°F

- 330

500

Coefficient of linear thermal expansion   10-6/K  5
LUBRICATED      
Maximum sliding speed, U   fpm

2 000

Maximum pU factor

 

psi x fpm

286 000

Coefficient of friction    

0.005 - 0.1

RECOMMENDATIONS      
Surface roughness, Ra   µin 8 - 32
Surface hardness   HV

> 500

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