SMC Networks M Series User manual

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Doc No. KF∗-OMV0045-A
Miniature Fitting
PRODUCT NAME
M Series
MODEL / Series / Product Number

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Contents
1. Safety Instructions 3-4
2. Specific Product Precautions 5-10
3. Specifications 11-12
4. Troubleshooting 12
5. Construction 13-14
6. Spare Parts 14
7. Made to Order 14

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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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Safety Instructions
Caution
1. 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.

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2. Specific Product Precautions
Warning
(1) Confirm the specifications.
Products presented in this manual are
designed only for use in compressed air
systems (including vacuum).
Do not operate at pressures, temperatures,
etc., beyond the range of specifications, as
this can cause damage or malfunction. (Refer
to the specifications.)
Please contact SMC when using a fluid other
than compressed air (including vacuum).
We do not guarantee against any damage if
the product is used outside of the specification
range.
(2) Do not disassemble the product or make
any modifications, including additional
machining.
It may cause human injury and/or an accident.
(3) Check if PTFE can be used in application.
PTFE powder (Polytetrafluoroethylene resin)
is included in the sealant. Confirm that the use
of it will not cause any adverse affect on the
system.
Caution
(1) Keep the connection part of fittings and
tubing from rotating or oscillating
movement. Use Rotary One-touch Fittings
(KS or KX Series) in these cases.
The fittings may be damaged if they are used in
the above manner.
(2) The tubing bending radius in the vicinity of
the fitting should be at least the minimum
bending radius of the tubing.
If the bending radius is less than the minimum
value, fittings may damage, or tubing may
crack or be crushed. The minimum bending
radius of the FR soft nylon tubing (TRS series),
FR double layer tubing (TRB series), antistatic
soft nylon tubing (TAS series), polyolefin tubing
(TPH series), soft polyolefin tubing (TPS series)
is measured as following in accordance with
JIS B8381. Tubing deformation ratio at the
minimum bending radius is obtained through
the following formula, based on tubing diameter
and mandrel diameter by winding the same
radius mandrel tube.
Here, η: Deformation ratio (%)
d: Tubing diameter (mm)
L: Measured length (mm)
D: Mandrel diameter (mm)
(Twice against the minimum
bending radius)
Test temperature: 20±5
o
C
Relative humidity: 65±5 (%)
(3) Do not use fluids other than listed on the
specifications.
Applicable fluids are air, N2 and water. Please
consult with SMC if using other fluids.
(4) When it is used with water, the fittings or
tubing may be damaged depending on the
surge pressure.
Warning
(1) Operation Manual
Install the products and operate them only after
reading the operation manual carefully and
understanding its contents. Also, keep the
manual where it can be referred to as necessary.
(2) Maintenance space
Allow sufficient space for maintenance and
inspection.
(3) Adhere to the thread tightening method.
Refer to "Connection Thread Tightening Method"
when mounting the product.
(4) There may be cases of the tubing detaching
from the fitting and thrashing around
uncontrollably due to tubing degradation or
fitting breakage.
To prevent the situation from becoming
uncontrollable, fit the tubing with a protective
cover or fix it in place.
Caution
(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) Winding of sealant tape
When screwing together pipes and fittings, etc.,
be certain that chips from the pipe threads and
sealant do not get inside the pipe. Also, when the
sealant tape is used, leave approx. 1 thread ridge
exposed at the end of the threads.
(3) Check the model, type and size before
installation.
Also, confirm that there are no scratches,
gouges or cracks on the product.
Design/Selection Design/Selection
Mounting/ Piping
100
2d
D-L
1
η
×





