GGB-BP25 sintered bronze cylindrical bearings for maintenance-free operations

GGB-BP25 Cylindrical bushes

GGB-BP25 METAFRAM Oil Impregnated Sintered Bronze Bearings

CHARACTERISTICS

  • Similar to SINT A 50, impregnation group 1
  • Maintenance-free bearing for general engineering applications
  • Optimum performance under relatively light loads and high speeds
  • Produced by powder metallurgy process and therefore suitable for complex shapes

availability

Bearing forms available in standard dimensions
  • Plain cylindrical bushes
  • Plain flanged bushes
Bearing forms made to order: cylindrical bushes and flanged bushes with non-standard dimensions, spherical bearings, tubes and rod blanks, customized bearing designs

STRUCTURE AND COMPOSITION

GGB-BP25 METAFRAM Oil Impregnated Sintered Bronze Bearings and Bronze Sleeve Bushings

Similar to SINT A 50, Impregnation
Group 1

MICROSECTION

GGB-BP25 sintered bronze bearings and bushings microsection

 

Sn         8 - 10,5 %
Other    < 2 %
Cu         Rest   
Impregnation group 1
(up to 80°C)

 

OPERATING PERFORMANCE
Dry Good (PTFE/MoS2)
Oil lubricated Good
Grease lubricated Fair
Water lubricated Not recommended
Process fluid lubricated Not recommended

Nothing changes except the name of the GGB bearing material: to better fight against counterfeiting, GGB has changed BP25 (also known as BP 25 or sinterbronze) into GGB-BP25.

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load, p

Static

Dynamic

N/mm2

N/mm2

20

10

Operating temperature

Min

Max

°C

°C

-180 / 0 *

90 / 300 *

Minimum density   g/cm3 6.2
Minimum apparent porosity   % 23

 

OIL IMPREGNATED      
Maximum sliding speed, U   m/s

0.1 - 6.0 *

Maximum pU factor

 

N/mm2 x m/s

0.1 - 1.8 *

Coefficient of friction f, boundary    

0.05 - 0.25 *

Recommendations      
Surface roughness, Ra

 

µm

≤ 0.3 - ≤ 0.6 *

Surface hardness   HB

> 240 - > 355 *

* Bearing properties depending on oil or solid lubricants. This information is available by downloading the GGB-BP25 datasheet or brochure.

STRUCTURE AND COMPOSITION

GGB-BP25 METAFRAM Oil Impregnated Sintered Bronze Bearings and Bronze Sleeve Bushings

Similar to SINT A 50, Impregnation
Group 1

MICROSECTION

GGB-BP25 sintered bronze bearings and bushings microsection

 

Sn         8 - 10,5 %
Other    < 2 %
Cu         Rest   
Impregnation group 1
(up to 80°C)

 

OPERATING PERFORMANCE
Dry Good (PTFE/MoS2)
Oil lubricated Good
Grease lubricated Fair
Water lubricated Not recommended
Process fluid lubricated Not recommended

Nothing changes except the name of the GGB bearing material: to better fight against counterfeiting, GGB has changed BP25 (also known as BP 25 or sinterbronze) into GGB-BP25.

BEARING PROPERTIES

GENERAL   Unit Value
Maximum load,

Static

Dynamic

psi

psi

2 900

1 400

Operating temperature

Min

Max

°F

°F

- 290 / 30 *

190 / 570 *

Minimum density

 

lb/in3

0.22

Minimum apparent porosity   % 23
OIL IMPREGNATED      
Maximum sliding speed U   fpm

20 - 1 100 *

Maximum pU factor

 

psi x fpm

2 800 - 51 400 *

Coefficient of friction f, boundary    

0.05 - 0.25 *

RECOMMENDATIONS      
Surface roughness, Ra

 

µin

≤ 12 – ≤ 24 * 

Surface hardness   HB

 > 240 – > 355 *

* Bearing properties depending on oil and solid lubricants. This information is available by downloading the GGB-BP25 datasheet or brochure.

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