SMC Networks CKZ3N-X2742A Series User manual

Document No. CKZ*-OM0204Q
PRODUCT NAME
POWERCLAMPCYLINDER
MODEL / Series / Product Number
CKZ3N-X2742A/X2568 Series (φ50, 63)
CKZ3T-X2734/X2568 Series (φ50, 63)

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Contents
Safety Instructions
Ｐ３，４
1. Installation
1-1. Common precautions for power clamp cylinder Ｐ５
1-2. Power clamp cylinder mounting and setup procedure Ｐ６～７
1-3. Relation between shim thickness and clamping force Ｐ８～１０
1-4. Clamp arm Ｐ１１～１３
1-5. Manual lock release Ｐ１４
1-6. Space in design
1-7. To change the arm opening angle Ｐ１５
1-8. Top cover replacement Ｐ１６
1-9. Change of the piping port position
1-10. Mounting of end lock spring and handle (for X2568) Ｐ１７
2. Product Specifications
2-1. CKZ3N-X2742A/X2568 series Ｐ１８
·How to Order
·Cylinder Specifications Ｐ１９
·Weight (Cylinder Without Clamp Arm)
·Cylinder Stroke
·Proximity Switch Specifications
·Connection connector cable
·Replacement Parts Ｐ２０
·Dimensions: Base Type Ｐ２１
·Dimensions: With Manually Operated Handle Ｐ２２
·Clamp Arm Code List Ｐ２３
·Dimensions: Clamp Arm Bore size: 50 Ｐ２３，２４
·Dimensions: Clamp Arm Bore size: 63 Ｐ２５，２６
2-2. CKZ3T-X2734/X2568 series
·How to Order Ｐ２７
·Cylinder Specifications Ｐ２８
·Weight (Cylinder Without Clamp Arm)
·Cylinder Stroke
·Proximity Switch Specifications
·Connection connector cable
·Replacement Parts Ｐ２９
·Dimensions Ｐ３０
·Dimensions: With Manually Operated Handle Ｐ３１

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Contents
·Dimensions: Clamp Arm Bore size: 50
Ｐ３２
·Dimensions: Clamp Arm Bore size: 63 Ｐ３３
Troubleshooting Ｐ３４，３５

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3
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Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,”“Warning”or “Danger.”
They are all important notes for safety and must be followed in addition to International Standards
(ISO/IEC)*1) , and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems.
ISO 4413: Hydraulic fluid power -- General rules relating to systems.
IEC 60204-1: Safety of machinery -- Electrical equipment of machines .(Part 1: General requirements)
ISO 10218: Manipulating industrial robots -Safety.
etc.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Danger Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person who
has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when configuring the
equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be
performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.
1.The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2.When the product is to be removed, confirm that the safety measures as mentioned above are implemented
and the power from any appropriate source is cut, and read and understand the specific product precautions
of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to
be used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or
other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special safety
analysis.
4.Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

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4
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Safety Instructions
Caution
The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange
specifications or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer”and “Compliance
Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1.The warranty period of the product is 1 year in service or 1.5 years after the product is
delivered,whichever is first.*2)
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
*2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum
pad or failure due to the deterioration of rubber material are not covered by the limited
warranty.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction(WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules governing that export
are known and followed.
Caution
SMC products are not intended for use as instruments for legal metrology.
Measurement instruments that SMC manufactures or sells have not been qualified by type approval tests
relevant to the metrology (measurement) laws of each country.
Therefore, SMC products cannot be used for business or certification ordained by the metrology
(measurement) laws of each country.

For actuator precautions, refer to the “Handling Precautions for SMC Products”on the SMC website:
http://www.smcworld.com
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Figure 1
Clamping range : 0 to +3°
Angle tolerance of the clamp : 0 to +0.5°
0°
Caution
(1) The tightening torque of clamp arm fixing bolt is 12 to 15 N･m for φ50 and 15 to 20 N･m for
φ63.
Refer to pages 23 to 26 for the CKZ3N-X2742A type and pages 32 and 33 for the
CKZ3T-X2734 type for details on the clamp arm.
(2) This product is designed to be used after being externally adjusted using a shim, and there is a
mechanical difference of 0 to +0.5° at the clamping end. (Figure 1)
(3) Adjust the angle of the clamp end so that the clamp arm contacts the workpiece at +3° or less.
(Figure 1)
If the clamp arm contacts the workpiece at an angle of more than +3°, the clamp cylinder may
be damaged.
(4) Be sure to use a speed controller, and make adjustments according to the following conditions.
Unclamping to clamping: 1 second or more, Clamping to unclamping: 1 second or more
If excessive kinetic energy is applied, there is a possibility of damage.
(5) When using a side guide:
Attach the side guide so that lateral loads, such as galling, etc., are not applied
to the clamp arm.
(6) Refer to the table below for the angle tolerance of the arm during unclamping.
(7) Do not disassemble the power clamp cylinder.
The power clamp cylinder consists of a completely sealed structure in order to protect it from
welding spatter. Do not disassemble, except for when replacing any of the replaceable parts, as
this may cause the performance to deteriorate.
(8) Proximity switch output
The switch output signal is output near the clamping end and the unclamping end respectively.
The switch output signal on the clamping side does not output the status where the power
clamp cylinder is locked by the toggle mechanism.
(9) Lubricating the toggle mechanism
The toggle mechanism has been lubricated for life at the factory and can be used without any
further lubrication. Do not lubricate.
Common precautions for power cla
mp cylinder
1
0 0 0 0 0 0 0 0 0
-4 -5 -5 -5 -5 -5 -5 -6 -9
0 0 0 0 0 0 0 0 0
-3 -4 -5 -5 -5 -5 -5 -6 -9
30
4530
Bore
(mm)
50
63
15
15
45 60
60
75
75
90
90
105
105
120
120
135
135
135
Arm angle(°）
75 90 105 12015 30 45 60

