Repair damaged threads
September 1st 2006

Keylocking Threaded Inserts available from Coburg Engineering in metric and imperial sizes solve several common metalworking problems.

Stripped, damaged or worn internal threads are easily replaced by new, stronger threads, without the need for special tools.

These inserts can also be used to strengthen parent materials such as aluminium, and to repair holes that have been drilled and tapped oversize or to compensate for holes that have been drilled and tapped in the wrong location by, in effect, re-positioning the centre axis.

To prevent the insert rotating when it is installed, opposed locking keys four for inserts with an internal thread size of M7 or larger and two for smaller inserts are simply driven down into the surrounding base material, securing the insert in place.

However, as Nicholas Auger, Coburg's Managing Director, points out: "Keylocking Threaded Inserts are both easy to install and easy to remove, and new inserts can be installed without risk of damage to the workpiece."