Technical data
03.00|0889148_ROTA NCX |en
25
Calculation example: required initial clamping force for a given
speed
Required initial clamping force F
sp0
for a given speed n
The following data is known for the machining job:
•
Gripping from the outside in (application-specific)
•
Machining force F
spz
= 3000 N (application-specific)
•
max. speed of rotation n
max
= 3200
rpm
("Chuck data" table)
•
RPM n = 1200 rpm (application-specific)
•
Mass of one (!) top jaw m
AB
= 5.33 kg (application-
specific)
•
Center of gravity radius of top jaw r
sAB
= 0.107 m (application-
specific)
•
Safety factor S
z
= 1.5 (according to VDI 3106)
•
Safety factor S
sp
= 1.5 (according to VDI 3106)
Note:
Masses of the jaw mounting screws and T-nuts are not taken
into account.
First the required effective clamping force F
sp
is calculated using
the machining force stated:
Initial clamping force during shutdown:
Calculation of total centrifugal force:
For two-part chuck jaws, the following applies:
Centrifugal torque of base jaw and top jaw specified in "Chuck
data" table:
For the centrifugal torque of the top jaw, the following applies:
Centrifugal torque for one jaw:
3.3.2
