Introduction to Industrial Automation

Figure 5.3  Cross section of a single-acting cylinder.

(a)

(b)

Figure 5.4  Pneumatic symbols of a single-acting cylinder: (a) rod normally in, and (b) rod 

normally out.

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Elements of Electro-Pneumatic Components 

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165

of the pressurized air connections, the moving piston, the rod with thread at the end for connection 

to the load, and the O-rings for the sealing of the chambers are visible.

Except for the previous two main types of pneumatic cylinders, as shown in Figure 5.6, there 

are several additional types of cylinders for specific applications, such as:

 

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Cylinders with a motion dampener at the end of the movement, or double-acting cylinders 

with adjustable cushioning at both ends

 

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Double-acting cylinders with a double rod end

 

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Non-rotating rod cylinders with twin rods

 

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Series connection of cylinders and cylinders of multiple positions

 

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Cylinders with an impact velocity

Furthermore, a general representation of the final concept of cylinders that can transform the 

translational movement into a rotational one are described in Figure 5.7.

Inlet/outlet ports

Bilateral piston seal

= Piston moves to right 

= Piston moves to left 

(a)

(b)