SMC Networks MGZ Series User manual

®
Non-rotating Double Power Cylinder
MGZ Series
N348
External non-rotation guide unnecessary
Double output power in the extend direction
Large side loading capabilities
High strength and space savings

2
®
Air pressure supplied from A operates on surfaces 1 and 2. (extension)
Air pressure supplied from B operates on surface 3. (retraction)
Regulator with check
valve unnecessary
A regulator with check valve that is
required for a traditional lifting circuit
becomes unnecessary.
AB
AB
Tube rod diameter
External dimension
Sliding key x 2
Non-rotation guide
unnecessary
!
Employs a large bore tube rod up to 80% of the cylinder's
external square dimension + slide bearing. In addition, a
built-in non-rotation mechanism using sliding keys allows
direct mounting of loads.
Double output power for extension!
A unique construction doubles the pressurized area for extension.
An ideal air cylinder for lifting and pressing operations
Mounting accuracy
improved
Positioning holes are provided on the work piece
mounting surface for easy alignment.
Series MGZ
Non-rotating
Double Power Cylinder

3
®
Application examples
Chuck
Press
Robot Shooter
Lifter
Pusher
(Approx.
30% reduction)
Clean external appearance
Long stroke capability
& space savings
Strokes up to 1000mm are possible. Due to the construction,
the overall length is not two or more times the stroke as in the
case of conventional double output cylinders (tandem type).
High strength & space savings
Moment resistance is equal to a guide cylinder
(cylinder + two guide shafts).
Furthermore, the mounting cross section is reduced by
approximately 40%.
Piping is centralized on the head cover.
Auto switches are contained in grooves on
four sides.

4
®
Series MGZ Non-rotating Double Power Cylinder
Nil
S
3
n
2 pcs.
1 pc.
3 pcs.
"n" pcs.
Number of auto switches
Auto switch type
Standard Type
Bore size
MGZ
Stroke (mm)
Refer to the standard stroke table on page 5.
∗Select applicable auto switch models from the table below.
How to Order
40
50
63
Nil Without auto switch
(built-in magnet cylinder)
40mm
50mm
63mm
10040 Z73
Applicable auto switches/Direct mounting type
Special functionType Electrical
entry
Grommet
Indicator
light
Wiring
(output)
2 wire
3 wire
Load voltage
—
AC
DC
Lead wire length (m)∗
0.5
(Nil)
3
(L)
5
(Z)








—










—







IC circuit
Applicable loads
Auto switch models
Yes
IC circuit
100V or less
5V
5V, 12V
—
24V
Yes
———
2 wire
3 wire (NPN)
3 wire (PNP)
Reed switch
Solid state switch
——
—
—
Y69A
Y7PV
Y69B
Y7NWV
Y7PWV
Y7BWV
IC circuit
—
—
No
Water resistant ( 2 color indicator)
Diagnostic
indication
(2 color indicator)
——— Relay,
PLC
12V
24V
Grommet
—
IC circuit
Relay,
PLC
3 wire (NPN)
3 wire (PNP)
2 wire
—
5V, 12V
12V
5V, 12V
100V
Z76
Z73
Z80
Y59A
Y7P
Y59B
Y7NW
Y7PW
Y7BW
Y7BA
—
—
—
—
Electrical entry direction
Perpendicular In-line
Switch spacers
Applicable bore size (mm)
Switch spacer
40, 50, 63
BMP1-032
∗ Lead wire length symbols: 0.5m ...... Nil (Example) Y69B
3m ......... L Y69BL
5m ......... Z Y69BZ
∗∗ Solid state switches marked with a "" symbol are produced upon receipt of order.
∗∗∗ When later installing auto switches on a cylinder ordered without auto switches,
the switch spacers in the table below are necessary.

5
®
Non-rotating Double Power Cylinder Series MGZ
Specifications
Bore size (mm)
Action
Fluid
Proof pressure
Maximum operating pressure
Minimum operating pressure
Ambient and fluid temperature
Lubrication
Piston speed
Stroke length tolerance
Cushion
Thread tolerance
Port size
Double acting single rod
Air
1.5MPa (217.5psi)
1.0MPa (145psi)
0.08MPa (11.6psi)
Without auto switch –10 to 70°C (14 to 158°F) (with no freezing)
With auto switch – 10 to 60 °C (14 to 140°F) (with no freezing)
Non-lube
50 to 700mm/s (2 to 27.5in/s)
to 250 , 251 to 1000 mm
Rubber bumper
JIS class 2
40
+1.0
0
Standard strokes
40, 50, 63
Bore size (mm)
75, 100, 125, 150, 175
200, 250, 300
350, 400, 450, 500, 600
700, 800, 900, 1000
Standard strokes (mm) Long strokes (mm)
50 63
+1.4
0
1/4 1/4 1/4
Weight table
Bore size (mm)
Standard weight
Additional weight per 50mm of stroke
40
1.9 (4.2)
0.39 (0.86)
50
3.03 (6.7)
0.59 (1.30)
63
4.83 (10.6)
0.78 (1.72)
kg (lb.)
Theoretical Output
Bore size
(mm)
Model
MGZ40
MGZ50
MGZ63
20
25
32
OUT
IN
OUT
IN
OUT
IN
45 x 40
40
55 x 50
50
68 x 63
63
2533 (3.9)
942 (1.5)
3848 (6.0)
1473 (2.3)
5945 (9.2)
2313 (3.6)
Rod diameter
(mm)
Operating
direction
Piston area
mm²(in²)
Operating pressure MPa (psi)
N (lbf)
0.2
(29.0)
507
(114.0)
188
(42.3)
770
(173.1)
29
(66.3)
1189
(267.3)
463
(104.1)
0.3
(43.5)
760
(170.8)
283
(63.6)
1154
(259.4)
442
(99.4)
1784
(401.0)
694
(156.0)
0.4
(58.0)
1013
(227.7)
377
(84.7)
1539
(346.0)
589
(132.4)
2378
(534.6)
925
(207.9)
0.5
(72.5)
1267
(284.8)
471
(105.9)
1924
(432.5)
737
(165.7)
2973
(668.3)
1157
(260.1)
0.6
(87.0)
1520
(341.7)
565
(127.0)
2309
(519.1)
884
(198.7)
3567
(801.9)
1388
(312.0)
0.7
(101.5)
1773
(398.6)
659
(148.1)
2694
(605.6)
1031
(231.8)
4162
(935.6)
1619
(364.0)
0.8
(116.0)
2026
(455.4)
754
(169.5)
3078
(691.9)
1178
(264.8)
4756
(1069.1)
1850
(415.9)
0.9
(130.5)
2280
(512.5)
848
(190.6)
3463
(778.5)
1326
(298.1)
5351
1202.9)
2082
(468.0)
1.0
(145.0)
2533
(569.4)
942
(211.8)
3848
(865.0)
1473
(331.1)
5945
(1336.4)
2313
(520.0)
1in=25.4mm

