About Us

Alpha McDelta Engineering, 32 Years of Thread Repair, Welding and Fabrication Expertise

Alpha McDelta Engineering is owned and run by Alex and Deanna McDonald and Evan “Bugs” Theunissen.

Established in 1981, Alpha McDelta Engineering was conceptualised as a light engineering company, specialising in welding, motorcycle engineering and restoration of damaged threads (Thread Repair).  Combining their expertise, wealth of knowledge and hard work the company grew to what it stands for and represents today.

For the past sixty years Alex has been involved with motorcycles, either racing, riding or working on them and this remains his passion.  “Bugs” is well known in the rebuilding and restoration of classic cars and his workmanship is unsurpassed. The work ethic that Alex and Bugs have instilled in their staff is what has made Alpha McDelta the Thread Repair, Welding and Fabrication specialists that they are today!

Testimonials on Thread Repair, Welding and Fabrication

“I have been dealing with Bugs and Alpha McDelta Engineering for approximately 13 years and have always found the workmanship and service to be of the highest standard. If only all the other companies I dealt with offered the same level of quality and service.” – Garth


“I am an incredibly particular person so when the design, manufacture, fabrication and installation of the wheel carrier far exceeded my expectations I was absolutely delighted.  I would not hesitate to recommend Alpha McDelta Engineering. We only use Alpha McDelta to ensure that all our engineering needs are done right the first time.” – Martin Steyn    www.servicemaster.co.za


“Back in the 1980’s I was very fortunate to have had Alex McDonald as my journeyman when I served my apprenticeship at Alpha McDelta Engineering.   The work ethic that Alex instilled in me and the skills he taught me have been very been instrumental in the success of my business. Alex was a hard task master  who took exceptional pride in his work and expected nothing but the best from us at all times.

In addition to  personally sending numerous jobs to them, I  would have no hesitation in recommending Alpha McDelta Engineering and often refer my customers to them, their workmanship is always of the highest standard.” Patrick O”Keeffe  www.racetechyamaha.com


To find out more, click on the Thread Repair or Welding  pages or contact us to discuss the right solution for you.