EMAG G 375 H

The EMAG G 375 H is a gear grinding machine for large gears, rated for workpieces up to 375 mm (15 in) in diameter, 870 mm (34.5 in) long and 350 kg (771.5 lb) in weight, with modules from 0.5 - 15.0 mm and a maximum profile depth of 35 mm (1.4 in). The tool spindle is rated 23 kW (31 hp) and turns to 18,000 rpm.

The profile depth and module range define the work. A module of 15.0 mm is coarse industrial gearing, the kind found in heavy gearboxes and drives, and 35 mm (1.4 in) of profile depth gives room for the tall teeth that come with it. At the other end, 0.5 mm keeps fine-pitch parts within reach of the same machine, though a shop grinding only small gears would leave most of the envelope unused.

Center distance runs from 35 - 340 mm (1.5 - 13.5 in). That range sets how close the tool can come to the workpiece axis and how far it can back away, so it has to cover both the root of the smallest gear and the outside of the largest one on the job list. The 23 kW (31 hp) spindle is also stronger than that of the larger G 500 H, which lists 20 kW (27 hp) but a higher 32,500 rpm.

The machine weighs 11,000 kg (24,251 lb), so foundation and rigging need planning before delivery. The control is a Siemens 840 D sl. Against the G 500 H, which takes 500 mm (19.5 in) and 1,250 mm (49 in) parts up to module 22.0 mm, the G 375 H is the choice when the gears stay within 375 mm (15 in) and the higher spindle power counts.