The company reserves the right to vary models and dimensions without notice.
These products are designed for industrial applications and are not suitable for sale to the general public.
Rotary Actuators and Grippers
5
NORTH AMERICAN CYLINDER & ACTUATOR CATALOG
>
Release 8.5
ROTARY ACTUATORS AND GRIPPERS
283
New
To choose the most suitable gripper according to the weight of
the load that has to be moved, it is suggested to select a model
that develops a grip strength 20 times higher than the load
weight at least. In case of great acceleration or impact during
the load moving it is necessary to supply a wider margin.
EXAMPLE OF CALCULATION (see the diagram on the right)
Weight of the load to be moved (Kg) = 0.06
Coefficient of safety = 20
Gripping moment L (mm) = 30
Working pressure (MPa) = 0.5
F = grip force
Fmin [min. required grip force ] = 0,06kg x 20 x 9.8m/s² = 12N
(
minimum).
From the diagram we deduce that with the model CGSN16 the
gripping strength is 16N according to the distance from the grip
moment (L = 30mm) and at the pressure (0.5MPa) as shown
in the example. The grip force is 26 times higher than the
load weight. The condition requiring that grip force is 20 times
higher than the set grip force at least is thus satisfied.
EFFECTIVE GRIP FORCE
DRAWING LEGEND:
L = Gripping moment (mm)
F = Finger grip force (N)
The shown grip force corresponds to the grip force of a finger
when all fingers (or accessories) are in touch with the load.
LEGEND:
H = Grip arm (mm)
P = Pressure (MPa)
The load has to be maintained within the distance field from the
gripper barycentre (H) for a certain set pressure.
If the load is outside the recommended field for a certain
pressure, the product durability can be compromised.
Criteria to choose the most suitable model: 1) GRIP FORCE ANALYSIS
Criteria to choose the most suitable model: 1) GRIPPING MOMENT ANALYSIS
