Products

Metal and Bimetal Bearings

GGB-BP25

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

Downloads

CAD Drawings
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Technical Data - Metric
Technical Data - IMPERIAL

STRUCTURE AND COMPOSITION

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

Similar to SINT A 50, Impregnation
Group 1

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.