Datasheet
Straight line
Mounting pitch A
Figure 1 Recommended piping
Recommended
No good
Figure 2 When using a tying band to bind the piping together
Handling of One-touch Fittings
Caution
1. Tubing attachment/detachment for One-touch fit-
tings
1) Installing of tubing
(1) Use tubing with no flaws on its periphery and cut it off at a
right angle. When cutting the tubing, use a tube cutter,
TK-1, 2 or 3. Do not use pinchers, nippers or scissors, etc.
If cutting is done with tools other than tube cutters, the tub-
ing may be cut diagonally or become flattened, etc. This
can make a secure installation impossible, and cause prob-
lems such as the tubing pulling out after installation or air
leakage. Allow some extra length in the tubing.
(2) The outside diameter of the polyurethane tubing swells
when internal pressure is applied to it. Therefore, it may
not be possible that the tubing can be re-inserted into the
One-touch fitting. Confirm the tubing outside diameter,
and when the accuracy of the outside diameter is +0.15
or larger, re-insert the tubing into the One-touch fitting
without cutting it. When the tubing is re-inserted into the
One-touch fitting, confirm that the tubing goes through the
release button smoothly.
(3) Grasp the tubing and push it in slowly, inserting it secure-
ly all the way into the fitting.
(4) After inserting the tubing, pull on it lightly to confirm that it
will not come out. If it is not installed securely all the way
into the fitting, this can cause problems such as air leak-
age or the tubing pulling out.
2) Removal of tubing
(1) Push in the release button sufficiently. When doing this,
push the collar evenly.
(2) Pull out the tubing while holding down the release button
so that it does not come out. If the release button is not
pressed down sufficiently, there will be increased bite on
the tubing and it will become more difficult to pull it out.
(3) When the removed tubing is to be used again, cut off the
portion which has been chewed before reusing it. If the
chewed portion of the tubing is used as it is, this can
cause trouble such as air leakage or difficulty in removing
the tubing.
2. Do not install the SMC’ s KQ One-touch fitting series
with a metal rod into the ZFC5 series fittings. The
metal rod will not be held and the fitting will shoot
out.
Recommended Piping Conditions
1. When connecting piping to the One-touch fitting, use
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 togeth-
er, make sure that external force does not come to bear on the
fitting. (see Figure 2)
Tubing size
Mounting pitch A
Unit: [mm]
Nylon tube
Soft nylon tube
Polyurethane tube
56 or more
84 or more
89 or more
112 or more
140 or more
134 or more
168 or more
30 or more
39 or more
56 or more
58 or more
70 or more
76 or more
82 or more
26 or more
39 or more
57 or more
52 or more
69 or more
69 or more
88 or more
Straight-line
pipe length
ø4, 5/32"
ø6
ø1/4"
ø8, 5/16"
ø10
ø3/8"
ø12
20 or more
30 or more
32 or more
40 or more
50 or more
48 or more
60 or more
Series ZFC
Specific Product Precautions 2
Be sure to read before handling. Refer to back cover for Safety Instructions, “Handling
Precautions for SMC Products” (M-E03-3) and Operation Manual for Vacuum Equipment
Precautions. Please download it via our website, http://www.smc.eu
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