Tuesday, 14 December 2021
Tool Tuesday - Wire Brush
Tuesday, 9 November 2021
Tool Tuesday - Bahco Hacksaw
Tuesday, 5 October 2021
Tool Tuesday - Record Ball Peen Hammer
Tuesday, 28 September 2021
Tool Tuesday - Telescopic Bore Gauges
Today's Tool Tuesday is a particular favourite set of tools as they often are my first port of call when beginning to design or build a rocket! I often need accurate measurements of internal tube diameters and the Telescopic Bore Gauges are an excellent approach.
Each gauge covers a range of internal diameters and features 2 sprung probe sections that can be pushed back into the centre body of the gauge somewhat. In the handle mechanism there is a spring pushed bar which when you tighten a knurled nut at the back of the handle will lock the 2 probes in their current position. To get an accurate result you push the probes into the desired internal bore and hold the gauge at a slight angle and lock the probes to finger tight. You then pull the probes so that they span flat across the bore to bring it to it's final measured size. You then remove the bore gauge and use an accurate device to measure across the jaws of the probes, a well calibrated micrometer is best but often a vernier caliper across the probes is sufficiently accurate for most needs.
Tuesday, 21 September 2021
Tool Tuesday - Stud Clamps
Tuesday, 14 September 2021
Tool Tuesday - Budget EMT Shears
Tuesday, 7 September 2021
Tool Tuesday - RS Pro Flat Nose Pliers
Tuesday, 31 August 2021
Tool Tuesday - The Digital Multi Meter
The Digital Multi Meter or DMM is never far away from my hand and gets a lot of use. I was recently reminded of how it also can make some aspects of electronics more accessible. DMM come in fantastic variety of flavours and models and are available from around £5 through tow hundreds of pounds. They have heaps of uses and capabilities, measuring voltages, current, resistance, checking capacitors, and much more. I tend to use two functions of mine massively, checking DC voltage level is a popular task and also checking continuity ( a mode where if there is a connection between the probes it will beep) is so useful to check if something is connected.
Many DMM will check resistance but with some you need to know the order of magnitude you expect the resistance to be. These are selected using the rotary switch. Some DMM are "auto ranging" and as such will switch the units detected to the correct one for the measurement. So when checking a resistor that is 10,000 ohms it will detect and switch to give the value in kilo ohms. I ran a soldering workshop recently and I always give a short example of using the colour codes on a resistor to decode its value. However one of the participants was red green colourblind and would struggle to decode the band colours. Not a problem with an auto ranging DMM! The list of features on a basic multimeter is impressive but the list of all possible features in endless. Whilst for regular mains work I would want to spend more on a quality known brand, it's fair to say that for low voltage work electronics hobby stuff really good auto ranging DMM can be found for less than £20. A useful addition to any bench.
Tuesday, 24 August 2021
Tool Tuesday - The Breaker Bar
This week I've been swapping some wheels around on my old VW Caddy Mk2, well actually on two Caddy's, my one on the road, and my off road spares donor vehicle! It's common for tyre companies or garages to fit wheels using a compressed air impact driver and as such wheel nuts can be pretty heavily over torqued and difficult to undo. The answer is the humble but incredibly useful breaker bar. A breaker bar is a long oversize bar with a socket fitting at one end so it can receive a socket wrench. They are usually none ratcheting as socket wrench ratchets aren't often capable of very high torque. My breaker bar has a 1/2" socket wrench fitting and it lives in my van with a 17mm socket on it at all times as that is the size of my wheel nuts. I also carry a 19mm and a 21mm socket with it in case I can offer help to anyone changing a wheel as these are the other two common wheel nut sizes.
They work very well and definitely make life easier than trying to use the shorter lower quality tools that are often bundled with a a small spider jack in many vehicles.




