Miniature Machining

Miniature Machining Precision machining / engineering of once off and small volume mechanical components. Please find more info on our website: miniaturemachining.webs.com

Prototype engineering
Repairs to machinery
Building of bespoke / tailor-made-equipment Miniature Machining also produces parts for prototype machinery, radio controlled model-aircraft, boats and cars. When required these parts can be assembled to form a working unit or machine. Custom-made parts are manufactured according to customer specifications, drawing or sample-part. Materials used include, various types of steel, brass, aluminum and plastic.

17/08/2026

A demonstration of my bandsaw-blade welding system in action😀

15/08/2026

As mentioned previously, I am in the process of creating a system with which I can weld my own bandsaw-blades. In this short movie I present the welding-power supply for welding the blade and there after annealing the blade. (Annealing is a process, whereby the blade is heated to a somewhat lesser temperature after welding and in particular the rate of cooling is carefully controlled, to SLOWLY cool. This avoids a hard, brittle welding-portion in the blade which would easily break).

04/08/2026

Navigating electricity challenges :-)

26/07/2026

I have been working on a method with which I can weld band-saw-blades. This movie gives an overview. For those interested in more detail, you can view my initial failure🥲 through to excellent results 😀on my youtube-channel where I have created a multi-part playlist here: https://youtube.com/playlist?list=PLC_jGLprklBA&si=uMilb_P3odr1aLcy

This is a picture of the circuit board for a battery charge controller which I built for my wind turbines. Thank you to ...
16/07/2026

This is a picture of the circuit board for a battery charge controller which I built for my wind turbines. Thank you to Hugh Piggott for publishing the plans for this circuit. It has functioned at our home in a robust manner for well over 10 years now :-)
I discuss an overview of this charge-controller in my book "The Imbali Windmill" from page 11 and then go into greater detail how I built this circuit from page 133 onwards. My book can be freely accessed by those interested by going to my linked in page, post-section here: https://www.linkedin.com/in/felix-thoma-57126134/

These are pictures of a working Stirling Engine which I built plus / minus 25years ago. I came across the paper-pictur...
27/06/2026

These are pictures of a working Stirling Engine which I built plus / minus 25years ago. I came across the paper-pictures recently :-)

The first time I encountered one of these machines was in a museum. I became fascinated. The thing that is unique to the Stirling engine, which is sometimes revered to as a "hot air" engine, is that the working gas, which is in most cases air, remains contained within the engine. Its working-principle relies on the expansion of the air through heat, which then acts against the "power-piston" rotating the crank mounted on the shaft with the flywheel and then again on the contraction of the hot air when it is cooled by the radiator.

My model in the pictures worked nicely although it had a very modest power-output.

The keen observer might notice the flame providing the heat to the engine in the lower left-hand corner of the picture. Somewhat further to the right, the radiator that is made from aluminium and more to the top of the picture the power piston and cylinder connected to the crankshaft and flywheel.

Painting complete 😀
04/05/2026

Painting complete 😀

21/04/2026

A sheet-metal bending machine that I built.

Address

Bothas Hill
Durban

Opening Hours

Monday 08:00 - 17:00
Tuesday 08:00 - 17:00
Wednesday 08:00 - 17:00
Thursday 08:00 - 17:00
Friday 08:00 - 17:00

Telephone

0832544347

Website

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