DP4 & DP4-B Dry Bush Bearing

Metal-Polymer Self-lubricating Lead Free Bearing Solutions

DP4 = steel backing

DP4-B = bronze backing

The DP4 and DP4B materials offer the following characteristics:

• Good frictional properties with negligible stick-slip

• High static and dynamic load capacity

• Suitable for rotating, oscillating, reciprocating and sliding movements

• Compact size and low weight

• Pre-finished that requires no machining after assembly

• Possibility to burnish for reduced operating clearance

• No water absorption and therefore dimensionally stable

• Suitable for a wide operating temperature range from -200 to +280 °C

• DP4B with bronze backing for increased corrosion resistance

• Lead free in compliance with European RoHS 2002/95/EC, 2002/96/EC and EVL 2000/53/EC directives

In particular, depending on the dry running conditions, DP4 and DP4B materials present the following performance advantages:

• Good friction and wear performance under light duty conditions

• Particularly suitable for intermittent oscillating and reciprocating movements

• Maintenance free as no external lubrication required

• Seizure resistant.

Lubricated conditions

• Good wear and friction performance over a wide range of load, speed and temperature conditions

• High wear resistance in boundary operating conditions

• High resistance of bearing surface under fluid cavitation and flow erosion conditions

• Suitable for operation in diverse fluids (oil, fuel, solvents, refrigerants, water).

DP4 is a composite bearing material. It consists of a steel DP4

/ bronze DP4B backing to which is bonded a porous sintered bronze inter-layer which is overlaid and impregnated with Polytetrafluoroethylene (PTFE) containing a mixture of inorganic fillers and special polymer fibres.

* Depending on operating conditions

Applications

Industrial