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<Ex. 1 When using clamping force only : When equipped with a workpiece receptacle>
A) Place the workpiece, supply air to the clamping port without attaching the block on the arm side,
and operate the clamp arm to the end of the clamp.
B) In the state of A), attach the workpiece and the arm side block, and adjust the shim so that there
is a space of about 0 mm.
During this step, theoretically, there is no clamping force pressing down on the workpiece.
C) In order to generate a clamping force from the state described in step B), insert an additional
shim.
The thickness of the shim changes depending on the arm length and the operating pressure.
Refer to page 8 to 10.
Please note that the graph should only be used as a guide as there is a tolerance of about 10%
in the clamp cylinder body.
D) Exhaust the air while in the clamped state, and confirm that the clamp arm does not open.
Power clamp cylinder mounting and setup procedure
2
●CKZ3N-X2742Atype
●CKZ3T-X2734 type

- 7 -
<Ex. 2 When using a hard stop: When not equipped with a workpiece receptacle>
A) Supply air to the clamping port without installing the upper hard stop, and operate the clamp arm
to the end of the clamp.
B) In the state of A), attach the upper hard stop and adjust shim ①so that there is a space of
about 0 mm between the upper hard stop and the hard stop.
During this step, theoretically, there is no clamping force applied to the hard stop.
C) In order to generate a clamping force from the state described in step B), insert an additional
shim.
The thickness of the shim changes depending on the distance to the hard stop and the operating
pressure.
Refer to page 8 to 10, and consider the distance to the hard stop as the arm length.
Please note that the graph should only be used as a guide as there is a tolerance of about 10%
in the clamp cylinder body.
D) In the state of C), adjust shim ②so that the arm side block contacts the workpiece.
E) Exhaust the air while in the clamped state, and confirm that the clamp arm does not open.
●CKZ3N-X2742Atype
●CKZ3T-X2734 type

- 8 -
*Use this figure as a guide as there is a tolerance of about 10% in the clamp cylinder body.
*When a shim exceeding the peak clamping force position on the graph is inserted, the lock will
not be activated when clamped.
Insert a shim of the appropriate thickness.
*The arm length indicates the distance between the clamp arm shaft and the clamping position.
For distance “A”between the knock positioning pinhole and the clamp arm shaft, refer to Table
1.
Relation between shim thickness and clamping force
3
●CKZ3N-X2742Atype ●CKZ3T-X2734 type
0
500
1000
1500
2000
2500
3000
3500
4000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim thickness (mm)
Arm length L：100mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3 MPa
0.5MPa
0.7MPa
Rec ommended
shim thickne ss
0
500
1000
1500
2000
2500
3000
3500
4000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim thickness (mm)
Arm length L：150mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3MPa
0.5MPa
0.7MPa
Recommended
shim th ickness
φ50

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0
500
1000
1500
2000
2500
3000
3500
4000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim thickness (mm)
Arm length L：100mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3MPa
0.5MPa
0.7MPa
Rec ommen ded
shim thickness
φ63
0
500
1000
1500
2000
2500
3000
3500
4000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim thickness (mm)
Arm length L：150mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3MPa
0.5MPa
0.7MPa
Rec ommen ded
shim thickness
0
500
1000
1500
2000
2500
3000
3500
4000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim thickness (mm)
Arm length L：200mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3MPa
0.5MPa
0.7MPa
Rec ommen ded
shim thickness
0
500
1000
1500
2000
2500
3000
3500
4000
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim
thickness (mm)
Arm length L：250mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3MPa
0.5MPa
0.7MPa
Rec ommen ded
shim thic kness

