Okuma LB3000 EX III

The Okuma LB3000 EX III is the third generation of Okuma's best-selling mid-size turning center, building on the LB3000 EX II platform that has over 10,000 units installed worldwide. The EX III generation brings updated spindle bearing technology, refined Thermo-Friendly algorithms, enhanced Machining Navi chatter suppression, and the latest OSP-P300L control software with improved user interface and connectivity features.

Max turning diameter is 400 mm (15.7 in) with a swing over bed of 630 mm (24.8 in). Standard turning length is 500 mm (19.7 in), with 1,000 mm (39.4 in) and 1,500 mm (59.1 in) bed options for shaft work. The main spindle delivers 22 kW (30 hp) at up to 5,000 RPM through an A2-8 nose on the standard bore model. Big bore variants reduce max speed to 4,200 RPM but increase bar capacity beyond the standard 76 mm (3 in).

The LB3000 EX III maintains the box way construction that made the platform famous. Both X and Z axes ride on hardened and ground box ways with turcite-B liners, providing the inherent damping and rigidity that production shops depend on for consistent accuracy across years of heavy use. The 12-station turret with BMT tool mounting handles both turning and driven tools at up to 6,000 RPM on M/MY/MYW variants.

Rapid traverse rates hit 25 m/min on X and 30 m/min on Z. Positioning accuracy is ±0.004 mm with ±0.002 mm repeatability. The machine weighs approximately 5,000 kg (11,023 lb) on the standard bed, providing excellent thermal mass.

Okuma's ARMROID in-machine robot arm is compatible with the EX III, enabling automated workpiece loading and unloading without an external robot cell. The Collision Avoidance System III provides 3D interference checking at control cycle speed. For shops already running LB3000 EX or EX II lathes, the EX III runs existing programs without modification while delivering measurable improvements in thermal stability and surface finish consistency. Specs sourced from Okuma published data.