GGB EP73 Cylindrical bushes

EP™73 Self-Lubricating Engineered Plastic Bearings

CHARACTERISTICS

  • Good bearing performance in dry working conditions
  • Good bearing performance in lubricated or marginally lubricated applications
  • Corrosion resistant in humid/saline environments
  • Very good 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 Good
Oil lubricated Good
Grease lubricated Good
Water lubricated Fair
Process fluid lubricated Good after resistance testing
For superior performance
Water lubricated EP64

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

N/mm2

105

Operating temperature

Min

Max

°C

°C

- 200

260

Coefficient of linear thermal expansion   10-6/K

25

Dry      
Maximum sliding speed, U   m/s

2.5

Maximum pU factor

for AH/AC  =  5

for AH/AC  = 10

for AH/AC  = 20

N/mm2 x m/s

N/mm2 x m/s

N/mm2 x m/s

0.10

0.39

1.57

Coefficient of friction    

0.19 - 0.31

LUBRICATED      
Maximum sliding speed, U   m/s

5.0

Recommendations      
Surface roughness, Ra

 

µm

0.2 - 0.8

Surface hardness   HV

> 200

STRUCTURE AND COMPOSITION

Thermoplastic Compound Material 

PAI + Solid Lubricant + Fillers

MICROSECTION

 

 

 

PAI +

Solid Lubricant  +

Fillers

OPERATING PERFORMANCE
Dry Good
Oil lubricated Good
Grease lubricated Good
Water lubricated Fair
Process fluid lubricated Good after resistance testing
FOR SUPERIOR PERFORMANCE
Water lubricated EP64

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

psi

15 000

Operating temperature

Min

Max

°F

°F

- 330

500

Coefficient of linear thermal expansion   10-6/F

14

 

DRY      
Maximum sliding speed, U   fpm

500

Maximum pU factor

for AH/AC  =  5

for AH/AC  = 10

for AH/AC  = 20

psi x fpm

psi x fpm

psi x fpm

2 800

11 100

44 900

Coefficient of friction, f  

0.19 - 0.31

LUBRICATED      
Maximum sliding speed, U   fpm

1 000

RECOMMENDATIONS      
Surface roughness, Ra

 

μin

8 - 32

Surface hardness   HV

> 200

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