Specifications

Free-mounting cylinder Series CU now
employs an air cushion mechanism.
Extended dimensions (compared to the standard
CU models) are hardly noticeable.
• Overall length: +1.5 to 7mm
• Overall height: +0 to 2mm
No air cushion protrusion!
• Overall width: not affected
New air cushion mechanism
Unique air cushion construction requires no cushion ring.
Free-Mounting Cylinder
with Air Cushion
Series CU
Series CU
Elimination of the cushion ring used in conventional type air cushions has made it
possible to reduce the overall length of the cylinder while retaining all the advantages of
a compact profile.
Operating
principle
q When the piston is retracting, air is exhausted
through both A and A' until piston seal H
passes air passage A.
w After piston seal H has passed air passage A,
air is exhausted only through A'. The section
marked with slanted lines becomes a cushion
chamber, and an air cushion effect is achieved.
e When air is supplied for the piston extension,
the check valve opens and the piston extends
with no delay.
A + A'
A
RH
Piston
seal
A'
A'
RH
A'
Features 1
(with rubber bumper)
Length
7
1.5
4
ø20
ø25
ø32
Height
2
0
0
Extended dimensions
Bore
size
(mm)
CU
with air cushion
CU
with
rubber bumper