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Caution
(1) Connection and disconnection of tube from
one-touch fitting
①Insertion of tube
1) Cut the tube perpendicularly, being careful not
to damage the external surface. Use SMC's
tube cuter TK-1, 2 or 3 for cutting. Do not cut
the tube with pliers, nippers, scissors, etc.
This may flatten the tube and connection to the
fitting may fail, causing disconnection of the
tube and air leakage.
2) The outside diameter of polyurethane tubing
swells when internal pressure is applied, so it
may not be possible to re-insert used tubing into
One-touch fittings. Confirm the outside diameter
of the tubing. If the accuracy of the outside
diameter is +0.07mm or more for φ2, and
+0.15mm or more for other sizes, insert into the
one-touch fitting again without cutting it. When
tubing is re-inserted into a One-touch fitting,
confirm that the tubing is able to go through the
release button smoothly.
3) Hold the tube and push it in slowly, inserting it
securely all the way into the fitting.
4) After inserting the tubing, pull on it gently to
confirm that it will not come out. If it is not
installed securely all the way into the fitting,
problems such as leakage or disconnection of
the tube can occur.
②Removal of the tube
1) Press the release button firmly. Push the collar
evenly around its circumference.
2) Hold down the release button while pulling out
the tube. If the release button is not held down
fully, it will be more difficult to pull out the tube.
3) If the removed tubing is to be used again, cut
off the section of the tubing which has been
gripped. Re-using the gripped portion of the
tube can cause problems such as air leakage or
difficulty in removing the tube.
(2) Connection of the metal rod accessories
Do not use tube, resin plug, reducer, etc. after
connecting a fitting with a metal rod (KC series,
etc.) to a One-touch fitting. This can cause
the tube to disconnect.
(3) When mounting the tube, resin plug or metal
rod, do not press the release button.
Do not press the release button unnecessarily
before mounting tubing, resin plugs and metal
rods. This can cause the tube to disconnect.
Caution
(4) When using tubing from a manufacturer
other than SMC, be careful of the tolerance of
the tubing O.D. and tubing material.
1) Nylon tubing Within ±0.1 mm
2) Soft nylon tubing Within ±0.1 mm
3) Polyurethane tubing Within +0.15 mm,
Within -0.2 mm
Do not use tubing which does not satisfy the
specified tubing O.D. accuracy, or tubing with an
I.D., material, hardness, or surface roughness that
differs from SMC's tubing. Please consult SMC if
anything is unclear. It may cause difficulty in
connecting the tubing, leakage, disconnection of
the tubing, or fitting damage.
(5)Tubing O.D.φ2
Tubing other than that from SMC cannot be used
because it may result in the inability to connect the
tube, air leakage after connecting the tube, or
disconnection of the tube.
(1) When connecting piping to the
One-touch fitting, use a pipe length
with sufficient margin, in
accordance with the piping
conditions shown in Figure 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)