SMC Networks KR-W2 Series Operation Manual page 10

2. Specific Product Precautions (6)
Chamfer Dimension for Female Thread
Caution
(1) Chamfer dimension for female thread of the
connection thread M3, M5, 10-32UNF
Confirming to ISO 16030 (air pressure fluid
dynamics - connection - ports and stud ends), the
chamfer dimensions
recommended.
By chamfering as shown in the following table,
machining of threads is easier and effective for burr
prevention.
Connection
thread size
M3
M5
10-32UNF
(2) Chamfer dimension of R and NPT thread with
sealant, and Uni thread
Connection
thread size
G
1/16 -
1/8 10.2 to 10.6 10.2 to 10.4 10.5 to 10.7
1/4 13.6 to 14.0 13.6 to 13.8 14.1 to 14.3
3/8 17.1 to 17.5 17.1 to 17.3 17.4 to 17.6
1/2 21.4 to 21.8 21.4 to 21.6 21.7 to 21.9
* For Uni thread, Rz12.5 is necessary for sealing at the
chamfered part.
shown below
Chamfer dimension øD
(Recommended value)
[mm]
3.1 to 3.4
5.1 to 5.4
5.0 to 5.3
Chamfer dimension øD
(Recommended value)
[mm]
NPT,
Rc
NPTF
- 8.2 to 8.4
Recommended Piping Conditions
Caution
When connecting piping to the One-touch
fitting, use pipe length with sufficient margin, in
accordance with the piping conditions shown
in Fig. 1.
are
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).
Fig.1 Recommended piping
Tubing
Nylon
size
tubing
84 or
ø 6
more
112 or
ø 8
more
140 or
ø 10
more
168 or
ø 12
more
- 9 -
Mounting pitch A
Soft nylon
Polyurethane
tubing tubing
66 or
39 or more
more
88 or
52 or more
more
110 or
69 or more
more
132 or
88 or more
more
Straight
line
length
30 or
more
40 or
more
50 or
more
60 or
more
Unit: mm