First, materials with excellent performance
Generally, the body of a screwdriver includes a screwdriver bit and a blade. They are all made of metal materials, and the outside of the handle is made of plastic materials. As a rotating tool, the main body of the screwdriver needs to have good rigidity, but also good toughness. The ideal screwdriver bit should be hard and the overall toughness should be good.
High-quality screwdrivers are generally made of good alloy steel, and the medium and high-grade screwdrivers are mostly made of chromium vanadium steel, which is an alloy tool steel with chromium vanadium alloy elements. In order to improve the wear resistance and toughness of steel, the hardness can reach the level of 60HRC after heat treatment. Generally, screwdrivers made of chrome-vanadium steel will be marked with the CR-V mark.
The more advanced screwdriver material is chromium-molybdenum-vanadium steel, the word mark is CR-MO or CRMOV, also known as ~1, chromium-molybdenum-vanadium steel has better toughness, widely used in the world's top screwdrivers and small hexagon wrenches and other high-demand tools, many industrial-grade screwdriver bits are also made of chromium-molybdenum-vanadium steel, and the most extreme approach is even to use diamond coating or titanium nitride coating on the cutter head to improve the hardness of the cutter head and extend the service life.
Second, exquisite processing technology
The quality of the material processing technology determines the final quality of the screwdriver. The hardness and deformation of the screwdriver bit are closely related to the heat treatment process during machining. The hardness of the cutter bit is related to the wear resistance of the cutter bit, when dealing with the screws that are tightened very tightly or some rusted, the high hardness of the screwdriver shows an advantage, some low-grade screwdrivers may not loosen the screws, the cutter head itself is deformed first, and the high-hardness screwdriver bit can sometimes even break the inferior screws, and it is not damaged at all.
In addition, the machining accuracy of the screwdriver bit is also very important, especially some special star, rice, hexagonal screwdrivers and some precision screwdrivers, the size and angle of the cutter head are exquisite. Screwdrivers with low precision are prone to damage the screw's slot.
Third, excellent product design
Some products add magnetism to the screwdriver bit, special treatment of the cutter head, increase the friction coefficient, the hexagonal power assist design is added to the tool holder, which can be easily assisted by a wrench, and some combine the screwdriver head and the tool holder with an integrated design, and the movable connection parts are located in the tool holder, which can greatly improve the overall type of the combination screwdriver.
It is not much different from a single independent screwdriver, and it is also suitable for entering some narrow screw holes like a single screwdriver, for combination screwdrivers, in addition to the design points of traditional screwdrivers, how to make the moving parts closely integrated is the key, and its highest level is to achieve the overall effect like a single screwdriver.
The screwdriver handle is the easiest part to design, such as the design of the upper edges and corners on the handle, which can effectively prevent the screwdriver from rolling, the shape of the handle refers to the ergonomic design, suitable for the characteristics of the hand, and increases the comfort of operation, the use of soft and hard handle materials to increase the friction coefficient between the handle and the palm of the hand, so that the operation is more comfortable, and the rotatable handle base is installed on the precision screwdriver handle to facilitate continuous rotation.
In general, for a high-quality screwdriver, the material is the foundation, the processing is the key, the design is the icing on the cake, not the use of good steel must be a high-end screwdriver, there are now some screwdriver products in China, flaunting their use of CR-V materials, implying that the user is a high-end product, in fact, it is not necessarily so. The chromium vanadium steel and chromium-molybdenum vanadium steel mentioned above are just one type of steel, specific to steel, as well as domestic steel, Japanese steel, Swedish steel, and German steel, and there are certain differences in their quality, which is also one of the reasons why some CRV material screwdrivers are cheap.