EMAG G 500 H

The EMAG G 500 H is a large gear grinding machine, taking workpieces up to 500 mm (19.5 in) in diameter and 1,250 mm (49 in) long, with modules from 0.5 - 22.0 mm. Its tool spindle is rated 20 kW (27 hp) and reaches 32,500 rpm, and the machine itself weighs 15,000 kg (33,069.5 lb).

Its module range reaches further than that of the G 375 H, which stops at 15.0 mm. A 22.0 mm module is very coarse gearing, the size used in heavy industrial drives, while 0.5 mm is fine pitch; one machine covering both lets a shop grind a mixed part list without splitting it across machines. Center distance runs from 20 - 445 mm (1 - 17.5 in), which is what lets the tool reach both a small root diameter and the outside of a large gear.

Spindle choice is the other distinguishing row. The table lists 5 standard configurations for the external spindle and 4 configurations for an internal spindle, the internal set being optional. With an internal spindle fitted, internal gears and bores can be ground on the same machine; without it, the G 500 H is an external grinder. Which of the external configurations suits a job depends on the wheel and speed each carries, and the table does not break those down, so ask EMAG for the configuration list.

Two limits deserve attention. Workpiece weight is listed at 350 kg (771.5 lb), the same as the smaller G 375 H, so a long, large-diameter steel part can reach the weight limit before it reaches the size limit. And at 15,000 kg (33,069.5 lb) the machine needs a prepared foundation. The table lists no control.