Wire locking

Non-corrodible steel and brass wire, of the appropriate gauge, are normally used for wire locking. Generally, a hole is provided for this purpose in the component to be locked and the wire is passed through and twisted. The lay of the wire between the anchorage and the component must always be such as to resist any tendency of the locked part or parts to become loose.

Figure 16.26 shows the plan view of a pressurized cylinder and the cover is held down by four bolts which are wire locked. The operation is performed with a single strand of wire. The wire is passed in sequence through the holes in the bolts and the ends are twisted together to tension the wire loop. Note, that in order to become loose, the bolts must turn in an anticlockwise direction but this will have the effect of increasing the tension in the wire loop. The locking wire should only be used once.

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