−=
Mandrel
Tube deformation ratio at the
minimum bending radius

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6
Caution
(4) When connecting the tubing, take pressure
or possible changes to the tubing length
into account, and allow a sufficient margin.
Failure to do so may result in fitting breakage or
detachment of the tubing. Refer to the
recommended piping conditions.
(5) Do not apply unnecessary forces such as
twisting, pulling, moment loads, vibration
and impact, etc. on fittings or tubing.
This will cause damage to the fittings and will
crush, burst or release tubing.
(6) Tubing, with the exception of coiled tubing,
requires stationary installation. Do not use
standard tubing (non-coiled) in applications
where tubing is required to travel inside the
flexible protection tube. Tubing that travels
may sustain abrasion, extension, or
severance due to tensile force, or may result
in removal of tubing from fitting. Use
caution prior to use for proper application.
(7) To install the fitting, screw the fitting into the
hexagonal face of the body, and tighten with
an appropriate wrench.
Affix the wrench at the base of the thread. If the
size of hexagonal face and wrench do not
match, or tightening takes place near the tube
side, it may cause collapse or deformation of
the hexagonal face, or damage to the
equipment. After installing, confirm that there is
no damage to the fitting, etc.
Warning
(1) Type of fluids
Please consult with SMC when using the
product in applications other than compressed
air. Regarding products for general fluids,
please contact SMC concerning applicable
fluids.
(2) When there is a large amount of drainage.
Compressed air containing a large amount of
drainage can cause malfunction of pneumatic
equipment. An air dryer or water separator
should be installed upstream from filters.
(3) Drain flushing
If condensation in the drain bowl is not emptied
on a regular basis, the bowl will overflow and
allow the condensation to enter the
compressed air lines. This causes the
malfunction of pneumatic equipment. If the
drain bowl is difficult to check and remove, the
installation of a drain bowl with an auto drain
option is recommended.
Refer to "SMC Air Preparation System" for
further details on compressed air quality.
(4) Use clean air.
Do not use compressed air that contains
chemicals, synthetic oils that include organic
solvents, salt, corrosive gases, etc., as they can
cause damage or malfunction.
Caution
(1) Install an air filter.
Install an air filter at the upstream side of valve.
Select an air filter with a filtration degree of 5μm
or finer.
(2) Install an aftercooler, air dryer or water
separator, etc.
Compressed air containing a large amount of
drainage can cause the malfunction of
pneumatic equipment. Therefore, take
appropriate measures to ensure air quality,
such as by providing an aftercooler, air dryer or
water separator.
(3) Ensure that the fluid and ambient
temperature are within the specified range.
If the fluid temperature is 5oC or less, the
moisture in the circuit could freeze, causing
damage to the seals and leading to
equipment malfunction. Therefore, take
appropriate measures to prevent freezing.
Refer to "SMC Air Preparation System" for
further details on compressed air quality.
Warning
(1) Do not use in an atmosphere where
corrosive gases, chemicals, sea water,
water or water steam is present.
Refer to each construction drawing on the
fittings and tubing material.
(2) Do not expose the product to direct sunlight
for an extended period of time.
(3) Do not use in a place subject to heavy
vibration and/or shock.
(4) Do not mount the product in locations
where it is exposed to radiant heat.
(5) Do not use the ordinary fittings and tubing
in locations where static electricity would be
problematic.
It may result in the system failure and trouble.
In such places, use of antistatic fittings (KA
series) and antistatic tubing (TA series) are
recommended.
(6) Do not use the ordinary fittings and tubing
in locations where spatter is generated.
Spattering may result in a fire hazard. In such a
place, use of flame resistant fittings (KR/KRM
series) and flame resistant tubing
(TRS/TRB/TRBU/TRTU series) are
recommended.
Air Supply
Operating Environment
Mounting/ Piping Air Supply

