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NTB Ceratuff Alumina & Zirconia Wire Drawing Tools
NTB HITECH CERAMICS designs and manufactures CERATUFF - precision, wear and corrosion resistant ceramic components for the wire and cable industry. Drawing Cones and Rings, Wire Guide Pulleys, Rolls and other Wire Guide Elements manufactured from Alumina and Zirconia ceramics, provide more efficient and economical production of quality wires, when compared to machines equipped with hardened steel, carbide and coated components. A comparison of the various wire drawing materials is shown in Table.
Table : Comparison of Various Wire Drawing Materials
PROPERTIES |
MATERIAL |
ZIRCONIA |
Alumina Zirconia |
Alumina |
Steel |
Coated Steel |
| Corrosion resistance |
Excellent |
Excellent |
Excellent |
Poor |
Fair |
| Surface finish |
Excellent |
Excellent |
Good |
Excellent |
Fair |
| Sensitivity to impact |
Good |
Fair |
Fair |
Excellent |
Fair |
| Hardness |
Excellent |
Excellent |
Excellent |
Fair |
Good |
| Moment of inertia |
Good |
Excellent |
Excellent |
Fair |
Fair |
 Material Selection : In NTB CERATUFF Alumina and Zirconia Ceramic tools, the fine surface finish, high hardness and chemical inertness to corrosion provides for longer life, reduced die wear, and better wire quality. Alumina is recommended in single or multi-groove wire guide pulleys, stationary guide elements and cones/rolls used to draw ultra-fine copper and tungsten wires. Zirconia is the first choice in drawing cones & rings, when very stringent demands are made on the toughness and wear resistance of the tool, specially in very high surface finish wires. The non-wetting, wire-compatible Zirconia surface, provides problem-less production in bare and plated copper wire, brass, aluminium, nickel, precious Metals-platinum, gold and silver, stainless steel and galvanized wires etc.
Product Design : NTB CERATUFF Wire Drawing Cones, Capstans and Pulleys use a metal/ceramic "bolt-together" composite design. The cones have machined cores and flanges which precisely locate the replaceable ceramic rings at the outer diameter. This avoids the thermal expansion mismatch between the ceramic and the metal and also protects the ceramic components from damage. Dynamic balancing is provided in high speed applications to ensure product safety and performance.
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