GGB SP Bimetal cylindrical bearings with plain sliding layer for lubricated applications

GGB SP Cylindrical Bearings

SP Bimetal Plain Bearings to Standard SAE 794

CHARACTERISTICS

  • Bimetal bearing with steel backing and leaded bronze overlay
  • For lubricated applications with plain sliding layer
  • Suitable for oil and grease lubrication

availability

Bearing forms made to order: cylindrical bushes, thrust washers, sliding plates, customized bearing designs

STRUCTURE AND COMPOSITION

Steel Backing and Leaded Bronze Overlay

Steel + CuPb26Sn2

MICROSECTION

Microsection of GGB SP bronze bearings with steel backing

 

Sliding layer

CuPb26Sn2 with
composition approx.:
Cu   72 %
Pb   26 %
Sn   2 %

 

Steel backing

 

OPERATING PERFORMANCE
Dry Poor
Oil lubricated Good
Grease lubricated Good
Water lubricated Poor
Process fluid lubricated Poor

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

N/mm2

N/mm2

250

120

Operating temperature

Min

Max greased

Max oil lubricated

°C

°C

°C

- 40

150

250

 

GREASED/ Oil lubricated      
Maximum sliding speed, U   m/s

2.5

Maximum pU factor

 

N/mm2 x m/s

2.8

Coefficient of friction Greased  

0.05 - 0.12

Coefficient of friction Oiled  

0.04 - 0.12

 

Recommendations      
Surface roughness, Ra

 

µm

≤ 0.4

Surface hardness

Normal

For longer service life

HB

HB

> 200

> 350

 

STRUCTURE AND COMPOSITION

Steel Backing and Leaded Bronze Overlay

Steel + CuPb26Sn2

MICROSECTION

Microsection of GGB SP bronze bearings with steel backing

 

Sliding layer

CuPb26Sn2 with
composition approx.:
Cu   72 %
Pb   26 %
Sn   2 %

 

Steel backing

 

OPERATING PERFORMANCE
Dry Poor
Oil lubricated Good
Grease lubricated Good
Water lubricated Poor
Process fluid lubricated Poor

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

psi

psi

44 000

20 000

Operating temperature

Min

Max greased

Max oil lubricated

°F

°F

°F

- 40

300

480

GREASE / OIL LUBRICATED      
Maximum sliding speed, U   fpm

500

Maximum pU factor

 

psi x fpm

80 000

Coefficient of friction

Greased

Oiled

 

0.05 - 0.12

0.04 - 0.12

RECOMMENDATIONS      
Surface roughness, Ra

 

µin

≤ 32

Surface hardness

Normal

For longer service life

HB

HB

> 200

> 350

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