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9.1 Thread pitch
9.1 Thread pitch
Thread parameters
To determine the thread parameters, the CNC PILOT uses the
following table.
Where:
F: Thread pitch. Where an asterisk "*" is given in the table, the thread
pitch is calculated from the diameter, depending on the thread type
(Siehe „Thread pitch” auf Seite 609.).
P: Thread depth
R: Thread width
A: Thread angle at left
W: Thread angle at right
Calculation: Kb = 0.26384*F – 0.1* F
Thread backlash "ac" (depending on thread pitch):
Thread pitch <= 1: ac = 0.15
Thread pitch <= 2: ac = 0.25
Thread pitch <= 6: ac = 0.5
Thread pitch <= 13: ac = 1
Thread type Q F P R A W
Q=1 Metric ISO fine-pitch thread External 0.61343*F F 3 30°
Internal 0.54127*F F 3 30°
Q=2 Metric ISO thread External * 0.61343*F F 30° 30°
Internal * 0.54127*F F 30° 30°
Q=3 Metric ISO tapered thread External 0.61343*F F 3 30°
Q=4 Metric ISO tapered fine-pitch thread 0.61343*F F 3 30°
Q=5 Metric ISO trapezoid thread External 0.5*F+ac 0.633*F 15° 15°
Internal 0.5*F+ac 0.633*F 1 15°
Q=6 Flat metric trapezoid thread External 0.3*F+ac 0.527*F 1 15°
Internal 0.3*F+ac 0.527*F 1 15°
Q=7 Metric buttress thread External 0.86777*F 0.73616*F 3° 30°
Internal 0.75*F F–Kb 3
Q=8 Cylindrical round thread External * 0.5*F F 1 15°
Internal * 0.5*F F 1 15°
Q=9 Cylindrical Whitworth thread External * 0.64033*F F 27.5° 27.5°
Internal * 0.64033*F F 27.5° 27.5°
Q=10 Tapered Whitworth thread External * 0.640327*F F 27.5° 27.5°
Q=11 Whitworth pipe thread External * 0.640327*F F 27.5° 27.5°
Internal * 0.640327*F F 27.5° 27.5°
608


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