HEIDENHAIN CNC Pilot 4290 - Manual (Page 440)

11 Tables and overviews 428
11
.1 Under
cut and
Thr
ead P
a
ra
met
ers
The ”backlash of threads” (ac) is determined from
the thread pitch.
Thread pitch ac
<= 1 0.15
<= 5 0.25
<= 12 0.5
> 12 1
Calculation of Kb
Kb = 0.26384*F – 0.1* ¹F
11.1.4 Thread Parameters
To determine the thread parameters, the CNC PILOT uses the
following table. Where F = *, the thread pitch—depending on the
thread type—is determined from the diameter.
Where:
F = thread pitch
P = thread depth
R = thread width
A = thread angle, left
W = thread angle, right
Continued
Thread type Q F P R A W
Q=1 Metric ISO fine-pitch thread (DIN 13) Outside – 0.61343*F F 30° 30°
Inside – 0.54127*F F 30° 30°
Q=2 Metric ISO thread (DIN 13) Outside * 0.61343*F F 30° 30°
Inside * 0.54127*F F 30° 30°
Q=3 Metric ISO tapered thread (DIN 158) Outside – 0.61343*F F 30° 30°
Q=4 Metric ISO tapered thread (DIN 158) – 0.61343*F F 30° 30°
Q=5 Metric ISO trapezoid thread Outside – 0.5*F+ac 0.633*F 15° 15°
Inside 0.5*F+ac 0.633*F 15° 15°
Q=6 Flat metr. trapezoid thread (DIN 308) Outside – 0.3*F+ac 0.527*F 15° 15°
Inside 0.3*F+ac 0.527*F 15° 15°
Q=7 Metric buttress thread (DIN 513) Outside – 0.86777*F 0.73616*F 3° 30°
Inside – 0.75*F F–Kb 30° 3°
Q=8 Cylindrical round thread (DIN 405) Outside * 0.5*F F 15° 15°
Inside * 0.5*F F 15° 15°
Q=8 Cylindrical Whitworth thread (DIN 11) Outside * 0.64033*F F 27.5° 27.5°
Inside * 0.64033*F F 27.5° 27.5°
Q=10 Tapered Whitworth thread (DIN 2999) Outside * 0.640327*F F 27.5° 27.5°
Q=11 Whitworth pipe thread (DIN 259) Outside * 0.640327*F F 27.5° 27.5°
Inside * 0.640327*F F 27.5° 27.5°
Q=12 Nonstandard thread – – – – –
Q=13 UNC US coarse thread Outside * 0.61343*F F 30° 30°
Inside * 0.54127*F F 30° 30°
Q=14 UNF US fine-pitch thread Outside * 0.61343*F F 30° 30°
Inside * 0.54127*F F 30° 30°