SLIDING CONTACT MATERIAL

摘要

PURPOSE:To obtain a sliding contact material having low and stable contact resistance as well as improved lubricity and wear resistance and reducing irregularity in the number of revolutions of a commutator by adding specified amounts of Zn and Cd to Ag. CONSTITUTION:A sliding contact material is obtd. by adding 0.5-6wt% Zn and 0.5-3wt% Cd to Ag. The contact material having said composition has high lubricity and superior wear resistance. The contact chip of the commutator of a small-sized motor made of the contact material produces little powder owing to wear and generates no noise during sliding along a brush contact. The contact material has low and stable contact resistance, so irregularity in the number of revolutions of the commutator is considerably reduced.