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2-6. Allowable kinetic energy
The applied kinetic energy must be within the allowable value when an inertial load is
actuated.
Please refer to "Fig.1 Allowable lateral load applied to rod end" (Page 8)
Table 1 Allowable kinetic energy
[J]
Bore size
φ20
φ25
φ32
φ40
Rod end male
thread
0.27
0.4
0.65
1.2
Rod end female
thread
0.11
0.18
0.29
0.52
The allowable kinetic energy is different between the cylinders with male rod end and with
female rod end due to the different thread sizes.
Warning
Use the actuator with allowable kinetic energy (Table 1) or less.
Operation with a kinetic energy over the allowable value can break the product and
cause injury or damage to equipment. If excessive kinetic energy is expected, install an
external absorber to prevent impact to the body of the product. In this case, please verify
the rigidity of the equipment carefully.
2-7. Control of direction
To switch the operating direction of the cylinder, mount an applicable solenoid valve
selected from SMC's range of solenoid valves.
Warning
1) Design a circuit to prevent sudden action of a driven object.
When the product is actuated by an exhaust center type directional control valve or when
one side of the piston is pressurized with air exhaust, such as when the product is
started after the exhaust of the residual pressure from the circuit, driven objects may act
suddenly at high speed. In such cases, injury may occur, such as hands or feet getting
caught in the machinery, or damage to the machinery itself may occur. Design the
machinery using equipment to prevent sudden action.
2) Intermediate stop
It is difficult for this product to make a piston stop at the required intermediate position
accurately and precisely by a 3 position closed center type directional control valve, due
to the compressibility of air.
Furthermore, since valves and cylinders are not guaranteed for zero air leakage, it may
not be possible to hold a stopped position for extended periods of time. Contact SMC if it
is necessary to hold the stopped position for extended periods of time.
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