6
®
Series MGZ Non-rotating Double Power Cylinder
Construction
Parts list
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Description Material
Aluminum alloy
Aluminum alloy
Aluminum alloy
Aluminum alloy
Carbon steel pipe
Carbon steel
Aluminum alloy
Aluminum alloy
Lead bronze casting
Lead bronze casting
Aluminum alloy
Carbon steel
Carbon steel
Rod cover
Head cover
Cylinder tube
Piston rod
Tube rod
Tube rod cover
Piston
Stationary piston
Bushing
Thrust plate
Holder
Pin
Tie-rod
Note
Clear anodized
Clear anodized
Hard anodized
Hard anodized
Hard chrome plated
Electroless nickel plated
Chromated
Chromated
Chromated
Zinc chromated
Corrosion resistant chromated
No.
14
15
16
17
18
19
20
21
22
23
24
25
Description
Tie-rod nut
Hexagon socket head cap screw
Spring washer
Bumper
Wear ring
Magnet
Rod seal A
Rod seal B
Piston seal
Piston gasket
Tube rod gasket
Cylinder tube gasket
Material
Carbon steel
Chrome molybdenum steel
Steel wire
Urethane
Resin
Magnetic material
NBR
NBR
NBR
NBR
NBR
NBR
Nickel plated
Nickel plated
Nickel plated
Note

7
®
Non-rotating Double Power Cylinder Series MGZ
Dimensions (mm)
to 1000
to 1000
to 1000
Stroke range
Bore size
(mm)
40
45
50
H
10
14
14
M
25
25
25
K
M6 x 1.0
M8 x 1.25
M8 x 1.25
J
78
92
110
I
23.5
28
34.5
GB
34.5
40
46.5
GA
36
46
53
KA
21
26
32
E
45
55
68
46
55
66
59
71
82
B
40
50
63
DC
to 1000
to 1000
to 1000
Stroke range
Bore size
(mm)
138
150
171
S
178
195
221
ZZ
9.5
12.5
15
Y
6
6
6
XL
M6 x 1.0
M8 x 1.25
M8 x 1.25
MM
12
16
16
XA
1/4
1/4
1/4
P
44
50
56
N
12
15
15
4
5
5
MB
40
50
63
MC
øI
2–Rc P
2 x 4–J
S + Stroke
MC
NK
HB
C
KA
E
4–MM depth M øXAH7 depth XL + 0.2
0
ZZ + Stroke
MB
MA
N
GA
GB
Y
øD
Y
18
18
18
MA
1in = 25.4mm

8
®
Series MGZ Non-rotating Double Power Cylinder
Electrical entry
Grommet
Grommet
Grommet (2 color indicator, with diagnostic output)
Grommet (2 color indicator, water resistant)
40
50
63
D-Z7, Z80
D-Y59, Y69, Y7P
D-Y7NW, Y7PW, Y7BW
D-Y7BAL
A
23
23
32
B
0
0
0
D-Z7, Z80
D-Y59, Y69, Y7P
D-Y7NW, Y7PW, Y7BW
D-Y7BAL
Applicable auto switches
Minimum strokes for mounting of auto switches
Be sure to read before handling.
Refer to pages 16 through 18 for auto switch precautions.
Auto switch models
Bore size
(mm)
Auto switch type
Reed switch
Solid state switch
Specific Product Precautions
D-Y59A (B), Y69A (B)
Y7P (V)
Auto switch type
Reed switch
Solid state switch
D-Z73, Z76, Z80
ø40 ø50 ø63
Number of
auto switches mounted
2 pcs. (same side)
1 pc., 2 pcs. (different sides)
2 pcs. (same side)
1 pc., 2 pcs. (different sides)
2 pcs. (same side)
1 pc., 2 pcs. (different sides)
2 pcs. (same side)
1pc., 2 pcs. (different sides)
D-Y7NW (V), Y7PW (V)
Y7BW (V)
D-Y7BAL
60
20
60
20
70
25
70
25
Auto Switches/Proper Mounting Position for Stroke End Detection
Auto Switch Mounting
Correct Incorrect
0 to 1 AB
Flat head
watchmakers screw driver
Switch spacer
Switch mounting screw
(M2.5 x 4 l)
Accessory
When mounting an auto switch, first hold the switch spacer between your
fingers and press it into the groove. Then confirm that it is seated in the
proper mounting position, and correct if necessary. Next insert the auto
switch into the groove and slide it under the switch spacer.
After setting in the desired mounting position, tighten the switch mounting
screw, which is included, using a flat head watchmakers screw driver.
Auto switch models
Note) When tightening the auto switch
mounting screw use a watchmakers
screw driver with a handle about 5 to
6mm in diameter. Also tighten with a
torque of about 0.05 to 0.1N⋅m. As a
rule, it should be turned about 90°past
the point at which tightening can be
felt. (1N·m = 0.7375ft·lb)
1in = 25.4mm

