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How to do safety wire locking ?

 How to do safety wire locking?

Loose hardware or components have led to accidents, many of them fatal. Safety wiring, or positive wire locking, is a type of locking device that is the most positive and satisfactory method of securing or safetying cap screws, studs, nuts, bolt heads, and turnbuckle barrels, which cannot be safetied by any other practical means.
It is a method of wiring together two or more units in such a the manner that any tendency of one to loosen is counteracted by the tightening of the wire.
General Wiring Procedures
Procedures for installing safety wire include the following
Safety wire must be new upon each application.
All safety wires “must be tight after installation, but not under such tension that normal handling or vibration will break the wire.”
Twists should be “tight and even, and the wire between nuts as taut as possible without over-twisting.” (Six to eight turns per inch.)

A “pigtail” of 1/4- to 1/2-inch (three to six twists) should be made at the end of the wire run. This pigtail “must be bent back or under to prevent it from becoming a snag.”

Use SPECIAL TWISTING PLIERS, to twist the lock wire clockwise at a maximum angle of 60° and Do not put too much tension on the wire.
When you safetying with lock wire in the fueltank areas, make sure that you bend the wire ends with protrusion along the wires. You must also make sure that the wire ends stay near to the wire or the part that you lock.
The wire must be applied “so that all pull exerted by the wire tends to tighten the nut.
The wire should always “be installed and twisted so that the loop around the (bolt) head stays down and does not tend to come up causing a slack loop.”
Safety wire must never be overstressed. It will break under vibrations if twisted too tightly. Safety wire must be pulled taut when being twisted, and maintain a light tension when secured.
The length of the wire between the attachment points must be as short as possible.
If the distance is more than 100 mm (3.94 in.) – use one more attachment point.


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