Mounting And Installation - SMC Networks JMDB 32 Series Operation Manual

Consider the possibility of power source related malfunction that could occur.

For the equipment that rely on power sources such as compressed air, electricity, or hydraulic
pressure, adopt a countermeasure to prevent the equipment from causing a hazard to humans
or damage to the equipment in the event of malfunction.
Consider the behavior of the rotary actuator in the event of an emergency

stop.
Devise a safety system so that if a person engages the emergency stop, or if a safety device is
tripped during a system malfunction such as a power outage, the movement of the cylinder will
not cause a hazard to humans or damage the equipment.
Avoid synchronized operation using cylinders only.

Even if multiple pneumatic cylinders are initially set to the same speed, their speed may vary
due to changes in operating conditions. Therefore, avoid designs where a single load is moved
by synchronizing multiple cylinder operations.
Consider the action when operation is restarted after an emergency stop or

abnormal stop.
Design the machinery so that injury or equipment damage will not occur upon restart of
operation. When the cylinder has to be reset at the starting position, install manual safety
equipment.
Intermediate stop

It is difficult for this product to make a piston stop at the required intermediate position
accurately and precisely using 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.
Caution
！
Avoid having a large gap between the clevis and mating bushing, as this

exposes the pin to a bending load.
Do not touch the cylinder during high speed and high frequency operation

of the cylinder.
When the cylinder is operating at a high speed and high frequency, the cylinder tube surface
temperature increases, and may cause a burn.
Do not use the air cylinder as an air-hydro cylinder.

If working fluid of the air cylinder is turbine oil, oil leakage can result.
Grease is applied to cylinder.

The base oil of grease may seep out.

The base oil of grease in the cylinder may seep out of the tube, cover, crimped part or rod
bushing depending on the operating conditions (ambient temperature 40 oC or more,
pressurized condition, low frequency operation).
Be especially careful when a clean environment is required.

2-3. Mounting and Installation

Caution
！
Do not apply excessive lateral load to the piston rod.

The bold solid lines in Fig. 1 show the allowable lateral load on the cylinder for a certain stroke
length.
Refer to Fig. 3 Maximum Allowable Kinetic Energy.(Page 9)
Bushing (bearing)
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