9
®
Non-rotating Double Power Cylinder Series MGZ
D-Z76
D-Z73 D-Z80
D-Y59A, Y69A
D-Y59B, Y69B
D-Y7P (V)
D-Y7NW (V)
D-Y7BW (V)
D-Y7PW (V)
D-Y7BAL
Indicator light
Optimum operating position
Operating
range OFF
ON
Red
Indication
Green Red
Reed Switch Internal Circuits
Solid State Switch Internal Circuit
Contact Protection Boxes/CD-P11, CD-P12
Contact protection box dimensions
Contact Protection Box Connection
4.4
38
46
ø3.4
18
9
3.4
CD-P
VOLT
SWITCH
15.5
Contact protection box internal circuits
Lead wire colors inside ( ) are those prior to conformity with IEC standards.
Part No.
Load voltage
Max. load current
∗ Lead wire length ......... Switch connection side 0.5m
Load connection side 0.5m
Surge
absorber
Choke
coil
OUT
Brown [Red]
OUT
Blue [Black]
Choke
coil
Zener
diode
CD-P11 CD-P12
CD-P11 CD-P12
24VDC
50mA
200VAC
12.5mA
100VAC or less
25mA
Contact protection box specifications
OUT (+)
Brown [Red]
OUT (–)
Blue [Black]
LED
Reed switch
Resistor
Zener diode
Contact
protection
box
CD-P11
CD-P12
Brown (Red)
Blue (Black)
OUT (+)
Brown (Red)
OUT (–)
Blue (Black)
LED
Reed switch
Resistor
Reverse
current
prevention
diode
OUT
Black (White)
DC (+)
Brown (Red)
DC (–)
Blue (Black)
Load
(+)
(–)
DC
power
Reed switch
Contact
protection
box
CD-P11
CD-P12
OUT (±)
Brown (Red)
OUT ( )
Blue (Black)
±
OUT (+)
Brown (Red)
OUT (–)
Blue (Black)
OUT
Black (White)
DC (+)
Brown (Red)
DC (–)
Blue (Black)
DC (+)
Brown (Red)
OUT
Black (White)
DC (–)
Blue (Black)
OUT (+)
Brown (Red)
OUT (–)
Blue (Black)
OUT
Black (White)
DC (+)
Brown (Red)
DC (–)
Blue (Black)
DC (+)
Brown (Red)
DC (–)
Blue (Black)
OUT
Black (White)
OUT (+)
Brown (Red)
OUT (–)
Blue (Black)
Main
switch circuit
<Applicable auto switches>
D-Z7, Z8
Auto switches shown above do not have internal contact protection circuits.
1. The operated load is an induction load.
2. The length of wiring to the load is 5m or more.
3. The load voltage is 100VAC.
A contact protection box should be used in any of the above cases.
To connect a switch unit to a contact protection box, connect the lead wires
from the side of the contact protection box marked SWITCH to the lead
wires coming out of the switch unit. Further, the switch unit should be kept
as close as possible to the contact protection box, with a lead wire length of
no more than 1 meter.
Main
switch circuit
Main
switch circuit
Main
switch circuit Main
switch circuit Main
switch circuit
Main
switch circuit

10
®
Series MGZ Non-rotating Double Power Cylinder
Selection Graphs to (Vertical Upward Mounting)
Selection graph to 300mm/s Selection graph to 500mm/s
Selection graph to 700mm/s Selection Example:
Vertical Upward Mounting
1. Confirmation of allowable load weight by application
Caution Theoretical output must be confirmed separately. Refer to the theoretical output table on page 5.
Vertical upward: Lifter
Maximum speed mm/s (in/s)
to 300 (11.8) to 500 (19.7) to 700 (27.6) to 300 (11.8) to 500 (19.7) to 100 (3.9) to 200 (7.9) to 300 (11.8)
Graph
∗ l: The dimension for the load center of gravity position is that when the cylinder is retracted.
Graph Graph Graph Graph Graph Graph Graph
Maximum speed mm/s (in/s) Load center of gravity position l mm (in)
Vertical downward: Press Horizontal: Chucking
L
m
m
F
m
l
F
Continuous line: Operating pressure 0.4MPa or more
Dotted line: Operating pressure 0.5MPa or more
Continuous line:
Operating pressure 0.4MPa or more
Continuous line: Operating pressure 0.4MPa or more
Dotted line: Operating pressure 0.5MPa or more
300
100
50
10
510 30 50 70 100 200 300
ø63
ø50
ø40
Eccentric distance L (mm)
Load weight m (kg)
100
50
10
5
110 30 50 70 100 200 300
ø63
ø50
ø40
Eccentric distance L (mm)
Load weight m (kg)
200
100
50
10
2
5
10 30 50 70 100 200 300
ø63
ø50
ø40
Eccentric distance L (mm)
Load weight m (kg)
[example q]
Selection conditions Mounting: Vertical upward (lifter)
Maximum speed: 500mm/s
Load weight: 40kg
Eccentric distance: 80mm
Determine the selection conditions in order from the top of the table below,
and choose one of the selection graphs to be used.
Selection Conditions:
Refer to graph based on vertical mounting and speed of 500mm/s.
Find the intersection of load weight 40kg and eccentric distance
80mm in graph , and determine bore size ø63.
Note: 1kg = 2.2046lb
1in = 25.4mm
1MPa = 145psi

