External circular grinding

Typical for external circular grinding are very short contact periods between the material processed and the grinding wheel. This means low grinding heat, favourable cooling, and easy receipt of the chips into the pores of the grinding wheel. Therefore, cutting speed may be higher than the speed of surface grinding. During longitudinal circular grinding the workpiece is driven along the grinding wheel by means of the longitudinal feed of the tool slide. For cylindrical workpieces the grinding wheel is to slightly exceed the end of a hub, since, otherwise the workpiece end’s diameter remains larger. Long and slim workpieces bend under the grinding pressure and need to be supported by steady rests. Longitudinal feed is to be about 3/4 of the wheel’s breadth when rough grinding, and about 1/3 of the wheels breadth when finishing. During crosswise circular grinding, the cutting depth is to be continuously adapted up to achieving the required measurement of the workpiece. The grinding wheel is slightly broader than the workpiece, so that the longitudinal feed is omitted and the effective grain number may be very large. This allows a large material removal rate during circular and profile grinding. Grinding pressure and grinding efficiency require particularly stiffly built circular grinding machines and limit the application of crosswise circular grinding to series production.

MeasurementsMeasurements for external circular grinding between centres:

250x25x76, 300x25x127, 300x32x127
350x25x127, 350x50x127, 400x20x127
400x30x127, 400x40x127, 400x50x127
450x40x127, 450x40x203,2
450x63x127, 450x63x203,2
SpecificationsFor universal application of steel of altering quality and hardness:
EKW 60K8V, EKW 80K8V
EKR 60K8V, EKR 80K8V

For high alloyed, hardened steel up to 63 HRC:
EKK 60K8V, EKK 80K8V

Werkzeugschleifen. Flachschleifen. Rundschleifen.