Automatic Transmissions

DP31

BEARING APPLICATION REQUIREMENTS

Heavy-duty automatic transmissions are fitted to large diesel engines in many types of construction equipment such as articulating dump trucks, mining trucks and others.

Low friction plain bearings help improve efficiency by reducing power loss, one of the major performance requirements for these transmissions.

GGB low friction BEARING SOLUTION

Specifically designed for high performance in lubricated environments, DP31 low friction cylindrical bearings and thrust washers are widely used in transmission applications. These include planetary gear sets and carriers, main shaft and rear output shaft bearings and reverse idler gears, differential gears, torque converters, sector drives and accessory drives.

The structure of the cylindrical bearings consists of a rigid steel backing, to which is bonded a porous bronze sinter interlayer impregnated and overlaid with a filled PTFE bearing layer. This robust structure enables the bearings to withstand high specific loads, and the PTFE-based sliding layer provides excellent low friction performance.

GGB low friction BEARINGS for transmissions - BENEFITS

Benefits gained from using DP31 cylindrical plain bearings are:

• Tolerance of mixed film lubrication and lubricant starvation with a self-lubricating low friction sliding layer
• Precise tolerances, dimensional stability and high wear resistance for long service life
• One-piece construction for easy assembly without the need for expensive tooling and equipment
• Quiet operation with no moving parts
• Lead-free bearing composition in compliance with RoHS and ELV directives