Resumen:
This standard specifies sizes for drills to be used prior to tapping cylindrical screw threads with standard length of engagement where the drill diameter is approximately equal to the nominal thread diameter minus the thread pitch. This standard does not apply to cold-forming tapping. Drill sizes are given for the following screw threads: - ISO metric screw threads (coarse and fine pitch); - EU metric screw threads (coarse and fine pitch); - ISO inch screw threads (UNC and UNF); - Pipe threads.
Diese Norm legt Durchmesser für Bohrer für zylindrische Gewindekernlöcher mit normaler Einschraublänge fest, wobei der Bohrerdurchmesser ungefähr gleich dem Gewindenenndurchmesser minus Steigung ist. Sie ist nicht für gefurchte Gewinde anzuwenden. Es werden Bohrerdurchmesser für die folgenden Gewinde angegeben: - Metrische ISO-Gewinde (Regel- und Feingewinde); - Metrische EG-Gewinde (Regel- und Feingewinde); - ISO-Zollgewinde (UNC und UNF); - Rohrgewinde.
Keywords:
Bore bits, Close-fit threads, Core diameter, Core drills, Core holes, Cylindrical shape, Diameter, Dimensions, Drills, Hole size, Holes, Inch screw threads, ISO metric threads, ISO miniature screw threads, ISO screw threads, Metric, Metric screw threads, Normal threads, Pipe threads, Ratings, Standard tolerances, Tapped holes, Tapping (threads), Taps (threading), Threads, Tolerances (measurement), Tools, Twist drills, Whitworth pipe threads, Whitworth screw threads