Токарный резьбонарезной инструмент Mitsubishi THREADING Державки и пластины SHIM REFERENCE GRAPH (Thread angle 30° and 29 ) Right Hand Thread Lef

Токарный резьбонарезной инструмент Mitsubishi THREADING Державки и пластины SHIM REFERENCE GRAPH (Thread angle 30° and 29 ) Right Hand Thread Lef

Токарный резьбонарезной инструмент Mitsubishi THREADING Державки и пластины SHIM REFERENCE GRAPH (Thread angle 30° and 29 ) Right Hand Thread Left Hand Thread Threading Diameter (mm) Threading Diameter (mm) (Note) When a thread lead angle < the tool flank angle, change the shim to prevent side Interference with the Insert. (Refer to the table below for the calculation of thread lead angle and tool flank angle.) Selection table Lead Angle Opening angle 60755° Right Hand Thread Opening angle 60755° Left Hand Thread Opening angle 30729° Right Hand Thread Opening angle 30729° Left Hand Thread 0 P05 P05 N05 N05 P05 P05 N05 N05 0.5 P05 P05 N05 N05 P05 P05 N05 N05 1 P15 P15 N15 N15 P15 P15 N15 N15 1.5 P15 P15 N15 N15 P15 P15 N15 N15 2 P25 P25 N15 N15 P25 P25 Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible 2.5 P25 P25 Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible Compatible P25 P25 3 P35 P35 P35 P35 3.5 P35 P35 P35 P35 4 P45 P45 P45 P45 4.5 P45 P45 P45 P45 5 P45 P45 Compatible Compatible Compatible Compatible 5.5 Compatible Compatible (Note) Back turning In the case of left hand threads. When replacing a shim, check if the difference between the thread lead angle and shim inclination angle is within: 2.5° 0.5° where thread helix angle is 60° (55°) 2° 1° where thread helix angle is 30° (29°) Inclination angle of a standard shim is 0°. The holder has a 1.5° lead angle. CALCULATION OF THREAD LEAD ANGLE a: Lead angle I: Lead n: Number of threads P: Pitch d: Effective diameter of thread tana = nd nP 7Td EXAMPLE OF SELECTING A SHIM When the thread lead angle Is 2.2° In the case when the thread helix angle Is 60° (2.2° lead angle) (2.5 0.5°) = -0.3° 1.7° shim inclination angle is appropriate. Although cutting is possible even with a standard sheet (sheet inclination angle of 0°), it is recommended to replace it with a sheet from the Sheet Specification Table having an inclination angle of 1°. ln the case when the thread helix angle is 30° (2.2° lead angle) (2 1°) = -0.2° 1.2° shim inclination angle is appropriate. Replace with a sheet from the Sheet Specification Table having an inclination angle of 1°. Refer to the web catalogue. RELIEF ANGLE OF AN INSERT SET ON A HOLDER Thread Helix Angle Internal Relief Angle External Relief Angle 60° 8.8° 5.8° 55° 7.9° 5.2° 30“ 4.1° 2.7° 29° 4° 2.6° 1 Relief angles (&, >3i) of an insert become small when the thread helix angle of a trapezoidal, round, or other thread is small. Take care when selecting a shim. http://www.carbide.mht.co.th/technical information/tec turning tools/tec threading Mitsubishi Materials 597 THREADING