Hand tools catalogue - Unior

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Insulated tools
A special procedure for the manufacture of insulated tools
1. Cold forging of the socket: this uses a two-phase technological process that includes
annealing, phosphating, and contracting.
2. Cnc working of the socket: a special CNC turning machine is used to work the socket into
the required size, which is in accordance with the ISO standard.
3. Sanding: cleaning the surface before chroming is important for the sake of quality and
durable surface protection.
4. Chroming: the sockets are plated with a thin, hard coating of chromium oxide that
protects against corrosion and wear and other mechanical damage. At the same time it
gives the entire Unior socket a glossy appearance.
PLASTIC COATING PROCESS
5. Double plastic coating: The process of coating of tools in multiple layers of plastic
appropriate for work under high voltage conditions is a series of operations with precisely
defined parameters of implementation that must not deviate from the requirements. This
is the only way to obtain a quality and, most importantly, safe product.
Before plastic coating, the piece - the metal part of the tool - has to be prepared for the
process. It is degreased in a container of acetone and then dried. In order for the material
and the metal part of the tool to adhere together effectively in the required places, the
metal part of the tool is submerged in a special liquid that activates its adhesive property.
This is followed by mounting the piece on special holders. The process of heating starts in
a special chamber furnace and it is then immediately submerged in an orange material.
It has to be removed from this material, which is heated to the right temperature, with
the optimum speed so that the material drips off. Before the second plastic coating, the
pieces are gelatinized in a furnace at the prescribed temperature. This is followed by a
second plastic coating with a red material, the process of gelatinizing is repeated and the
final plastic coating, once again of the red material, gives the piece the final thickness of
a two- or three-layered coating. For the appropriate gloss and a professional appearance,
the pieces are stabilized in a furnace at the prescribed temperature.
ORANGE AS A WARNING SIGN:
The double plastic protection of the VDE tools ensures double safety,
because it enables the recognition of worn out tools in due time. When
the tool gets worn out, an orange colour appears (the second protection
layer), which is a sign that the tool should be replaced immediately.
Safe tool Worn out tool – immediate replacement