TECHNICAL INFORMATION 1. Terminology of Taps Technical-1 18. Bar diameter of external threads Technical-50 2. Flutes Technical-2 (for thread rolling dies) 3. Edge angle and Cutting allowance of taps Technical-3 19. Surface Treatment Technical-51 4. Recommended Tapping Speeds Technical-4 20. Carbide Taps Technical-54 5. Tapping speed and Revolution Technical-5 21. Taps for Pipe Threads Technical-56 6. Tapping Torque Technical-6 22. Features of MC-Helical Thread Mills Technical-65 7. Metric Thread and Gauge Profile Technical-9 23. Selecting different tap holder combinations Technical-69 by machine feed system 8. Length of engagement Technical-11 Technical-71 24. The mechanism for a tap to cut oversize 9. Classes of Internal Threads and Classes Technical-13 on an internal thread of Cutting Taps 25. Trouble Shooting Technical-73 10. About UNJ Threads Technical-17 Technical-77 26. Center Drills 11.Accuracy of external threads and Technical-18 Technical-78 accuracy of Dies 27. Table of recommend centering condition 12. Guide to Thread Forming Taps (Roll Taps) Technical-19 28. Thread Series Technical-80 13. How to set the tap's oversize to meet with Technical-21 29. Basic profile of threads Technical-82 the coating margin of internal threads 30. Symbols for Standard Threads Technical-85 14. Tap, Thread Limits Technical-23 31. Cross chart of thread cutting tool standard Technical-88 15. Bored hole size before tapping Technical-35 32. Hardness conversion table Technical-89 ( for thread cutting ) 33. Conversion table from inch to millimeter Technical-90 16. Bored hole size before tapping Technical-45 34. Materials used for Cutting Tools Technical-91 ( for thread forming ) 17. Bar diameter for external threads Technical-47 (for cutting type dies)