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Hand Tools
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Articles marked ◊ are not held in stock, procurement is effected at short notice.
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 or Pozidriv screws? It's the cross-head that matters.
Phillips screw
Pozidriv screw
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.
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.
Everything for the correct twist: The world of bits.
INOX
D
D
Screwdriver bits
1161