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0
200
400
600
800
1000
1200
1400
1600
1800
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
Clamping force (N)
Shim
thickness (mm)
Arm length L：300mm
Peak clamping
force position
0.7MPa
0.5MPa
0.3MPa
0.3MPa
0.5MPa
0.7MPa
Rec ommen ded
shim thickness

- 11 -
nRelation between arm length and clamping force
nAllowable arm length
Clamp arm
4
●CKZ3N-X2742Atype ●CKZ3T-X2734 type
●CKZ3N-X2742Atype
●CKZ3T-X2734 type

- 12 -
nAllowable load mass
●CKZ3N-X2742Atype ●CKZ3T-X2734 type

- 13 -
nMounting of the arm
1) Make sure that the air has been discharged from the cylinder.
2) Mount the arm to the clamp cylinder, then tighten it with the hexagon socket head cap
screws to the tightening torque below.
The clamp arm may interfere with the cylinder body depending on the mounting method.
Be sure to check for interference.
nVertical clamping (CKZ3T-X2734 type only)
When mounting the clamp arm in a vertical clamping
position,mount as shown in the figure below.
The maximum arm opening angle is 105°. In the case
of a metal cover type, select a 45 mm offset for the
clamp arm. When a 15 mm offset is selected, the
metal cover and clamp arm will interfere and the lock
cannot be released manually.
Arm
Clamp cylinder
Spring washer
Hexagon socket
head cap screws
Take care not to get
your finger caught!
Arm
Spring washer
Hexagon socket
head cap screws
Arm holding bracket
Clamp cylinder

- 14 -
Be sure to confirm safety before manually releasing the lock, and only perform work while the air is
exhausted.
Otherwise, the clamp arm may operate unexpectedly.
lIn the case of a rubber cover, the lock can be released easily by hitting the round tab on the
cover with a plastic hammer.
lIn the case of a metal cover, the lock can be released easily by opening the cover and hitting
the tab of the knuckle joint with a plastic hammer.
[Tightening torque of the clamp arm is 1.5 to 2.0 N・m]
Leave sufficient space in the below position.
Space
●Space to wiring a proximity switch ●Space to perform a manual lock release
Space in design
6
Manual lock rel
ease
5
Open / Close
Hit
The bolt for
opening / closing

- 15 -
1. Procedure for changing the stopper bolt position
1) Remove the stopper bolt of the head cover, and replace with a stopper bolt for the desired
angle using the tightening torque below.
When tightening the stopper bolt, hold the head cover.
Refer to Replacement Parts (CKZ3N-X2742A: P20., CKZ3T-X2734 : P.29) for the part
numbers of the applicable stopper bolts.
2. Procedure for changing the switch position
1) Loosen the switch cassette mounting bolt, and remove the switch cassette.
2) Remove the switch on the unclamping side, and attach it in the position of the desired
angle. Store the lead wire in the storage space.
3) Mount the switch cassette to the body, and tighten the switch cassette mounting bolt to the
tightening torque shown below.
Refer to Replacement Parts (CKZ3N-X2742A: P.20, CKZ3T-X2734 : P.29) for the part
numbers of the switch cassette replacement parts.
To change the arm opening angle
7
●CKZ3N-X2742Atype
●CKZ3T-X2734 type

- 16 -
1) Mount the top cover to the clamp cylinder, then tighten it to the specified tightening torque
below.
2) It is possible to change from a rubber cover type to a metal cover type.
Refer to Replacement Parts (CKZ3N-X2742A: P.20, CKZ3T-X2734 : P.29) for the part numbers
of the top cover replacement parts.
1) Make sure that the air has been discharged from the cylinder.
2) It the piping port of side A below is used, remove the plug and plug the port of side B with it.
Apply seal tape around the plug so that air will not leak during operation.
(Seal tape is not necessary for the G port plug)
Change of the piping port position
9
Top cov
er replacement
8

- 17 -
1) Place the end lock spring according to the adjusted opening angle which can be seen on end
lock plate display.
[ Tighthening torque : 1.5 to 2.0 N・m ]
2) Mount the manual handle vertically in the clamp position.
[ Tighthening torque : 3.0 to 3.9 N・m ]
●CKZ3N-X2568 type
●CKZ3T-X2568 type
Hexagon socket
head cap screw
Hexagon socket
head cap screw
●CKZ3N-X2568 type
●CKZ3T-X2568 type
Hexagon socket
head cap screw
End lock spring
Hexagon socket
head cap screw
End lock spring
Mounting of end lock spring and handle (for X2568)
10

- 18 -
(Refer to pages 23 to 26.)

- 19 -
Use M12-4 pin socket (female) Acord.
* Refer to pages 23 to 26 for the weight of clamp arms.