WCA January 2011

54 / 76

Wire drawingmachinery
Wire & Cable ASIA – January/February 2011 52
Components for most wire drawing
machines
As UK representative, Techna provides the entire range of wire drawing components from Naber & Wissmann GmbH.
Capstans, cones and drawing rings for almost any wire drawing machine, including those of Niehoff, Henrich, Herborn, Samp
and Syncro, are available to manufacturers’ specifications, in a wide range
of materials.
Materials include:
NWZ-A ceramic (zirconium oxide/aluminium oxide) or ceramic-steel
compound, said to have been tested under the most difficult drawing
conditions, and shown to provide optimum wear resistance and operational
efficiency, in sizes up to 500mm diameter.
NWM-74 for drawing of non-ferrous metals, especially copper and its alloys.
This is thermally coated and alloyed to the basic material to provide a fine
spread of hard materials such as
carbides, borides and silicides
for an extremely wear-resistant
working surface.
NWM-81/83 is built-up in a
thermal coating process but with
a higher proportion of tungsten
carbide, making it suitable for drawing steel cord wires. With a thickness of
around 0.8mm and a hardness of HV=2,900 to 4,600kp/mm, it may be repeatedly
re-ground and is resistant to shock, breakage and thermal shock.
NWK-78 material provides an oxide-ceramic coated surface for components with
high surface quality, believed ideal for drawing copper and plated-copper wires.
Worn draw-steps can be re-coated and returned to their rated diameters.
NWS-12 is a high-alloyed special steel, hardened to 65 Hfc, with high stability and
excellent surface finish for good drawing performance for steel, iron and steel-
cord. For greater draw speeds, NWS-90 is recommended.
Techna International Ltd – UK Fax: +44 1923 219700
Email: Website:
Pulling-in dogs for easier drawing
Tecnosider has designed a new series of pulling-in dogs, the TEK series, for easier
and improved wire drawing. As with existing Tecnosider pulling-in dogs, the aim
was to produce an extremely tough instrument, suited to the heavy duty working
conditions under which they are used.
Features of the new model include:
Versatility and ease of use – designed for working •
on either the left or right-hand side
Pincers open simultaneously and easily when the •
lever is operated. The clamps are both fitted with
special guides
Rapid and easy replacement of clamps •
Wire inserted in the clamps runs inside the pincer •
and, when necessary, can come out of the rear of
the pincer through a specially drilled guide. This
makes it possible to insert a long enough length
of wire into the pincer to tighten the clamps on an
intact area of the wire, and so avoid working on
the part which the sharpener has worked on. This
part is fragile, and a breakage will necessitate the
operation to be repeated and valuable production
time lost.
Tecnosider Srl – Italy Fax: +39 02 545 5832
Email: Website:
A selection of wire drawing components from ❍ ❍
Naber & Wissmann GmbH
Pulling-in dogs from ❍ ❍
Tecnosider