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Grinded, high quality hardened steel.
Hardalloy is an extremely hard, wear-resistant, corrosion-resistant coating with very good tribological properties.
A higher friction is achieved with a Hardalloy coating than with a ground roller.
Hardalloy rollers lose their high friction over time and become smooth. However, these rollers can be machined again in the Hardalloy process and then regain their original roughness.
TOPOCROM® is a process for the production of structured surfaces (reactor coating). Individually adjustable surface topographies are available depending on industrial requirements.
A hemispherical structure is formed on the coated surface. This surface offers great advantages in sheet metal forming. Adhesion between the mould and the sheet metal is reduced, and adhesion and welding effects are avoided.
The indentations between the ‘hemispheres’ also create hydrostatic lubrication pockets. The Topocrom surface ensures uniform wettability with lubricant.
Topocrom has very hard properties and increases the friction coefficient of the roller. If the roller surface wears over time, the coating can be renewed.
Available for the following roll feeds:
On the R devices (EV DR, EV RE, EV RF, EV RX) the rolls are interchangeable with the standard rolls.
