It is important the bit does not break, so the solution is the maximum utilisation of the material properties. Impaktor bits are ideal for use with power tools giving high and intense high torque. The Wera Hex-Plus provides larger contact zones in the screw head, which reduces the notching effect to a minimum and protects the profile.Īs with profiles, there are common bits used in the fastener industry – impaktor, stainless and BiTorsion bits. For the power transmission, this is a relatively unfavourable constellation, since the stress concentration is very high and can result in deformation of the screw. These are given by the absence of edges and the parallel form of the six profile elements.įinally, the hexagon is one of the best known and most widely used profiles and for sockets there is no alternative. This life extension of the screwdriver and screw results from the low radial forces. When compared to traditional screw profiles, more torque is transferred without damage to the screwdriver and screw when using TORX. Although this is an improvement, the Pozidriv profile still fights with the problems of slipping.Īnother common profile is TORX® – a star shaped wave profile with six rounded cams.
Two additional crosses supply an additional stabilisation during the screwdriving process. The Pozidriv profile is the third common drive profile and is a further development of the cross head profile. The Phillips profile is very often confused with the Pozidriv profile, which in erroneous use leads to damage of tool and screw. Once again, the Lasertip screwdriver can be used here. But, even in this profile the user has to counteract the cam out forces. Compared to the classical form of the slot version, because of the four corners of the Phillips profile the interaction with the screw is quite easy. The second common drive profile is the Phillips defined by two rectangular slot cross sections. The screwdriver tip ‘Lasertip’ from Wera literally bites into the screw without damaging it, taking away this disadvantage.
Slotted drives feature a simple slot as a host for the blade, however, they have a disadvantage of a lack of centring – making it easy for the tool to slip out of the screw. The five most common drive profiles are slotted, Phillips, Pozidriv, TORX® and hexagon. Here Wera Werkzeuge GmbH explains the different types available. Choosing the right equipment for the right application has a huge impact on the result of the work. Screwdrivers and drive bits are crucial elements in mechanical couplings and provide the link between the machine or the hand and the screw.
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