
B–61804E–2/05
2. CAUTIONS FOR USING
Symbolic FAPT
VARIOUS FUNCTIONS AND
PRECAUTIONS OF Symbolic FAPT
75
D1: First threading depth (Absolute quantity: Material file)
Di: i–th threading depth (Absolute quantity)
Dk: Threading depth once before the last
D: Last threading depth (Incremental quantity: system parameter)
Since Dk is not calculated by the above equation, it is possible that Dk
becomes an increment smaller than D.
When the prompt of the depth of screw is displayed, press the softkey
“OVER THREAD” or “INNER THREAD”, then the depth of screw is
calculated automatically.
When asking of screw thread depth, automatically calculated contents
which is displayed on CRT can be changed.
(Example)
M20, P: Pitch
Minor diameter of internal
thread is calculated by the
following equation.
Inner dia. = 20 – (P x 0.6495)
CAUTION
Even in the case when the depth of screw thread is input
from keys (not automatically calculated value), recalculation
is executed by inputting multiplier or pitch. In this case, the
required depth of screw thread must be input from keys.
2.9.2
Threading Depth
2.9.3
Depth of Screw Thread