11
®
Non-rotating Double Power Cylinder Series MGZ
Selection Graphs (Vertical Downward Mounting)
Selection Example:
Horizontal Mounting
Selection Graphs to (Horizontal Mounting)
2. Confirmation of allowable rotary torque
3. Confirmation of non-rotating accuracy
Graph to 300mm/s Graph to 500mm/s
Graph l: 100mm or less Graph l: 101 to 200mm Graph l: 201 to 300mm
Bore size (mm)
Allowable rotary torque Non-rotating accuracy Deflection angle for eccentric load
3-1 Rolling direction 3-2 Pitching direction
40
50
63
Non-rotating accuracy (±θ°)
± 0.3°or less
Bore size (mm)
40
50
63
Non-rotating accuracy (± θ°)
± 0.12°or less
Bore size (mm)
40
50
63
Allowable rotary torque T (N⋅m)
7
15
20
+θ°
–θ°
+θ°
+θ°
–θ°
–θ°
Selection conditions
Mounting: Horizontal (chucking)
Stroke: 300mm
Load center of gravity position: 100mm
Load weight: 10kg
Operating pressure: 0.5MPa
Refer to graph based on horizontal
mounting and load center of gravity position.
Find the intersection of load weight 10kg
and stroke 300mm in graph , and
determine bore size ø50.
The theoretical output for extension is
1924N, from the theoretical output table on
page 5.
20
40
60
80
100
120
0
ø63
ø50
ø40
Operating pressure P (MPa)
Load weight m (kg)
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
5
10
20
50
80
1
ø63
ø50
ø40
Stroke (mm)
Load weight m (kg)
70 100 300 500 1000
5
10
20
50
1
ø63
ø50
ø40
Stroke (mm)
Load weight m (kg)
70 100 300 500 1000
5
10
20
40
1
ø63
ø50
ø40
Stroke (mm)
Load weight m (kg)
70 100 300 500 1000
ø63
ø50
ø40
Operating pressure P (MPa)
Load weight m (kg)
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
70
60
50
40
30
20
10
80
0
[Example ]
T
Note: 1kg = 2.2046lb
1in = 25.4mm
1MPa = 145psi

12
®
Series MGZ Non-rotating Double Power Cylinder
Note 1) ISO 4414: Pneumatic fluid power -- Recommendations for the application of equipment to transmission and control
systems
Note 2) JIS B 8370: General Rules for Pneumatic Equipment
Warning
Caution : Operator error could result in injury or equipment damage.
Warning : Operator error could result in serious injury or loss of life.
Danger : In extreme conditions, there is a possible result of serious injury or loss of life.
These safety instructions are intended to prevent a hazardous situation and/or
equipment damage. These instructions indicate the level of potential hazard by a
label of "Caution", "Warning" or "Danger". To ensure safety, be sure to
observe ISO 4414
Note 1),JIS B 8370 Note 2) and other safety practices.
1. The compatibility of pneumatic equipment is the responsibility of the person
who designs the pneumatic system or decides its specifications.
Since the products specified here are used in various operating conditions, their compatibility for the
specific pneumatic system must be based on specifications or after analysis and/or tests to meet your
specific requirements.
2. Only trained personnel should operate pneumatically operated machinery and
equipment.
Compressed air can be dangerous if an operator is unfamiliar with it. Assembly, handling or repair of
pneumatic systems should be performed by trained and experienced operators.
3. Do not service machinery/equipment or attempt to remove components until
safety is confirmed.
1. Inspection and maintenance of machinery/equipment should only be performed after confirmation of
safe locked-out control positions.
2. When equipment is to be removed, confirm the safety process as mentioned above. Cut the supply
pressure for this equipment and exhaust all residual compressed air in the system.
3. Before machinery/equipment is restarted, take measures to prevent shooting-out of cylinder piston rod,
etc. (Bleed air into the system gradually to create back pressure.)
4. Contact SMC if the product is to be used in any of the following conditions:
1. Conditions and environments beyond the given specifications, or if product is used outdoors.
2. Installation on equipment in conjunction with atomic energy, railway, air navigation, vehicles, medical
equipment, food and beverages, recreation equipment, emergency stop circuits, press applications, or
safety equipment.
3. An application which has the possibility of having negative effects on people, property, or animals,
requiring special safety analysis.
Safety Instructions

