The Shed - Metalwork

Milling – showing restraint

27 September 2022

In Part One of this series on the milling machine we put the milling machine in the workshop and had it levelled. Before you use the machine, it is important to check the alignment of the spindle. Then comes understanding the importance of preparing the workpiece. Work to be milled or drilled on the milling machine has to be set up so that it does not move during the job. This is one of the most important things you can do if you don’t want an important component or workpiece to end up as scrap because it moved.

Build a portable barbeque

24 August 2022

At home, I have a big barbecue in the backyard and a little barbecue upstairs on the balcony that I use when there are just two of us. This hibachi or portable barbecue would be ideal for just two although the grill rack is big enough for four or five steaks or chops and sausages. It can be made with scrap mild steel and a piece of cut pipe. You will find scrap bins at your local engineering works. Most pieces of metal under a metre seem to go in there. You could ask and many companies would be happy to help out, perhaps for a couple of beers.

As tough as steel

13 July 2022

The chemistry of steel determines why and how it should be tempered.
The potential hardness of a steel is determined by its carbon content. Adding small amounts of other elements to the mix can produce enormous improvements in strength, toughness, and
resistance to rust and the response of the steel to heat treatment.
Steels referred to as alloy steels have additional elements such as chromium, nickel, vanadium,
cobalt, manganese, molybdenum, silicon, and tungsten included.

Assorted nuts

2 June 2022

For our purposes, a nut is an internally threaded part which is rotated or screwed onto an externally threaded part such as a screw, bolt or stud. If you can pick it up in your hand and put it onto an externally threaded item and tighten it, it is a nut. There will be some exceptions to this which will become apparent.

The Auckland Blade Show is back for 2022

24 May 2022

The Auckland Blade Show is back, bigger and better than ever.
Come along to the Ellerslie Event Centre on the 24th and 25th of September to get your hands on the finest custom blades in the country. With over 30 makers exhibiting, we have hunting knives, kitchen knives, and even swords and axes.

A mechanic turns to clocks

16 March 2022

Ken England has been fixing clocks as a hobby in his Whakatane shed since the 90s.
Repairing a clock is not just a case of pulling it to bits, replacing parts then re-assembling, he tells me. “Everything works in sequence and has to be timed.”
He is a member of the New Zealand Horological Institute but was never a clockmaker by trade. What makes Ken “tick” and has given him the necessary clock-repair skills is the engineering know-how already in his background, a knowledge of how to machine parts, manufacture, and silver-solder.

Know the drill

8 December 2021

There are so many varieties of building and engineering materials available these days it is likely that you will need a variety of drill bits in your workshop.
There are always a number of holes required to complete your projects at work, or more importantly those underway in the shed. We are going to cover some of the common products that are readily available from most DIY hardware stores and industrial suppliers, and also some items that you may have to ask for, or even
visit a specialist cutting tool supplier like Trade Tools to find.

Make a handy English wheel

14 September 2021

So it was time to start fabricating my own parts and for that I would need a so-called English wheel machine to mould the tank, guards, seat pan etc. But buying such a machine was “off the budget” as they come with a hefty price tag.
The next option was to build one. With not a lot of plans available, I could see that I’d have some homework to do.

Gasless wire welding is a breeze

25 August 2021

Gasless welding using a flux-cored wire is a MIG welding process that relies on a continuous, tubular wire feed. Gasless wire welding was originally designed as a replacement for stick welding, mostly for use outside where protecting gases could be blown away by the wind and higher productivity was necessary.

It’s a cinch

3 August 2021

Make your life easier with the Tusk Carbide Burr.

Brazing and soldering

28 July 2021

Brazing can be described as the joining of two or more pieces of base metals together using a copper or silver-based filler rod.

Build a sand trolley

3 June 2021

I used a pipe 3200mm long, but it depends on what you have. This is 2400mm along the flat and bent up at the front. The horizontal distance, from the flat to the tip lengthwise, is 340mm. I measured from a square on the pipe, and out 340mm for the bend. The axle is usually 1200mm. I turned a little insert stub axle for putting through the one-inch (25mm) bush in the centre of the wheel and into the axle. You could also turn down the axle to fit. It’s a straight bush because bearings and saltwater don’t mix.

3D Printing

20 May 2021

Here we’re going to use 3D printing to do a modern twist on “lost wax” casting.
It’s a trick that’s more than 5000 years old: make something in wax, bury it in clay or plaster leaving a hole in the shell. Bake the heck out of it to remove the wax and then pour molten metal down the hole. If everything stays together, you get a metal replica of your wax object.

Make your own telescope

7 May 2021

This a project to make a popular Newtonian-design reflector telescope with a Dobsonian mount. The principle of the telescope is to collect light and then magnify the image. The light from a distant object (a star or planet) is gathered by the mirror and brought to a focal point. The eyepiece is used to focus and enlarge the image. By changing the eyepiece, we can increase the magnification and the size of the image. The larger the objective or mirror the more light it can gather and therefore you can use a higher magnification eyepiece.

Metal with pictures

22 April 2021

The basics of engraving are not too difficult and can be mastered with perseverance. However, as with anything, it takes practice to achieve true dexterity and ability. There is nothing more beautiful, timeless, exacting or lasting than a craftsman’s engraving. The best way to begin is to give it a go.

Metalwork