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Warning
(7) Do not use in an environment where the
product is directly exposed to cutting oil,
lubricant or coolant oil, etc.
Please contact SMC if using for an
environment exposed to cutting oil, lubricant or
coolant oil, etc.
(8) Take note that if nylon tubing and soft nylon
tubing are used in a clean room.
The antioxidant on the surface of the soft nylon
tubing may come off, thereby lowering the
cleanness level.
(9) Do not use in environments where foreign
matter may stick to the product or get mixed
in the product's interior.
This may cause leakage or disconnection of the
tubing.
Warning
(1) Perform maintenance inspection according
to the procedures indicated in the operation
manual.
If handled improperly, malfunction and damage
of machinery or equipment may occur.
(2) Maintenance work
If handled improperly, compressed air can be
dangerous. The assembly, handling, repair and
element replacement of pneumatic systems
should be performed by a knowledgeable and
experienced person.
(3) Drain flushing
Remove drainage from air filters regularly.
(4) Removal of equipment and supply/exhaust
of compressed air
When components are removed, first confirm
that measures are in place to prevent
workpieces from dropping, run-away equipment,
etc. Then, cut off the supply pressure and
electric power, and exhaust all compressed air
from the system using the residual pressure
release function. When the equipment is
restarted, proceed with caution after confirming
that appropriate measures are in place to
prevent cylinders from sudden movement.
Caution
(1) Be certain to wear safety glasses at all times
during periodical inspections.
(2) Replace fittings or tubing having the
following problems.
a) Cracks, gouges, wearing, corrosion
b) Air leakage
c) Twists or crushing of tubing
d) Hardening, deterioration, softening of tubing
(3) When replacing tubes or fittings, do not try
to mend or repair and then reuse them.
Caution
(1) Applicable tubing size - φ2
a) Connection of tubing
1. Cut the tube perpendicularly allowing
additional length. Use tube cutter TK-1, 2, 3,
5 or 6.
2. Insert the tubing into the sleeve.
3. Inserting the tubing slowly into the fittings.
Make sure to secure a gap of approx. 0.5 mm
between the tubing end and the barb end.
4. Insert the sleeve slowly.
Make sure not to allow any gap between the
sleeve end side and the body end side
(Please refer to the illustration below). If you
feel any strong resistance and cannot push
the sleeve completely to the end side, this
may be caused due to jamming. Remove and
repeat again by starting from step 1 making
sure to secure a gap in the step 3.
Note) When installing the tubing, the sleeve
must be attached. Operation without attaching
the sleeve may cause tubing disconnection.
Mounting/Piping of Miniature Fittings
Maintenance
Operating Environment
Piping
Tubing Connection and Removal

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8
Caution
b) Removal of tubing
1. Withdraw the sleeve straight along the tubing.
Use a tool such as long-nose pliers if it is
difficult to pull out by hand.
2. Withdraw the tubing straight.
3. When reuse the tubing, cut off the previously
installed portion of the tubing to avoid possible
leakage and/or disconnection of the tubing.
(2) Applicable tubing size - φ3.2, φ4, φ6
Use of Tube with Hose Nipple
a) Installation of tubing
1. Cut the tube perpendicularly to the tube axis
to a little longer than required length. Use
tube cutter TK-1, 2, 3, 5 or 6.
2. Pass the tube through the cap nut.
3. Push the tube until it comes to the end of the
hose nipple, or it may cause air leakage or
tube releasing.
4. Tighten the cap nut firmly by hand on the
fitting.
(3) Applicable tubing size - φ3.2, φ4, φ6
Use of Tube with Barb Fitting
a) Installation of tubing
1. Cut the tube perpendicularly to the tube axis
to a little longer than required length. Use an
SMC tube cutter TK-1, 2, 3, 5 or 6.
2. Push the tube until it comes to the end of the
barb portion, or it may cause air leakage or
tube releasing.
Caution
(1) Tightening of M3/M5 Threads
Tighten by hand, and give it an additional turn
with a wrench. Please check the number of
tightening revolutions using the table below.
If tightened excessively, thread portion may be
damaged and gasket may be deformed. This
will cause air leakage. On the contrary, if
tightened insufficiently, thread may loosen
causing air leakage.
Thread Model Number of tightening
rotations
M3
M-3AU-2 Approx. 1/6 rotations
M-3AU-□
(Except M-3AU-2)
Approx. 1/4 rotations
M-3N
M-3P
M-3ALU-2 Approx. 1/3 rotations
M-3ALU-□
(Except M-3ALU-2)
Approx. 1/2 rotations
M-3UL
M-3UT
M-5AU-□
Approx. 1/6 to 1/4
rotations
Note)
M-5AN-□
M-5H-□
M-5J
M-5N
M-5UN
M-5P
M-5ALU-□
Approx. 1/2 rotations
Note)
M-5ALN-□
M-5ALHU-□
M-5ALHN-□
M-5HL-□
M-5HLH-□
M-5UL
Note) As a guideline, the tightening torque should be
1 to 1.5 Nm.
Caution
Use a wrench appropriate for the hexagon flats
of the body to tighten the fitting.
Affix the wrench at the base of the thread. If the
size of hexagonal face and wrench do not
match, or tightening takes place near the tube
side, it may cause collapse or deformation of
the hexagonal face, or damage to the
equipment.
After installing, confirm that there is no damage
to the fitting, etc.
Connection Thread Tightening Method
Tightening tool
Install/ removal of tube

