GMW GMW16578 PDF

Purpose.

This standard defines the acceptable levels of surface porosity and internal voids in as-cast and fully machined aluminum rotor castings used in vehicles containing electric machines.

This document describes the allowable porosity limits in the cast aluminum regions of high pressure die cast rotors. It also serves as an acceptance standard for internal and surface anomalies and discontinuities.

This standard does not preclude the requirements of any other further refined inspection specification (example: control plan) or engineering drawing requirement as long as the minimum requirements of this standard are met or exceptions approved by General Motors.