External cylindrical grinding machine JUMAT

internal cylindricalworkpieceCNC

Quality, productivity, availability – the JUMAT external and internal cylindrical grinding machine leaves nothing to be desired. Various sizes and a large number of wheelhead versions offer unrivaled versatility. Paired with the concentrated expertise of JUNKER, each machine is specially matched to the customer‘s requirements. Highlights High dimensional accuracy thanks to various measuring systems Long tool life through use of CBN or diamond grinding wheels Versatility due to a large number of wheelhead versions Minimized undulations due to grinding wheel balancing on two levels Fast changeover through patented 3-point mounting interface The cylindrical grinding machines of the JUMAT series can perform both OD and ID grinding in a single clamping set-up. CBN and diamond grinding wheels enable high-speed grinding, provide for high cutting performance and enable grinding of difficult materials. EXTERNAL CYLINDRICAL GRINDING During external cylindrical grinding, the workpieces are clamped between tips or in a collet chuck. To increase productivity, grinding wheel sets are used for some applications. The JUMAT uses the straight and inclined plunge-cut grinding process. With straight plunge-grinding, the cutting and feed movement is carried out radially to the workpiece. The diameters are ground either in one feed or with several feeds and axial twisting. With inclined plunge-cut grinding, the grinding wheel is at an angle and the wheelhead (B-axis) is swiveled. The X and Z-axis interpolate. This makes it possible to grind the diameter and flat surfaces in a single feed. To grind grooves or to pre-grind threads, a galvanically bonded grinding wheel is usually used.