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9
Caution
Recommended No good
Recommended
No good No good
Caution
(1) Chamfer dimension for female thread of
the connection thread M3 and M5
Confirming to ISO 16030 (air pressure fluid
dynamics - connection - ports and stud ends),
the chamfer dimensions shown below are
recommended.
By chamfering as shown in the following table,
machining of threads is easier and effective
for burr prevention.
(1) When connecting piping to the fitting, use
pipe length with sufficient margin, in
accordance with the piping conditions
shown in Fig. 1.
Also, when using a tying band, etc., to bind
the piping together, make sure that external
force does not come to bear on the fitting (See
Fig.2).
取付ピッチ A
ストレート部
Fig.1 Recommended piping
Unit: mm
Recommended Piping Conditions
Chamfer Dimension for Female Thread
Connection
thread size
Chamfer
dimension øD
(Recommended
value)
[mm]
M3 3.1 to 3.4
M5 5.1 to 5.4
Tubing
size
Mounting pitch A Straight
line length
Nylon
tubing
Soft nylon
tubing
Polyurethane
tubing
φ2 - - 13 or more 10 or more
φ3.2 44 or more
35 or more 25 or more 16 or more
φ4 56 or more
44 or more 26 or more 20 or more
φ6 84 or more
66 or more 39 or more 30 or more
Tightening tool
Straight line
Mounting
pitch A

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10
Caution
Good
Recommended
No good
Fig. 2 When using a tying band to bind
the piping together
Caution
(1) When using a tubing other than from SMC, be
careful of the tolerance of the tubing O.D. and
tubing material.
a) Nylon tubing ±Within +/-0.1 mm
b) Soft nylon tubing ±Within +/-0.1 mm
c) Polyurethane tubing Within +0.15 mm,
Within -0.2 mm
Do not use the tubing which does not satisfy the
specified tubing O.D. accuracy, or if the tubing
has a different I.D., material, hardness, or
surface roughness from those of SMC's tubing.
Please consult with SMC if there is anything
unclear. It may cause difficulty in connecting the
tubing, leakage, disconnection of the tubing, or
fitting damage.
When used with tubing other than those from
SMC, due to their properties, the products listed
below are not subject to warranty.
ø2M
(2) When using fittings other than those from
SMC, be certain to confirm that operating
conditions are such that no problems will
arise.
Tubing
Design/Selection
Recommended Piping Conditions