13
®
Actuator Precautions 1 Series MGZ
1. Confirm the specifications.
The products advertised in this catalog are designed according to
use in industrial compressed air systems. If the products are used in
conditions where pressure, temperature, etc., are out of specifica-
tion, damage and/or malfunction may be caused. Do not use in
these conditions. (Refer to specifications.)
Consult SMC if you use a fluid other than compressed air.
2. Intermediate stops
When intermediate stopping of a cylinder piston is performed with a
3 position closed center type directional control valve, it is difficult to
achieve stopping positions as accurate and minute as with hydraulic
pressure due to the compressibility of air.
Furthermore, since valves and cylinders, etc., are not guaranteed for
zero air leakage, it may not be possible to hold a stopped position
for an extended period of time. Contact SMC in case it is necessary
to hold a stopped position for an extended period.
1. Operate within the limits of the maximum
usable stroke.
The piston rod will be damaged if operated beyond the maximum
stroke. Refer to the air cylinder model selection procedure for the
maximum useable stroke.
2. Operate the piston within a range such that
collision damage will not occur at the stroke
end.
Operate within a range such that damage will not occur when the
piston having inertial force stops by striking the cover at the stroke
end. Refer to the cylinder model selection procedure for the range
within which damage will not occur.
3. Use a speed controller to adjust the cylinder
drive speed, gradually increasing from a low
speed to the desired speed setting.
4. Provide intermediate supports for long stroke
cylinders.
Provide intermediate supports for cylinders with long strokes to pre-
vent rod damage due to sagging of the rod, deflection of the tube,
vibration and external loads, etc.
Precautions on Design Selection
Warning Warning
Caution
1. There is a danger of sudden action by air
cylinders if sliding parts of machinery are
twisted, etc. and, changes in forces occur.
In such cases, human injury may occur; e.g., by catching hands or
feet in the machinery, or damage to the machinery itself may occur.
Therefore, the machine should be designed to avoid such dangers.
2. Install a protective cover when there is a risk
of human injury.
If a driven object and moving parts of a cylinder pose a danger of
human injury, design the structure to avoid contact with the human
body.
3. Securely tighten all stationary parts and
connected parts so that they will not
become loose.
Especially when a cylinder operates with high frequency or is
installed where there is a lot of vibration, ensure that all parts
remain secure.
4. A deceleration circuit or shock absorber,
etc., may be required.
When a driven object is operated at high speed or the load is
heavy, a cylinder’s cushion will not be sufficient to absorb the
impact. Install a deceleration circuit to reduce the speed before
cushioning, or install an external shock absorber to relieve the
impact. In this case, the rigidity of the machinery should also be
examined.
5. Consider a possible drop in operating pres-
sure due to a power outage, etc.
When a cylinder is used in a clamping mechanism, there is a dan-
ger of work pieces dropping if there is a decrease in clamping
force due to a drop in circuit pressure caused by a power outage,
etc. Therefore, safety equipment should be installed to prevent
damage to machinery and/or human injury. Suspension mecha-
nisms and lifting devices also require consideration for drop pre-
vention.
6. Consider a possible loss of power source.
Measures should be taken to protect against human injury and
equipment damage in the event that there is a loss of power to
equipment controlled by air pressure, electricity or hydraulics, etc.
7. Design circuitry to prevent sudden lurching
of driven objects.
When a cylinder is driven by an exhaust center type directional
control valve or when starting up after residual pressure is
exhausted from the circuit, etc., the piston and its driven object will
lurch at high speed if pressure is applied to one side of the cylin-
der because of the absence of air pressure inside the cylinder.
Therefore, equipment should be selected and circuits designed to
prevent sudden lurching because, there is a danger of human
injury and/or damage to equipment when this occurs.
8. Consider emergency stops.
Design so that human injury and/or damage to machinery and
equipment will not be caused when machinery is stopped by a
safety device under abnormal conditions, a power outage or a
manual emergency stop.
9. Consider the action when operation is
restarted after an emergency stop or abnor-
mal stop.
Design the machinery so that human injury or equipment damage
will not occur upon restart of operation. When the cylinder has to
be reset at the starting position, install safe manual control equip-
ment.
Be sure to read before handling.

14
®
Series MGZ
1. Be certain to align the rod shaft center with
the load and direction of movement when
connecting.
When not properly aligned, the rod and tube may be twisted, and
damage may be caused due to wear on areas such as the inner
tube surface, bushings, rod surface and seals.
2. When an external guide is used, connect the
rod end and the load in such a way that there
is no interference at any point within the
stroke.
3. Do not scratch or gouge the sliding parts of
the cylinder tube or piston rod, etc., by strik-
ing or grasping them with other objects.
Cylinder bores are manufactured to precise tolerances, so that
even a slight deformation may cause malfunction. Also, scratches
or gouges, etc., in the piston rod may lead to damaged seals and
cause air leakage.
4. Prevent the seizure of rotating parts.
Prevent the seizure of rotating parts (pins, etc.) by applying grease.
5. Do not use until you can verify that equipment
can operate properly.
Verify correct mounting by suitable function and leakage inspec-
tions after compressed air and power are connected following
mounting, maintenance or conversions.
6. Instruction manual
The product should be mounted and operated after thoroughly
reading the manual and understanding its contents.
Keep the instruction manual where it can be referred to as need-
ed.
1. Preparation before piping
Before piping is connected, it should be thoroughly blown out with
air (flushing) or washed to remove chips, cutting oil and other
debris from inside the pipe.
2. Wrapping of pipe tape
When screwing together pipes and fittings, etc., be certain that
chips from the pipe threads and sealing material do not get inside
the piping.
Also, when pipe tape is used, leave 1.5 to 2 thread ridges
exposed at the end of the threads.
Lubrication
1. Lubrication of non-lube type cylinder
The cylinder is lubricated at the factory and can be used without
any further lubrication.
However, in the event that it will be lubricated, use class 1 turbine
oil (without additives) ISO VG32.
Stopping lubrication later may lead to malfunction due to the loss
of the original lubricant. Therefore, lubrication must be continued
once it has been started.
Caution
Caution
Mounting
Wrapping direction
Pipe tape
Expose Approx. 2 threads
1. Use clean air.
Do not use compressed air which includes chemicals, synthetic
oils containing organic solvents, salt or corrosive gases, etc., as it
can cause damage or malfunction.
1. Install air filters.
Install air filters at the upstream side of valves. The filtration
degree should be 5µm or finer.
2. Install an after cooler, air dryer or Drain
Catch, etc.
Air that includes excessive drainage may cause malfunction of
valves and other pneumatic equipment. To prevent this, install an
after cooler, air dryer or Drain Catch, etc.
3. Use the product within the specified range
of fluid and ambient temperature.
Take measures to prevent freezing, since moisture in circuits can
be frozen under 5°C, and this may cause damage to seals and
lead to malfunction.
Refer to SMC’s “Air Cleaning Equipment”catalog for further
details on compressed air quality.
Warning
Air Supply
Caution
Caution
Piping
Actuator Precautions 2
Be sure to read before handling.

