Okuma LB2000 EX III
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
Max Workpiece ⌀
Max Turn Length
Accuracy
Overview
The Okuma LB2000 EX III is the third generation of Okuma's compact premium turning center, refined through decades of real-world production feedback. The EX III designation signals upgrades to spindle bearings, thermal compensation algorithms, and control software over the EX II. It's Okuma's answer for shops that need maximum precision and rigidity in a small-footprint lathe.
Max turning diameter is 250 mm (9.8 in) with a swing over bed of 400 mm (15.7 in). Standard turning length is 300 mm (11.8 in), with options to 500 mm (19.7 in) and 750 mm (29.5 in). The main spindle delivers 15/11 kW (20/15 hp) at up to 5,000 RPM through a JIS A2-6 spindle nose. Bar capacity is 54 mm (2.1 in) on the standard bore. The 8-inch chuck is standard, providing solid workholding for the machine's target part range.
The LB2000 EX III uses Okuma's box way construction on both X and Z axes, providing inherent damping and rigidity that linear guide machines in this size class struggle to match. This shows up in tool life and surface finish, particularly on interrupted cuts and hard materials. The 12-station turret with BMT mounting is available on M/MY/MYW variants, with driven tool speeds up to 6,000 RPM.
Okuma's OSP-P300L control integrates Thermo-Friendly Concept, Collision Avoidance System, and Machining Navi for vibration-free cutting parameter optimization. Rapid traverse rates are 25 m/min on X and 30 m/min on Z. The machine weighs approximately 4,200 kg (9,259 lb), giving it thermal mass that contributes to stability.
The LB2000 EX III sits between the value-oriented GENOS L2000-e and the larger LB3000 EX III in Okuma's lineup. It competes with the DMG Mori NLX 1500, Mazak Quick Turn 200, and Haas ST-15 in the compact premium turning segment. Shops choosing the LB2000 EX III over the GENOS are buying heavier castings, tighter tolerances, and the full LB-series option catalog. Specs sourced from Okuma published data.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 250 mm (9.8 in) |
| Max Turning Length | mm |
| Swing Over Bed | 400 mm (15.7 in) |
| Max Spindle Speed | 5,000 RPM |
| Spindle Motor Power | 15/11 kW (20/15 hp) |
| Spindle Nose | JIS A2-6 |
| Chuck Size | 8 in (210 mm) |
| Bar Capacity | 54 mm (2.1 in) |
| Turret Stations | 12 |
| X Axis Travel | 170 mm (6.7 in) |
| Z Axis Travel | 380 mm (15 in) |
| Rapid Traverse Rate | 25 m/min X, 30 m/min Z |
| Positioning Accuracy | ±0.004 mm |
| Repeatability | ±0.002 mm |
| Machine Weight | 4,200 kg (9,259 lb) |
| CNC Control | Okuma OSP-P300L |
| Max Workpiece Diameter | mm |
| Speed Range | 45~6,000 |
| Rapid Traverse X Z | 25/30 |
| Standard Power | 11/7.5 |
| Okuma Global Repair Center | Charlotte, North Carolina |
| Inches | Metric |
| Max Machining Diameter | 430 |
| Max Machining Length | 300 |
| Spindle Nose Type | STD Ø140 |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Third-generation refinement brings upgraded spindle bearings and improved thermal compensation over the EX II
- Box way construction on both axes provides superior rigidity and vibration damping for interrupted cuts and hard materials
- BMT turret mounting on M/MY/MYW variants delivers more rigid milling than VDI alternatives
- Machining Navi optimizes cutting parameters in real-time to eliminate chatter, extending tool life
- ±0.002 mm repeatability enables consistent precision production across extended runs
- Comprehensive option catalog including sub-spindle, Y-axis, bar feeder prep, and ARMROID robot integration
Limitations
- Starting at $120K, it's substantially more expensive than the GENOS L2000-e for similar basic turning specs
- 250 mm max turning diameter limits part size; shops with larger work should consider the LB3000 EX III
- 54 mm bar capacity is adequate but not class-leading for an 8-inch chuck lathe
- OSP proprietary control means fewer available operators compared to Fanuc-trained machinists
- Box ways require more maintenance attention than linear guides for way lube and periodic adjustment
Best For
Frequently Asked Questions
01
New LB2000 EX III machines run $120,000-$180,000 depending on configuration. Base turning models start around $120,000-$135,000. MYW setups with Y-axis, sub-spindle, and driven tools reach $165,000-$180,000. Previous-generation LB2000 EX II machines sell used for $60,000-$90,000.
02
The LB2000 EX III has heavier castings, tighter accuracy specs (±0.004 vs ±0.005 mm positioning), faster rapids, MYW sub-spindle availability, and the full LB-series option catalog. The GENOS L2000-e costs less and covers basic turning needs well. Choose the LB for maximum precision and capability; choose the GENOS for value.
03
The EX III generation brought upgraded spindle bearing preload for better thermal stability, refined Thermo-Friendly algorithms, updated OSP-P300L control software with improved Machining Navi, and structural improvements to the headstock casting. Most shops report measurably better thermal stability and surface finish consistency.
04
The MYW configuration with Y-axis, sub-spindle, and BMT live tooling at 6,000 RPM handles many mill-turn parts in a single setup. Cross-drilling, tapping, flat milling, and keyway cutting are all feasible. Heavy 3D milling or large face milling still needs a dedicated VMC or full multitasking machine like the Okuma MULTUS.
05
Box ways require periodic way lube system maintenance and occasional scraping during rebuilds, which linear guide machines avoid. However, box ways last longer under heavy cutting loads and maintain geometric accuracy better over decades. Most Okuma dealers recommend annual way inspections and lube system checks.
Videos
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Community Discussions
Pricing and buying discussion — What are your experience with okuma machines? :
Community discussion — Okuma manuals : r/Machinists - Reddit
Community discussion — Okuma...Love or Hate? : r/Machinists - Reddit
Comparison and buying advice — Okuma LB3000EX-II vs. Genos L3000 : r/Machinists - Reddit
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