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Screwdriver bits 1161

Phillips or Pozidriv screws? It's the cross-head that matters.

Screws with cross head are indispensable for installation works in trade and industry. They are deployed in various designs. Differentiation is made between the classic Phillips screw (PH) and the subsequently developed Pozidriv screw (PZ). The first glance shows a different design: contrary to the PH screw, the PZ screw is provided with additional star lines from its recessed corners. PZ screw heads also have parallel-running deep flanks, not in conical shape as in case of the PH screw.

The different construction results in different characteristics: while both screw types allow excellent centring, the PZ screw furthermore provides greater side stability due to the parallel flanks. This reduces the risk that the screwdriver slips to the side. Compared to the longitudinal slot screws, screws with a cross slot principally have higher torque. When using the incorrect screwdriver, you not only loose the advantages of the profile, you also damage the screw and the tool.

Phillips screw

Pozidriv screw

Everything for the correct twist: The world of bits.

Stainless steel. If stainless steel screws are used the application of tools made of the same material is recommended: this prevents extraneous rust - i.e. from steel particles of conventional bits. Stainless steel bits are vacuum ice-tempered and comply with workshop requirements. Hex-Plus geometry. Hex-Plus tools by Wera reduce the risk of recess hexagon screws being "rounded" over time due to sharp edges. This is achieved with a greater contact surface in the screw head. It reduces grooving and wear and allows the transmission of greater torque. Holding function (generally non-magnetic). Screwing tools with mechanical holding functions have three advantages: they provide secure hold in the screw and thus prevent that it is lost during the action. This is added by a better positioning of the applied tool during work. Furthermore, the mechanical holding function also works in case of non-magnetic screws and in areas where magnetism is not wanted. "Take it easy" tool finder. With the "tool finder" system (at the 5 standard drives), Wera facilitates the selection of the suitable tool sizes by way of colours. The tool finder allows the quick allocation also in case of bad lighting conditions and helps in keeping the equipment complete. The ring as well as the print are petrol and oil resistant. INOX

As variable as the work of screwdriver applications, as variable is also the selection of bits. To obtain a general idea, here is an overview of the different systems and designs. Extra hard. Extra hard bits are primarily suited for the soft driving into wood. They prevent premature breaking. Tough hard. Tough hard bits are designed for universal use. They prevent premature breaking. Torsion. This technique cushions torque peaks in the torsion zone of the bit during the screw action. This prevents premature wear and prolongs the life of the tool. BiTorsion. In this bit design, the torsion zone exhibits more than 20% reduced hardness compared to the shaft. This cushions high torque peaks and protects the bit to prolong its life. Diamond coated. Bits with diamond coating live long and allow universal use: their surface particles bite into the screw head and ensure the secure fit of the tool. Impaktor. The bits of the Impaktor series by Wera are designed for the work with impact drivers. They are respectively more robust concerning their geometry and material. With different torsion zones, they automatically react to torque peaks and adapt to the screw joint. Added to this is a diamond coat for a firm position in the screw head.

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