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Cylindrical grinding

JUNKER cylindrical grinding machines enable extremely efficient grinding processes with a high degree of process reliability, the ultimate in workpiece quality and a optimum cost-to-performance ratio across a wide range of industries.

As JUNKER has developed different cylindrical grinding machines which each have their own specific benefits, individual customer requirements can be addressed in detail. For instance we are able to develop space-saving solutions, machines with ultra-short cycle times or solutions involving ultra low-wear CBN or diamond grinding bodies just millimeters in thickness. It’s often possible to completely grind a workpiece in a single clamping set-up, which offers added time savings.

External cylindrical grinding

During external cylindrical grinding, the workpieces are clamped between tips or in a collet chuck. To further enhance productivity, grinding wheel sets are used for some applications. Currently popular methods of external cylindrical grinding are straight and inclined plunge-cut grinding. With straight plunge-cut 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.

Internal cylindrical grinding

Internal cylindrical grinding enables precise grinding of inside functional surfaces, such as drilled holes, cones or flat surfaces. High-speed grinding spindles are used to achieve the desired cutting speed, despite the smaller grinding wheel diameter.


Erwin Junker Maschinenfabrik GmbH
Junkerstraße 2
77787 Nordrach