EMUGE offers you an extensive programme of thread rolls, worm rolls, knurling rolls and serration rolls for practically all application cases.

Process characteristics:

• Chipless process
• External machining
• Production of profile contours by material displacement
• Major diameter not fully formed
• Rolls made of high-alloyed tool steel

The use of rolling tools necessitates certain basic conditions:

• Workpiece materials with a breaking elongation ≥ 8%
• Specially adjusted blank diameters are necessary for rolling
• Special machines are necessary

The use of rolling tools offers the following advantages:

• Smooth rolled surfaces achieved by densification of the material structure
• Surface quality grade R_a2 on the rolled profile
• Increased corrosion resistance due to reduced reaction surfaces
• Uninterrupted grain structure
• Increased static and dynamic strength of the profile
• High dimensional and form precision
• Considerable material savings, since work does not start from the major diameter of the workpiece but from its pitch, or preparatory diameter
• Short machining times

This means that in effect rolled threads can be exposed to higher stress. They show a higher degree of wear resistance and are better protected against corrosion. Another advantage that deserves special attention is the improvement of economic efficiency in thread ­production achieved by the extremely short production times common in thread rolling.