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11
3. Specifications
(1) Applicable tubing size - φ2
Specification
Note 1) The surge pressure must be under the maximum operating pressure.
Note 2) Deionized water is not recommended for use as it may affect the material used in the fittings
In addition , it is known to degrade the water quality.
Note 3) Barb one-touch fitting is pre-greased. Do not use this product when N2 is used as clean dry
air.
Note 4) Apply the maximum operating pressure to the tubing during the tube connection.
Material of main parts
(2) Applicable tubing size - φ3.2, φ4, φ6
Specification
Applicable tubing Nylon Soft nylon Polyurethane
Super PFA
Note1)
FEP
Note2)
Modified
PTFE
Note3)
Applicable
tubing
O.D./I.D.
For M3 -
φ3.18/φ2.18
φ4/φ2.5
φ3.18/φ2
φ4/φ2.5 - - -
For M5, R1/8 φ4/φ2.5
φ6/φ4
φ4/φ2.5
φ6/φ4
φ3.18/φ2
φ4/φ2.5
φ6/φ4
φ6/φ4 φ4/φ2.5
φ6/φ4
φ4/φ2.5
φ6/φ4
Fluid
Air, N2 Note6),Water, Note 4) Note5)
Max. operating pressure
(at 20
o
C)
Note 7)
1.5 MPa
1 MPa 0.8 MPa 1 MPa 1.5 MPa 1.4 MPa
Ambient and fluid
temperature
-5 to 60oC (Water: 0 to 40oC) (No freezing)
Connection size M3, M5, R1/8 M5, R1/8
Note 1, 2, 3) Compatible only with hose nipple type.
Note 4) Barb fitting, barb elbow, barb elbow (H) are not compatible with water.
Note 5) Deionized water is not recommended for use as it may affect the material used in the fittings
In addition , it is known to degrade the water quality.
Note 6) Do not use the universal nipples when N2 is used as clean dry air because universal
nipples are pre-greased.
Note 7) The surge pressure must be under the maximum operating pressure.
Check the operating pressure range of the tubing.
Main materials
Material
Body Brass + Electroless nickel plating (Nipple M-3N, M-5N: Stainless steel 303)
Gasket Nylon 66; GF30%, Stainless steel 304; NBR (PVC for M3)
* Body of M-5E, M-5ER, M-5M is not surface-treated.
Electroless nickel plate treated is available as option -X2.
Material
Body Brass + Electroless nickel plating
Sleeve Brass + Electroless nickel plating
Gasket Stainless steel S304, NBR
Tubing material Polyurethane
Fluid Air, N2 Note3), water Note 1)
Note2)
Max. operating pressure Note 4) 1 MPa
Ambient and fluid temperature -5 to 60OC (No freezing)
Water: 0 to 40OC (No freezing)

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12
4. Troubleshooting
M series miniature fitting cannot be disassembled or repaired in order to quality maintenance.
When failure such as "Insufficient sealing" occurs, please replace the whole product.

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13
5. Construction
Applicable tubing size - φ2
Barb fitting
Applicable tubing size - φ4, φ6
Hose nipple
Part name Material
Sleeve Brass + Electroless nickel plating
Barb fitting Brass + Electroless nickel plating
Gasket NBR, Stainless steel 304
Part name Material
Body Brass + Electroless nickel plating
Cap nut Brass + Electroless nickel plating
Gasket NBR, Stainless steel 304

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14
Applicable tubing size - φ3.2, φ4, φ6
Barb fitting
6. Spare parts
Part name Part No. Applicable
thread Material Applicable model
Gasket
M-3G
M3
PVC M-3□-3, 4, 6
M-3G2 Stainless steel S304, NBR M-3□-2
M-5G1
M5
PVC -
M-5G2 Stainless steel S304, NBR M series
M-5G3 Stainless steel 316,
special FKM -
M-5GH Nylon 66, GF30% M-5AL□-6, M-5ALH□-6
M-5HL-4, 6, M-5HLH-4, 6
Cap nut
M-5-4-P01 - Brass
(Electroless nickel plating)
M-01H-4, M-5H-4
M-5HL-4, M-5HLH-4
M-5-6-P01 - Brass
(Electroless nickel plating)
M-01H-6, M-5H-6
M-5HL-6, M-5HLH-6
7. Made to Order
Please contact SMC for the detailed dimensions, specifications and lead times.
(1) Gasket material modification
Symbol Specifications
X83
Gasket material: Stainless steel 304, NBR
Applicable thread Gasket part No.
M3 Note 1) M-3G2
M5 Note 2) M-5G2
X226
Gasket material: Stainless steel 304, FKM
Applicable thread Gasket part No.
M3 M3G-DPH00489
X112
Gasket material: Stainless steel 316, special FKM
Applicable thread Gasket part No.
M5 M-5G3
Note 1) Compatible with models using M3 excluding M-3□-2.
Note 2) Compatible with only models using M-5GH.
Part name Material
Barb fitting. Brass + Electroless nickel plating
Gasket M3 PVC
M5 NBR, Stainless steel 304

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15
Revision history
B: - Fluid N
2
add
Specifications: Note 2,3,5,6) add
4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: [phone]
URL http://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
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