Modern hand-held power tools
Hand-held power tools work with an electric motor and ease manual labour. An electric drill makes holes in different materials; its motor turns the chuck through a reduction gear. An electric plane uses a rotating shaft with two or four blades to plane wood into shavings 0.75 to 2 mm thick and remove unevenness. A hammer drill adds impact to rotation, so it makes holes in hard materials such as concrete and brick. A sander smooths and polishes wood, metal, plastic, stone and glass. These tools are very dangerous: they are used only under a teacher or master, with goggles, ear protection and a dust mask, the workpiece clamped firmly, the cable intact and clothes and hair tied back, and the plug is pulled out of the socket before any bit or accessory is changed.
Card game: each tool name and its job are on separate cards; find the pairs. Then make a class safety poster: “Unplug, then change”, “Goggles, ear defenders, mask”, “Workpiece clamped”. Pupils never switch on a real tool by themselves.