Ferrous gear assembly made to net shape via P/M.(METALS)

Powder metallurgy parts in a gear assembly have been made to net shape for a motor drive in automatic sliding minivan doors by Asco Sintering Company, Commerce, Calif., and Deltran Inc., Amherst, N.Y. The assembly consists of an armature, rotor blank, bearing, and pinion gear. The assembly operates in a motor drive for automatic sliding minivan doors and opening and closing tailgates. Made from a P/M phosphorous iron material, the parts have a density of 7.0 g/c[m.sup.3], an ultimate tensile strength of 310 MPa (45,000 psi), and a yield strength of 220 MPa (32,000 psi). The ...