Datasheet

Bolt should be detached under normal operation,
otherwise it may cause malfunction of the locking
feature.
16
Rubber cap
112
Series CBJ2
Specific Product Precautions
Be sure to read before handling. Please consult with SMC for products outside these
specifications.
Use Recommended Air Pressure Circuit.
Caution
• It is necessary for proper locking and unlocking.
Operating Pressure
Caution
Supply air pressure of 0.15 MPa or higher to the port on the
side that has the lock mechanism, as it is necessary for
disengaging the lock.
Exhaust Air Speed
Caution
The lock will engage automatically if the air pressure at the
port on the side that has the lock mechanism becomes 0.05
MPa or less. Be aware that if the piping on the side that has the
lock mechanism is narrow and long, or if the speed controller is
located far from the cylinder port, the exhaust air speed could
become slower, involving a longer time for the lock to engage.
A similar result will ensure if the silencer that is installed on the
exhaust port of the solenoid valve becomes clogged.
Manual Disengagement
Caution
Non-locking style manual release
Insert the bolt, which is provided as an accessory part, through
the rubber cap (it is not necessary to remove the rubber cap).
Screw the bolt into the lock piston and pull the bolt to
disengage the lock. Releasing the bolt will re-engage the lock.
The bolt size, pulling force, and the stroke are listed below.
Lock Disengagement
Caution
To disengage the lock, make sure to supply air pressure to the
port on the side without a lock mechanism, thus preventing the
load from being applied to the lock mechanism. (Refer to the
recommended air pressure circuit.) If the lock is disengaged
when the port on the side that does not contain a lock
mechanism is in the exhausted state and the load is being
applied to the lock mechanism, undue force will be applied to
the lock mechanism, and it may damage the lock mechanism.
Also, it could be extremely dangerous, because the piston rod
could move suddenly.
Selection
Caution
1. Do not use a 3 position solenoid valve.
Avoid using this cylinder in combination with a 3 position
solenoid valve (particularly the closed center metal seal type).
If air pressure becomes sealed inside the port on the side that
contains the lock mechanism, the lock will not engage. Even if
the lock is engaged at first, the air that leaks from the solenoid
valve could enter the cylinder and cause the lock to disengage
as time elapses.
2. Back pressure is necessary for unlocking.
Before starting, make sure that air is supplied to the side that is
not equipped with a lock mechanism as shown in the diagram
above. Otherwise, the lock may not disengage.
(Refer to “Rock Disengagement”.)
3. Disengage the lock before installing or adjusting the
cyliner.
The lock could become damaged if the cylinder is installed with
its lock engaged.
4. Operate the cylinder at a load ratio of 50% or less.
The lock might not disengage or might become damaged if a
load ratio of 50% is exceeded.
5. Do not synchronize multiple cylinders.
Do not operate two or more end lock cylinders synchronized to
move a single workpiece because one of the cylinder locks
may not be able to disengage when required.
6. Operate the speed controller under meter-out
control.
If operated under meter-in control, the lock might not
disengage.
7. On the side that has a lock, make sure to operate at
the stroke end of the cylinder.
The lock might not engage or disengage if the piston of the
cylinder has not reached the stroke end.
8. The position adjustment of the auto switch should
be performed at two positions; a position
determined by the stroke and a position after the
backlash movement (by 1 mm).
When a 2-color indication switch is adjusted to show green at
the stroke end, the indication may turn red when the cylinder
returns by the backlash. This, however, is not an error.
Bore size
(mm)
Thread size
M2.5 x 0.45 x 25
l or more
Pulling force
N
2
Stroke
(mm)
With head end lock With rod end lock
4.9
P0015-P0124-E.qxd 08.10.2 4:03 PM Page 112