15
®
Actuator Precautions 3 Series MGZ
1. Do not use in environments where there is a
danger of corrosion.
Refer to the construction drawings regarding cylinder materials.
2. In dusty locations or where water, oil, etc.,
splash on the equipment, take suitable mea-
sures to protect the rod.
3. When using auto switches, do not operate in
an environment with strong magnetic fields.
Operating Environment
Warning
Maintenance
Warning
1. Maintenance should be performed accord-
ing to the procedure indicated in the
instruction manual.
If handled improperly, malfunction and damage of machinery or
equipment may occur.
2. Removal of equipment, and supply/exhaust
of compressed air.
When equipment is removed, first check measures to prevent
dropping of driven objects and run-away of equipment, etc. Then
cut off the supply pressure and electric power, and exhaust all
compressed air from the system.
When machinery is restarted, proceed with caution after confirm-
ing measures to prevent cylinder lurching.
1. Drain flushing
Remove drainage from air filters regularly.
(Refer to specifications.)
Caution
Be sure to read before handling.

16
®
Series MGZ Auto Switch Precautions 1
1. Confirm the specifications.
Read the specifications carefully and use this product appropri-
ately. The product may be damaged or malfunction if it is used
outside the range of specifications of current load, voltage, tem-
perature or impact.
2. Take precautions when multiple cylinders
are used close together.
When multiple auto switch cylinders are used in close proximity,
magnetic field interference may cause the switches to malfunc-
tion. Maintain a minimum cylinder separation of 40mm. (When the
allowable separation is indicated for each cylinder series, use the
specified value.)
3. Pay attention to the length of time that a
switch is ON at an intermediate stroke posi-
tion.
When an auto switch is placed at an intermediate position of the
stroke and a load is driven at the time the piston passes, the auto
switch will operate, but if the speed is too great the operating time
will be shortened and the load may not operate properly. The max-
imum detectable piston speed is:
V(mm/s) = x 1000
4. Keep wiring as short as possible.
<Reed switch>
As the length of the wiring to a load gets longer, the rush current
at switching ON becomes greater, and this may shorten the prod-
uct’s life. (The switch will stay ON all the time.)
1) For an auto switch without a contact protection circuit, use a con-
tact protection box when the wire length is 5m or longer.
2) Even if an auto switch has a built-in contact protection circuit,
when the wiring is more than 30m long, it is not able to adequately
absorb the rush current and its life may be reduced. It is again
necessary to connect a contact protection box in order to extend
its life. Please contact SMC in this case.
<Solid state switch>
3) Although wire length should not affect switch function, use wiring
100m or shorter.
5. Take precautions for the internal voltage
drop of the switch.
<Reed switch>
1) Switches with an indicator light (Except D-Z76)
•If auto switches are connected in series as shown below, take
note that there will be a large voltage drop because of internal
resistance in the light emitting diodes. (Refer to internal volt-
age drop in the auto switch specifications.)
[The voltage drop will be “n”times larger when “n”auto switch-
es are connected.]
Even though an auto switch operates normally, the load may
not operate.
Design & Selection
Warning
Warning
Auto switch operating range (mm)
____________________________
Time load applied (ms)
•In the same way, when operating under a specified voltage,
although an auto switch may operate normally, the load may
not operate. Therefore, the formula below should be satisfied
after confirming the minimum operating voltage of the load.
2) If the internal resistance of a light emitting diode causes a prob-
lem, select a switch without an indicator light (Model D-Z80).
<Solid state switch>
3) Generally, the internal voltage drop will be greater with a 2 wire
solid state auto switch than with a reed switch. Take the same pre-
cautions as in 1).
Also, note that a 12VDC relay is not applicable.
6. Pay attention to leakage current.
<Solid state switch>
With a 2 wire solid state auto switch, current (leakage current)
flows to the load to operate the internal circuit even when in the
OFF state.
If the criteria given in the above formula are not met, it will not
reset correctly (stays ON). Use a 3 wire switch if this specification
will not be satisfied.
Moreover, leakage current flow to the load will be “n”times larger
when “n”auto switches are connected in parallel.
7. Do not use a load that generates surge volt-
age.
<Reed switch>
If driving a load such as a relay that generates a surge voltage,
use a switch with a built-in contact protection circuit or use a con-
tact protection box.
<Solid state switch>
Although a zener diode for surge protection is connected at the
output side of a solid state auto switch, damage may still occur if
the surge is applied repeatedly. When a load, such as a relay or
solenoid valve, which generates surge is directly driven, use a
type of switch with a built-in surge absorbing element.
8. Cautions for use in an interlock circuit
When an auto switch is used for an interlock signal requiring high
reliability, devise a double interlock system to avoid trouble by pro-
viding a mechanical protection function, or by also using another
switch (sensor) together with the auto switch. Also perform peri-
odic maintenance and confirm proper operation.
9. Ensure sufficient clearance for maintenance
activities.
When designing an application, be sure to allow sufficient clear-
ance for maintenance and inspections.
Load
Supply
voltage
Internal voltage
drop of switch
Minimum operating
voltage of load
–>
Operating current of load (OFF condition) >Leakage current
Be sure to read before handling.

