GGB EP44 Cylindrical bushes

EP™44 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 price performance ratio for high temperature applications
  • 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 bushes, thrust washers, sliding plates, half-bearings, special shapes obtained by stamping, bearings with locating notches, lubricant holes and machined grooves, customized bearing designs

STRUCTURE AND COMPOSITION

Thermoplastic Compound Material 

PPS + Solid Lubricant + Fillers

MICROSECTION

 

 

PPS +

Solid Lubricant  +

Fillers

 

OPERATING PERFORMANCE
Dry Good
Oil lubricated Very Good
Grease lubricated Very Good
Water lubricated Very Good
Process fluid lubricated Good after resistance testing

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

N/mm2

95

Operating temperature

Min

Max

°C

°C

- 40

240

Coefficient of linear thermal expansion   10-6/K  27
DRY      
Maximum sliding speed, U   m/s

1.0

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

0.11

0.42

1.69

Coefficient of friction    

0.16 - 0.26

RECOMMENDATIONS      
Surface roughness, Ra

 

µm

0.2 - 0.8

Surface hardness   HV

> 450

STRUCTURE AND COMPOSITION

Thermoplastic Compound Material 

PPS + Solid Lubricant + Fillers

MICROSECTION

 

 

PPS +

Solid Lubricant  +

Fillers

 

OPERATING PERFORMANCE
Dry Good
Oil lubricated Very Good
Grease lubricated Very Good
Water lubricated Very Good
Process fluid lubricated Good after resistance testing

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

psi

14 000

Operating temperature

Min

Max

°F

°F

- 40

460

Coefficient of linear thermal expansion   10-6/F  15
DRY      
Maximum sliding speed, U   fpm

200

Maximum pU factor

for AH/AC  =  5

for AH/AC  = 10

for AH/AC  = 20

psi x fpm

psi x fpm

psi x fpm

3 100

12 000

48 300

Coefficient of friction, f  

0.16 - 0.26

RECOMMENDATIONS      
Surface roughness, Ra

 

μin

8 - 32

Surface hardness   HV

> 450

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