Datasheet

Maintenance
Caution
1. Installation and removal of tubing for One-touch fi ttings
1) Installation of tubing
(1)
Cut the tubing perpendicularly, being careful not to damage the
outside surface. Use an SMC tube cutter TK-1, 2, 3, 5 or 6. Do
not cut the tubing with pliers, nippers, scissors, etc., otherwise,
the tubing will be deformed and trouble may result.
(2) The outside diameter of the polyurethane tubing swells when
internal pressure is applied to it. Therefore, it may be
possible that the tubing cannot be re-inserted into the One-
touch fi tting. Check the tubing outside diameter, and when
the accuracy of the outside diameter is +0.07 mm or larger for
Ø 2, +0.15 mm or larger for other sizes, insert into the One-
touch fi tting again, without cutting the tubing to use it. When
the tubing is re-inserted into the One-touch fitting, confirm
that the tubing goes through the release button smoothly.
Caution
1. Be certain to wear safety glasses at all times during
periodical inspections.
2. Replace fittings or tubing having the following
problems.
1) Cracks, gouges, wearing, corrosion
2) Air leakage
3) Twists or crushing of tubing
4) Hardening, deterioration, softening of tubing
3. When replacing tubes or fi ttings, do not try to mend
or repair and then reuse them.
One-touch Fittings
Mounting / Piping
Caution
One-touch Fittings
Mounting / Piping
Fittings & Tubing
Precautions 3
Be sure to read this before handling products.
1. Perform maintenance inspections 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 fl ushing
Remove drainage from air fi lters 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
confi rming that appropriate measures are in place to prevent
cylinders from sudden movement.
Warning
(3) Grasp the tubing, slowly push it straight (0 to 5°) into the
One-touch fi tting until it comes to a stop.
(4) Pull the tubing back gently to make sure it has a positive
seal. Insufficient installation may cause air to leak or the
tubing to release.
As a guide for checking the tubing is not pulled out, refer to
the following table.
Tubing size Tensile force of tubing [N]
Ø 2, 3.2, 1/8" 5
Ø 4, 5/32", 3/16" 8
Ø 6, 1/4" 12
Ø 8, 5/16" 20
Ø 10, 3/8" 30
Ø 12, 1/2" 35
Ø 16 50
2) Removal of tubing
(1) Push the release button flange evenly and sufficiently to
release the tube. Do not push in the tubing before pressing
the release button.
(2) Pull out the tubing while keeping the release button
depressed. If the release button is not held down
suffi ciently, the tubing cannot be withdrawn.
(3) To reuse the tubing, remove the previously lodged portion
of the tubing. If the lodged portion is left on without being
removed, it may result in air leakage and removal of the
tubing diffi cult.
2. Connecting products with metal rods
Products with metal rods (KC series, previous KQ series, KN
series, and KM series, etc.) cannot be connected to KQ2
series One-touch fittings. If connected, the metal rod cannot
be retained by the chuck of the One-touch fitting and products
with metal rods may project during pressurization, causing
serious personal injury or accident.
Even when products with metal rods can be connected to
other One-touch fittings, do not use any tube, resin plug, or
reducer after connection. This may cause releasing.
For details about One-touch fittings that can connect products
with metal rods, contact SMC.
218
Metric Size M, R, RcInch Size UNF, NPTInch Size M, R, Rc
Metric Size GMetric Size R, RcInch Size NPTInch Size RMetric Size UniInch Size Uni
Sealant/Gasket SealFace SealGasket Seal
Round
Type