本文介绍提高中小型向心球轴承机械打字(字高h~k≤1.0mm)质量和字头寿命的几点体会:①以机刻电腐蚀字头代替手工刻制字头;②机刻电蚀字头的设计标准;③电极在电火花加工字头中的重要性;④轴承套圈的打字及与打字有关的工艺规定。攻关后的字头寿命提高5～10倍,成品字合格率提高到85%以上。 This article describes the improvement of small and medium sized radial ball bearings mechanical typing (word height h ~ k ≤ 1.0mm) quality and prefix life experience: ① machine engraving to replace the hand-carved letterhead hand-made prefix; ② machine engraved electricity Etching head design standards; Electrode EDM word prefix in the importance of; ④ bearing ring typing and typing related to the provisions of the process. After the tackle word prefix life expectancy increased by 5 to 10 times, the finished word pass rate increased to 85% or more.