17
®
Auto Switch Precautions 2 Series MGZ
5. Do not allow short circuit of loads.
<Reed switch>
If the power is turned ON with a load in a short circuit condition,
the switch will be instantly damaged because of excess current
flow into the switch.
<Solid state switch>
Model J51 and all models of PNP output type switches do not
have built-in short circuit protection circuits. If loads are short cir-
cuited, the switches will be instantly damaged, as in the case of
reed switches.
Take special care to avoid reverse wiring with the brown (red)
power supply line and the black (white) output line on 3 wire type
switches.
6. Avoid incorrect wiring.
<Reed switch>
A 24VDC switch with indicator light has polarity. The brown (red)
lead wire or terminal no. 1 is (+), and the blue (black) lead wire or
terminal no. 2 is (–).
1) If connections are reversed, a switch will operate, however, the
light emitting diode will not light up.
Also note that a current greater than that specified will damage a
light emitting diode and it will no longer operate.
Applicable models: D-Z73
2) However, in the case of a 2 color indicator type auto switch (D-
A59W), note that the switch will be in a normally ON condition if
connections are reversed.
<Solid state switch>
1) If connections are reversed on a 2 wire type switch, the switch will
not be damaged if protected by a protection circuit, but the switch
will be in a normally ON state. However, note that the switch will
be damaged if reversed connections are made while the load is in
a short circuited condition.
2) If connections are reversed (power supply line + and power sup-
ply line –) on a 3 wire type switch, the switch will be protected by
a protection circuit. However, if the power supply line (+) is con-
nected to the blue (black) wire and the power supply line (–) is
connected to the black (white) wire, the switch will be damaged.
1. Do not drop or bump.
Do not drop, bump or apply excessive impacts (300m/s²or more
for reed switches and 1000m/s²or more for solid state switches)
while handling.
Although the body of the switch may not be damaged, the inside
of the switch could be damaged and cause a malfunction.
2. Do not carry a cylinder by the auto switch
lead wires.
Never carry a cylinder by its lead wires. This may not only cause
broken lead wires, but it may cause internal elements of the
switch to be damaged by the stress.
3. Mount switches using the proper tightening
torque.
When a switch is tightened beyond the range of tightening torque,
the mounting screws, mounting bracket or switch may be dam-
aged. On the other hand, tightening below the range of tightening
torque may allow the switch to slip out of position. (Refer to page
5 regarding switch mounting, moving, and tightening torque, etc.)
4. Mount a switch at the center of the operating
range.
Adjust the mounting position of an auto switch so that the piston
stops at the center of the operating range (the range in which a
switch is ON). (The mounting positions shown in the catalog indi-
cate the optimum positions at stroke end.) If mounted at the end
of the operating range (around the borderline of ON and OFF),
operation may be unstable.
Mounting & Adjustment Wiring
Wiring
Warning
1. Avoid repeatedly bending or stretching lead
wires.
Broken lead wires will result from repeatedly applying bending
stress or stretching force to the lead wires.
2. Be sure to connect the load before power is
applied.
<2 wire type>
If the power is turned ON when an auto switch is not connected to
a load, the switch will be instantly damaged because of excess
current.
3. Confirm proper insulation of wiring.
Be certain that there is no faulty wiring insulation (contact with
other circuits, ground fault, improper insulation between terminals,
etc.). Damage may occur due to excess current flow into a switch.
4. Do not wire with power lines or high voltage
lines.
Wire separately from power lines or high voltage lines, avoiding
parallel wiring or wiring in the same conduit with these lines.
Control circuits containing auto switches may malfunction due to
noise from these other lines.
Warning
∗Lead wire color changes
Old
Red
Black
New
Brown
Blue
Output (+)
Output (–)
2 wire
Old
Red
Black
White
New
Brown
Blue
Black
Power supply
GND
Output
3 wire
Old
Red
Black
White
Yellow
New
Brown
Blue
Black
Orange
Power supply
GND
Output
Diagnostic output
Solid state
with diagnostic output
Old
Red
Black
White
Yellow
New
Brown
Blue
Black
Orange
Power supply
GND
Output
Latch type
diagnostic output
Solid state with latch
type diagnostic output
Lead wire colors of SMC switches and related products have been
changed in order to meet NECA (Nippon Electric Control Equip-
ment Industries Association) Standard 0402 for production begin-
ning September, 1996 and thereafter. Please refer to the tables
provided.
Special care should be taken regarding wire polarity during the
time that the old colors still coexist with the new colors.
Warning
Be sure to read before handling.

