Simrad ES120-7C - REV D, Installation Manual, Page: 37 / 98

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Related topics
Installing the transducer, page 21
Using self-locking taps, page 35
204579 Dimensions ES120-7C with open ended cable, page 79
204675 Mounting ring ES120-7C, page 83
204677 Clamping ring ES120–7C, page 85
204678 Mounting arrangement ES120-7C, page 88
Designing, manufacturing and mounting the installation hardware, page 24
Using self-locking taps
The mounting rings delivered by Kongsberg Maritime AS are fitted with self locking
threads. Screw connections are constructed so that these can be loosened again. It is
important to avoid accidental loosening, especially under dynamic stress. Additional locking
devices are necessary to be used for this reason. These are often expensive, they can be used
once only, 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.
Installing the transducer