Simrad ES200-7CD
Using self-locking taps
Screw connections are generally made so that they can be
loosened again. However, accidental loosening, especially under
dynamic stress, must be avoided. For this reason it is often
necessary to use additional locking devices. These are often
expensive, they can be used once only, or react critically to
temperature changes.
Note
This section is a reprint of procedure 842–202125.
Introduction to Emuge self-locking threads
Emuge self-lock
is a bolt design with an integrated locking feature.
Standard metric bolts are used. The internal thread provides a
self-locking connection, which can be used repeatedly. It is not
necessary to involve a secondary locking device (e.g. chemical,
nylon or mechanical). The
Emuge self-lock
bolts withstand
vibrations better than standard (metric) threads, because the
thread contact stops the sideways movement. The special
design of the internal thread profile also provides a more even
distribution of the tightening stress over the whole thread length.
The assembly is just as easy as with a normal (metric) thread.
There is no general applicable standard (e.g. DIN standard) for
the
Emuge self-lock
thread.
Figure 5 Example, internal and external threads
A
B
C
2
1
(CD017020B)
(A) = Emuge’s saw-tooth pro
fi
le up to pitch P
≤
0.7 mm
(B) = Emuge’s saw-tooth pro
fi
le up to pitch P
≥
0.7 mm
(C) = Standard thread
(1) = External thread
(2) = Internal thread
The advantages of using
Emuge self-lock
thread include:
14
307121/A
Summary of Contents for ES200-7CD - REV B
Page 2: ......
