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10
10.1 Thread
Thread parameters
To determine the thread parameters, the control uses the following
table.
Where:
F: Thread pitch is calculated from the diameter, depending on
the thread type, where an asterisk * is given
Further information:
P: Thread depth
R: Thread width
A: Thread angle, left
W: Thread angle, right
Calculation formula: Kb = 0.26384 * F – 0.1 * # F
Thread backlash ac (depending on the 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
Sort of thread Q
Q = 1 Metric ISO fine-pitch thread
Q = 2 Metric ISO thread
Q = 3 Metric ISO tapered thread
Q = 4 Metric ISO tapered fine-pitch thread
Q = 5 Metric ISO trapezoid thread
Q = 6 Flat metric trapezoid thread
Q = 7 Metric buttress thread
Q = 8 Cylindrical round thread
Q = 9 Cylindrical Whitworth thread
Q = 10 Tapered Whitworth thread
Q = 11 Whitworth pipe thread
Q = 12 Nonstandard thread
Q = 13 UNC US coarse thread
678
"Thread", Page 678
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Internal
F
P
R
0.61343 * F
F
–
–
0.54127 * F
F
*
0.61343 * F
F
*
0.54127 * F
F
–
0.61343 * F
F
–
0.61343 * F
F
–
0.5 * F + ac
0.633 * F
–
0.5 * F + ac
0.633 * F
–
0.3 * F + ac
0.527 * F
–
0.3 * F + ac
0.527 * F
–
0.86777 * F
0.73616 * F
0.75 * F
F – Kb
–
*
0.5 * F
F
*
0.5 * F
F
*
0.64033 * F
F
*
0.64033 * F
F
*
0.640327 * F
F
*
0.640327 * F
F
*
0.640327 * F
F
–
–
–
*
0.61343 * F
F
*
0.54127 * F
F
HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
Tables and overviews | Thread
A
W
30°
30°
30°
30°
30°
30°
30°
30°
30°
30°
30°
30°
15°
15°
15°
15°
15°
15°
15°
15°
3°
30°
30°
3°
15°
15°
15°
15°
27 .5°
27 .5°
27 .5°
27 .5°
27 .5°
27 .5°
27 .5°
27 .5°
27 .5°
27 .5°
–
–
30°
30°
30°
30°
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