Screws are absolutely indispensable for strong connections. Especially wood construction screws that are used for force-fitted connections. Long carpentry screws for example, that usually take great effort or can only be screwed in using large machines. If only one could eliminate the sometimes painful process of installing screws.
Screws have been part of our lives for a very long time. So one might assume that their development has long since been concluded. Far from it. There is room for the further perfection of screws. Energy-saving screws are the latest generation. Sounds promising? It is. They can be screwed into wood with considerably less effort so that people and machines save energy.
Such ingenious inventions are not only a genuine benefit for do-it-yourselfers, but a great help for people who have to install hundreds of wood screws every day at work. Just about everyone has experienced the possible consequences of installing screws. Whether by hand or using a cordless screwdriver, contorting the wrist or holding a heavy power screwdriver in a cramped position is practically unavoidable. Especially when it comes to very long wood construction screws, like those used by carpenters. The strain on muscles and joints is considerable over the long term.
Our body has a sophisticated system of interacting muscle chains, stabilising ligaments and elaborate joint systems (tensegrity model). Strenuous screw installation with the resulting contortion of the wrist can interfere with the smooth interplay. This results in muscular imbalances. First comes pain in the wrist, then the elbow, and finally the shoulder and back. With novel wood screws on the other hand, the risk of muscular imbalances and muscle tension is considerably reduced. The significant reduction of the required effort, with no need for pre-drilling, alleviates back strain. Especially when screwing in wood screws longer than 20 or 30 cm.
New generations of wood screws with a sophisticated design that lowers the screw-in resistance by up to 50 per cent can considerably reduce strain on the musculoskeletal system. Screws with the TEN Stairs thread technology for example. Small, offset stairs between the threads on the screw’s core diameter reduce the contact surface between the wood and screw. This reduces friction and therefore the screw-in resistance. A perfect fit with the drive unit and fast “biting” into the material result in a considerable reduction of effort for humans and machines compared to standard screws.
By the way, not only the back benefits, but also the wood. The wood fibres remain virtually undamaged during installation and adapt to the screw’s thread core after it is screwed in. This results in better interlocking of the screw and component. Being able to install almost twice as many screws with one battery charge is another benefit. And just like muscles and joints, the strain on screw-driving equipment is also reduced, with the lower expenditure of energy leading to a longer service life.
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