Kongsberg Simrad CP200-5C, Installation Manual

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Related topics
Preparations, page 22
Transducer installation principles, page 27
Installing the transducer, page 57
Installation summary, page 58
Using self-locking taps
The mounting rings delivered by Kongsberg Maritime are fitted with self-locking threads.
Normal screws are designed to be loosened. It is however important to avoid accidental
loosening, especially when the installation is subjected to dynamic stress. For this reason,
additional locking devices are required. These are often expensive, they can only be used
once, or react critically to temperature changes.
Introduction to Emuge self-locking threads
Emuge self-lock is a tap 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 (for example chemical, nylon
or mechanical). The Emuge self-lock bolts withstand the vibrations better than standard
(metric) threads, because the thread contact stops the sideway 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.
A Emuge’s saw-tooth profile up to pitch P ≤ 0.7 mm
B
Emuge’s saw-tooth profile up to pitch P >0.7 mm
C
Standard thread
D
External thread
E Internal thread
The advantages of using Emuge self-lock thread include:
Installing the transducer