TECHNICAL INFORMATION

1.Terminology of TapsTechnical-1
2.FlutesTechnical-2
3.Edge angle and Cutting allowance of tapsTechnical-3
4.Recommended Tapping SpeedsTechnical-4
5.Tapping speed and RevolutionTechnical-5
6.Tapping TorqueTechnical-6

Metric Thread and Gauge Profile 7. Technical-9

8. Length of engagement Technical-11

9. Classes of Internal Threads and Classes Technical-13 of Cutting Taps 10. About UNJ Threads Technical-17 11. Accuracy of external threads and Technical-18 accuracy of Dies 12. Guide to Thread Forming Taps (Roll Taps) Technical-19 13. How to set the tap's oversize to meet with Technical-21 the coating margin of internal threads 14. Tap, Thread Limits Technical-23 15. Bored hole size before tapping Technical-35 ( for thread cutting ) 16. Bored hole size before tapping Technical-45 ( for thread forming ) 17. Bar diameter for external threads Technical-47 (for cutting type dies)

18. Bar diameter of external threads Technical-50 (for thread rolling dies) 19. Surface Treatment Technical-51 20. Carbide Taps Technical-54 21. Taps for Pipe Threads Technical-56 22. Features of MC-Helical Thread Mills Technical-65 23. Selecting different tap holder combinations Technical-69 by machine feed system 24. The mechanism for a tap to cut oversize Technical-71 on an internal thread 25. Trouble Shooting Technical-73 26. Center Drills Technical-77 27. Table of recommend centering condition Technical-78 28. Thread Series Technical-80 29. Basic profile of threads Technical-82 30. Symbols for Standard Threads Technical-85 31. Cross chart of thread cutting tool standard Technical-88 32. Hardness conversion table Technical-89 33. Conversion table from inch to millimeter Technical-90 34. Materials used for Cutting Tools Technical-91