Rohm CAPTIS-M, Translation Of The Original Operating Manual

Page: 85 / 249

Operation
122017 / 1.0 83
7.2 Basic Principles
L
w
Fig. 3: Unclamping length
■ Unclamping length (L
w
): The maximum unclamping length (L
w
)
which may be machined without the support of a bezel or tailstock is
a maximum of 5 times
the clamping diameter (D
sp
).
■ Clamping length (L
sp
): The minimum clamping length within the collet
chuck without the support of a bezel or tailstock must
not be less than
half of the clamping diameter (D
sp
) with a minimum length of
10 mm
.
Examples:
D
sp
= 40 mm ==> min. L
sp
= 20 mm
D
sp
= 10 mm ==> min. L
sp
= 10 mm.
L
sp
D
sp
Fig. 4: Clamping length
The maximum weight of the part to be clamped depends on the geometry
and the chuck size. The necessary clamping force must always be
calculated in accordance with the valid standards and directives. Failure to
observe this may lead to serious accidents due to clamped parts coming
loose!