Introduction To Emuge Self-Locking Threads - Simrad 38-200 COMBI W - INSTALLATION REV D Installation Manual

Simrad 38/200 Combi W
Figure 10 Example, internal and external threads
30

Introduction to Emuge self-locking threads

is a tap design with an integrated locking feature.
Emuge self-lock
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
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 thread.
Emuge self-lock
Emuge's saw-tooth profile up to pitch P ≤ 0.7 mm
A
B Emuge's saw-tooth profile up to pitch P ≥ 0.7 mm
C Standard thread
1 External thread
2 Internal thread
Advantages
• The thread locking feature is integrated in the internal thread
• Modified profile with ramp surface in the direction of stress
• 30 degree ramp surface provides self-locking effect
• Easy assembly
• No assembly errors (forgetting the locking device) possible
• Use of standard external threads (screws) with tolerance class
"medium"
• Even distribution of stress over the whole thread length
• No stripping of threads
bolts withstand
Emuge self-lock
164986/D