This part of ISO 1797 specifies shanks of dental rotary instruments made of plastics materials and gives measurement rnethods for the verification of the dimensions. A quality requirement is added in Order to ensure a high quality level. Subclauses 4.6 and 4.7 do not apply to disposable (Single-use) instruments. Shanks made of plastics materials are designed for use at Speeds less than 5 000 r/min. Dieser Teil der ÖNORM enthält Festlegungen für Schäfte von zahnärztlichen rotierenden Instrumenten, die aus Kunststoffmaterialien hergestellt werden, und legt Verfahren zur Überprüfung der Maße fest.