DIRKRA provides machines for the most diverse industrial sectors, which precisely grind rolls and knives of the most varied dimensions and applications under program control. The pick-up and delivery service guarantees low downtimes and fast delivery of your newly ground roll and knife parts. Our range of services extends from the grinding of your back-up rolls to cold and hot rolls, rubber rolls and embossing rolls. Rolls in dimensions up to 1,500 mm diameter, a total length of 5,500 mm and a mass of 30,000 kg are in our processing spectrum. In addition, industrial knives ranging from scrapping rubber knives to triangular knives or shear blades are ground, as are rubberized ejectors, splash rings, inner rings, spacer rings, and much more. DIRKRA offers all common types of grinding from mirror polished to crowned or hollow to CVC grinding.

During hot rolling in the non-ferrous metal industry, an oxide layer (scale) is formed on the surface of the strips. This layer must be removed before further processing of the material. Helix cutters are used for this task, which simultaneously mill off the strip on the upper and lower side by approx. 0.6 mm each. The helix cutters used are high-precision tools and therefore also place extraordinary demands on regrinding. As a special highlight, our grinding centre has specialised in the regrinding of Helix cutters. The extremely hard cutting tools require a high degree of feeling and precision during machining. Thanks to many years of experience and excellent machinery, DIRKRA has achieved an outstanding market position in this specialist field.