Fabrication
The concept was brought to fruition using CNC powder compaction. To enable an 82:1 dual reduction planetary gear system, it was essential to be able to deliver tight dimensional control for this complex shaped part. The five-level pinion, that has different tooth gear geometries on both ends, a 15-tooth and 18-tooth separated by a thin guiding flange that is used for orientation during assembly, exceeds ANSI/AGMA 2000-A88 class 7 requirements. Validation testing is performed by the end customer for performance, durability, reliability, and NVH (noise, vibration, and harshness). The FL-4405 prealloyed steel pinion undergoes quench & temper heat treatment prior to oil impregnation. This provides a robust wear resistant part with internal lubrication, with lower torque loss at start up and in cold weather conditions than grease, under normal operating conditions.