Description of productsTechnical Information TECHNICAL INFORMATION 1. Terminology of Taps2. Flutes Technical-1Technical-218.Bar diameter of external threads(for thread rolling dies)Technical-5719.Surface TreatmentTechnical-58 3. Edge angle and Cutting allowance of taps Technical-3 20.Carbide Taps Technical-61 4. Recommended Tapping Speeds Technical-4 21.Taps for Pipe Threads Technical-63 5. Tapping speed and Revolution Speed Technical-5 22.Features of MC-Helical Thread Mills Technical-72 6. Tapping Torque Technical-67. Metric Thread and Gauge ProfileTechnical-923.S electing different tap holder combinationsTechnical-79by machine feed system 8. Length of engagement Technical-11 24.T he mechanism for a tap to cut oversize Technical-81 9. Classes of Internal Threads and Classes of Taps on an internal threadTechnical-1325.Trouble ShootingTechnical-83 10. About UNJ Threads Technical-18 26.Center Drills Technical-87 11.Class of external threads and Technical-19 27.Table of recommend centering condition Technical-88 class of Dies 28.Thread Series Technical-90 12.Guide to Thread Forming Taps (Roll Taps) Technical-20 29.Basic profile of threads Technical-92 13.H ow to set the tap's oversize to meet withthe coating margin of internal threadsTechnical-2230.L ist of Thread Standards and NominalTechnical-95 Diameter Ranges of YAMAWA Taps 14.Tap, Thread Limits Technical-23 31.Cross chart of thread cutting tool standard Technical-98 15.B ored hole size before tapping( for thread cutting )Technical-3632.Hardness conversion table Technical-99 16.Bored hole size before tapping Technical-48 33.Conversion table from inch to millimeter Technical-100 ( for thread forming ) 34.Chemical Component table of work Technical-101 17.B ar diameter for external threads Technical-50 materials (for cutting type dies) 35.Materials used for Cutting Tools Technical-111 Technical-1005 For improvement, spec may change without advance notice.