Okuma GENOS L400II

The Okuma GENOS L400II is a turning center with 330 mm (12.99 in) of maximum turning diameter and 500 mm (19.69 in) of maximum turning length on a JIS A2-8 spindle nose. It turns a wider part than either the GENOS L250II at 280 mm (11.02 in) or the GENOS L2000-e at 230 mm (9.06 in).

Nose size is the first thing that separates it from those two. Both the GENOS L250II and the GENOS L2000-e are listed with a JIS A2-6 nose. An A2-8 nose accepts larger chucks and gives a stiffer mounting for heavy workpieces, which fits a machine meant for parts up to 330 mm across.

Power does not grow with the nose. Okuma lists the spindle motor at 11 kW (15 hp) for 30 min and 7.5 kW (10 hp) continuous, with a speed range of 30–3,000 rpm. That is the same 11 kW (15 hp) as the GENOS L250II and less than the 15 kW (20 hp) of the GENOS L2000-e. In practice this is a machine for moderate depths of cut on medium-sized parts: heavy roughing at the full 330 mm diameter will reach the 7.5 kW continuous figure long before it reaches the edge of the envelope. The 3,000 rpm ceiling also keeps surface speed down on small diameters.

Rapid traverse is listed as 20 / 30 m/min (66 / 98 fpm). Okuma's headline rows for this model end there. Chuck size, bar capacity, turret stations and weight are not among them, so take those from the quotation.