18
®
Series MGZ Auto Switch Precautions 3
1. Never use in an atmosphere of explosive
gases.
The structure of auto switches is not intended to prevent explo-
sion. Never use in an atmosphere with an explosive gas since this
may cause a serious explosion.
2. Do not use in an area where a magnetic field
is generated.
Auto switches will malfunction or magnets inside cylinders will
become demagnetized. (Consult SMC regarding the availability of
a magnetic field resistant auto switch.)
3. Do not use in an environment where the
auto switch will be continually exposed to
water.
Although switches satisfy IEC standard IP67 construction (JIS C
0920: watertight construction), do not use switches in applications
where continually exposed to water splash or spray. Poor insula-
tion or swelling of the potting resin inside switches may cause
malfunction.
4. Do not use in an environment with oil or
chemicals.
Consult SMC if auto switches will be used in an environment with
coolant, cleaning solvent, various oils or chemicals. If auto switch-
es are used under these conditions for even a short time, they
may be adversely affected by improper insulation, malfunction
due to swelling of the potting resin, or hardening of the lead wires.
5. Do not use in an environment with tempera-
ture cycles.
Consult SMC if switches are used where there are temperature
cycles other than normal temperature changes, as they may be
adversely affected.
6. Do not use in an environment where there is
excessive impact shock.
<Reed switch>
When excessive impact (300m/s2 or more) is applied to a reed
switch during operation, the contact will malfunction and generate
or cut off a signal momentarily (1ms or less). Consult SMC regard-
ing the need to use a solid state switch depending upon the envi-
ronment.
7. Do not use in an area where surges are gen-
erated.
<Solid state switch>
When there are units (solenoid type lifter, high frequency induc-
tion furnace, motor, etc.) which generate a large amount of surge
in the area around cylinders with solid state auto switches, this
may cause deterioration or damage to internal circuit elements of
the switch. Avoid sources of surge generation and disorganized
lines.
8. Avoid accumulation of iron debris or close
contact with magnetic substances.
When a large amount of ferrous debris such as machining chips
or welding spatter is accumulated, or a magnetic substance
(something attracted by a magnet) is brought into close proximity
with an auto switch cylinder, it may cause auto switches to mal-
function due to a loss of the magnetic force inside the cylinder.
Operating Environment Maintenance
Warning
Warning
1. Perform the following maintenance periodi-
cally in order to prevent possible danger due
to unexpected auto switch malfunction.
1) Securely tighten switch mounting screws.
If screws become loose or the mounting position is dislocated,
retighten them after readjusting the mounting position.
2) Confirm that there is no damage to lead wires.
To prevent faulty insulation, replace switches or repair lead wires,
etc., if damage is discovered.
3) Confirm the lighting of the green light on a 2 color indicator type
switch.
Confirm that the green LED is on when stopped at the established
position. If the red LED is on, the mounting position is not appro-
priate. Readjust the mounting position until the green LED lights
up.
Other
Warning
1. Consult SMC concerning water resistance,
elasticity of lead wires and usage at welding
sites, etc.
Be sure to read before handling.

19
®
Specific Product Precautions Series MGZ
1. Do not apply more than the allowable rotary
torque to the piston rod.
If more than the allowable rotary torque is applied, the slide
keys for non-rotation will be deformed and non-rotating accura-
cy will be lost. This may cause damage to machinery.
1. When mounting a cylinder, use mounting
screws of a suitable length, and tighten them
properly within the prescribed range of tight-
ening torque.
Particularly in cases of high operation frequency, or operation
of a cylinder where there is a lot of vibration, employ measures
to prevent loosening, such as the application of a thread locker.
2. Do not gouge or scratch the mounting surfa-
ces of the rod cover and head cover.
Parallelism of the mounting surfaces will be degraded, causing
increased operating resistance and wear of the bearings, etc.
3. Mounting of work piece on rod end
When screwing bolts into the threads of the table surface at the
end of the piston rod, be sure the piston rod is fully retracted
and use the wrench flats to hold the rod.
Furthermore, tighten the bolts in such a way that the tightening
torque is not applied to the non-rotation slide keys.
Mounting
Caution
Selection
1. Operate loads within the range of the operat-
ing limits.
In accordance with the model selection method, operate within
the operating limits for load weight, maximum speed, center of
gravity position and rotary torque. Operation beyond the operat-
ing limits can cause wear of the bearings and loosening of con-
nections, etc., leading to damage of machinery.
2. Construct equipment so that reactive forces
such as external stopper and press forces
are applied to a cylinder's central axis.
When a cylinder stops before the stroke end on a stopper or
press, etc., design the external stopper or die so that the reac-
tive force is applied to the cylinder's central axis. Off center
operation can cause wear of the bearings and loosening of con-
nections, etc., leading to damage of machinery.
3. Under horizontal or downward operating con-
ditions, lurch prevention measures may be
required for the cylinder's extending opera-
tion.
Because the output force of this cylinder in the extending direc-
tion is at least double that in the retracting direction, start-up
operation for extension may exceed the control speed of the
speed controller. In this case, provide a lurch prevention circuit
within the pneumatic circuitry.
4. Do not over throttle the meter-in speed con-
troller of the lurch prevention circuit.
The start-up time for output in the extending direction will be
lengthened by throttling the meter-in speed controller.
Operating Precautions
Model Screws Proper tightening
torque N⋅m L1
MGZ40
MGZ50
MGZ63
M6 x 1.0
M8 x 1.25
M8 x 1.25
4.1 to 6.4
8.8 to 13.8
8.8 to 13.8
12
15
15
L2
16
16
16
L1
L2
CautionCaution
Correct Incorrect
Be sure to read before handling.
Refer to pages 12-18 for safety instructions, actuator precautions and auto switch precautions.

© 1978-2000 SMC Pneumatics, Inc. All Rights Reserved.
April 2000
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