Technical data
24
07.00|0889002_ROTA-S plus 2.0 with jaw lock |en-US
NOTICE
For safety reasons, in accordance with DIN EN 1550, the
centrifugal force may be a maximum of 67% of the initial
clamping force.
The formula for the calculation of the total centrifugal force F
c
is:
For this,
n is the given speed of rotation
in
RPM
. The product
m
B
∙ r
s
is referred to as the centrifugal force torque M
c
.
In case of lathe chucks with split chuck jaws, i.e., with base jaws
and top jaws, for which the base jaws change their radial position
only by the stroke amount, the
centrifugal torque of the base
jaws M
cGB
and the
centrifugal torque of the top jaws M
cAB
need to
be added:
The centrifugal torque of the base jaws M
cGB
can be found in the
table "Chuck data"
. The centrifugal torque of the
top jaws M
cAB
is calculated as per:
Calculation example: required initial clamping force Fsp0 for a
given RPM 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. RPM 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)
6.3.2
