Okuma MB-46VAE
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The Okuma MB-46VAE is a compact, high-rigidity vertical machining center from Okuma's premium MB-V series, designed as an economical entry point into Okuma's box-way VMC lineup. With 560 x 460 x 460 mm (22.0 x 18.1 x 18.1 in) of travel, it targets shops that prioritize cut quality and surface finish over work envelope size.
The standard spindle turns 8,000 RPM with 11/7.5 kW (15/10 hp) through a BT 40 taper. Optional spindle configurations reach 15,000, 20,000, 25,000, or even 35,000 RPM for high-speed mold and die finishing. This range of spindle options on a single platform is unusual in this size class and makes the MB-46VAE adaptable from heavy steel roughing to high-speed aluminum finishing.
The defining feature of the MB-46VAE is its box-way construction on all three axes. Where most machines in this price range use roller guides, Okuma uses hand-scraped box ways that provide superior vibration damping during heavy cuts. This translates directly to better surface finish in steel and cast iron, and longer tool life on interrupted cuts. The tradeoff is slower rapid traverse compared to roller-guide machines, but for the MB-46VAE's target market of precision and quality, that's an acceptable compromise.
The 760 x 460 mm (29.9 x 18.1 in) table with a 20-tool ATC (expandable to 32, 48, or 98 tools) handles job shop variety. The OSP-P300A control provides conversational programming and Okuma's Collision Avoidance System. Thermo-Friendly Concept is standard, maintaining accuracy across temperature changes.
New MB-46VAE machines run $95,000-$125,000. The 'E' designation indicates an economy variant with slightly simplified features compared to the full MB-46VA, making it Okuma's most accessible box-way VMC. Competitors include the Mori Seiki NV5000 (used market), Haas VF-2SS, and Mazak VCN-430A.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 560 mm (22.0 in) |
| Y-Axis Travel | 460 mm (18.1 in) |
| Z-Axis Travel | 460 mm (18.1 in) |
| Max Spindle Speed | 8,000 RPM (standard); 15,000 / 20,000 / 25,000 / 35,000 RPM optional |
| Spindle Taper | BT 40 |
| Spindle Motor Power | 11/7.5 kW (15/10 hp) standard; 22/18.5 kW (30/25 hp) optional |
| Tool Capacity | 20 (standard); 32, 48, or 98 optional |
| Table Size | 760 x 460 mm (29.9 x 18.1 in) |
| Max Table Load | 500 kg (1,102 lb) |
| Rapid Traverse Rate | 32 m/min (X/Y); 24 m/min (Z) |
| Positioning Accuracy | ±0.004 mm |
| Repeatability | ±0.002 mm |
| Machine Weight | 4,600 kg (10,141 lb) |
| CNC Control | OSP-P300A |
| Guide Type | Box ways (all axes, hand-scraped) |
| Okuma Global Repair Center | Charlotte, North Carolina |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Hand-scraped box-way construction on all axes provides superior vibration damping for heavy cuts in steel and cast iron
- Wide spindle speed range from 8K to 35K RPM options covers everything from heavy roughing to high-speed finishing
- Thermo-Friendly Concept standard maintains dimensional accuracy through temperature fluctuations
- Collision Avoidance System (CAS) prevents costly crashes during setup and programming
- Expandable tool magazine from 20 to 98 tools scales with shop complexity needs
- Economy variant pricing makes Okuma box-way quality accessible to smaller shops
- Japanese build quality with heavy one-piece casting provides long-term positional accuracy
Limitations
- 560 mm X-travel is compact; shops needing more envelope should consider the MB-56V or MB-66V
- Standard 8,000 RPM spindle is slow for aluminum work; high-speed options add significant cost
- Box ways deliver slower rapid traverse than roller-guide competitors, extending non-cutting time
- 20-tool standard magazine is minimal for complex parts; upgrading the ATC adds cost
- OSP control has fewer third-party training resources than Fanuc or Haas controls
Best For
Frequently Asked Questions
01
New MB-46VAE machines run $95,000-$125,000. The economy designation keeps the base price below the full MB-46VA. High-speed spindle options, expanded tool magazines, and through-spindle coolant push toward the upper range. Used MB-46V series machines from 2014-2019 sell for $50,000-$75,000.
02
The 'E' designation indicates an economy variant with slightly simplified features. The core machine structure, box-way construction, and spindle platform are the same. The MB-46VA may include additional standard features that are optional on the VAE. Both use the same OSP control and Thermo-Friendly Concept.
03
Box ways provide superior vibration damping during heavy interrupted cuts, resulting in better surface finish and longer tool life in steel and cast iron. Roller guides are faster in rapids and acceleration. If your work is mostly heavy cutting in ferrous metals, box ways are the better choice. For high-speed aluminum work, roller guides are preferred.
04
With the optional 15K-35K RPM spindles, yes. The standard 8K RPM spindle is designed for heavy cutting. The box-way construction with high-speed spindles creates an unusual but effective combination for shops doing precision mold finishing that also need occasional heavy roughing capability.
05
Both target the compact VMC segment. The Haas VF-2SS offers 12K RPM standard and inline direct-drive spindle with more X travel (762 vs 560 mm). The Okuma has hand-scraped box ways vs roller guides on the Haas, giving better vibration damping. The Haas costs less starting around $85K. Choose the Okuma for cut quality, the Haas for speed and value.
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Community Discussions
Community discussion — Okuma MB46VAE G-code question : r/Machinists - Reddit
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