Okuma MB-46V II

$110,000 - $145,000 Updated 2026-03-13

Key Specifications

X Travel

560 mm (22.0 in)

Y Travel

460 mm (18.1 in)

Z Travel

460 mm (18.1 in)

Max Spindle

min⁻¹

Spindle Taper

BT 40

Tool Capacity

20 (standard); 32, 48, or 98 optional

Overview

The Okuma MB-46V II is the second generation of Okuma's compact box-way vertical machining center, representing a refinement of the original MB-46V with improved thermal management, updated control technology, and enhanced rigidity. With 560 x 460 x 460 mm (22.0 x 18.1 x 18.1 in) of travel, it shares the same compact envelope as the MB-46VAE but with full premium features.

The standard spindle configuration delivers 8,000 RPM with 11/7.5 kW (15/10 hp) through a BT 40 taper, with optional speeds up to 15,000, 20,000, 25,000, or 35,000 RPM. The range of spindle options allows shops to configure the MB-46V II precisely for their material mix, from heavy steel roughing at 6,000 RPM to high-speed graphite electrode machining at 35,000 RPM.

Box-way construction on all three axes is the MB series hallmark. The hand-scraped sliding surfaces provide exceptional vibration damping that directly translates to better surface finish and longer tool life during heavy cuts. The second-generation design refines the way geometry for improved stick-slip behavior at low feed rates, critical for precision contouring operations in mold and die work.

The 20-tool ATC is expandable to 32, 48, or 98 tools. The 760 x 460 mm (29.9 x 18.1 in) table handles typical job shop workpieces with a 500 kg load capacity. Okuma's Thermo-Friendly Concept and Collision Avoidance System are standard.

The OSP-P300A control (upgradeable to P500 on some configurations) offers both conversational and EIA/ISO programming. The second-generation machine added improved servo tuning for better surface finish during complex contouring, particularly noticeable in mold cavity finishing operations.

New MB-46V II machines run $110,000-$145,000. The Mark II commands a premium over the MB-46VAE for its refined construction and full feature set. Used units from 2015-2020 sell for $60,000-$85,000.

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	min⁻¹
Spindle Taper	BT 40
Spindle Motor Power	hp
Tool Capacity	20 (standard); 32, 48, or 98 optional
Table Size	460 x 760
Max Table Load	500 kg (1,102 lb)
Rapid Traverse Rate	42/36
Positioning Accuracy	±0.004 mm
Repeatability	±0.002 mm
Machine Weight	4,800 kg (10,582 lb)
CNC Control	OSP-P300A
Guide Type	Box ways (all axes, hand-scraped)
Max Machining Volume	560 x 460 x 460
Spindle Motor Power Low Range	22/18.5 [11/7.5]
Okuma Global Repair Center	Charlotte, North Carolina
Inches	Metric
Spindle Speed	15,000 [6,000]
Spindle Motor Power	15/10 [30/25]
Magazine Capacity	20 [32, 48]

Specifications sourced from okuma.com — verified 2026-03-28

Strengths & Limitations

Strengths

Second-generation box-way design with refined way geometry for improved low-feed-rate contouring
Wide spindle speed range from 8K to 35K RPM options covers heavy roughing through high-speed finishing
Hand-scraped box ways deliver superior vibration damping versus roller-guide machines in this class
Improved servo tuning over Mark I for better surface finish during complex mold cavity finishing
Thermo-Friendly Concept and Collision Avoidance System are standard, not optional extras
Expandable 20-to-98 tool magazine adapts from simple job shop work to complex multi-tool operations
Heavy one-piece casting provides long-term geometric accuracy that lighter machines can't match

Limitations

560 mm X-travel limits workpiece size; larger parts need the MB-56V or MB-66V
Starting at $110K, it costs $15-20K more than the economy MB-46VAE for the same travel envelope
Box-way rapids at 32 m/min are slower than 40+ m/min on roller-guide competitors
Standard 8K RPM spindle requires costly upgrades for aluminum-heavy shops
20-tool standard magazine is tight for shops running complex multi-operation parts

Best For

Mold and die shops requiring exceptional surface finish from a compact box-way VMC Precision machining operations in hardened steels where vibration damping is critical Shops upgrading from first-generation MB-46V machines wanting improved contouring performance Graphite electrode machining operations using the 25K or 35K RPM spindle options Tool and die makers producing injection mold cavities and cores with tight surface finish requirements Aerospace component shops machining small titanium and Inconel parts requiring rigidity

Frequently Asked Questions

01 What does an Okuma MB-46V II cost new?

New MB-46V II machines run $110,000-$145,000 depending on spindle option and tool magazine size. High-speed spindle configurations (20K+ RPM) and the 98-tool magazine push toward the upper range. Used Mark II units from 2015-2020 sell for $60,000-$85,000.

02 What's the difference between the MB-46V II and MB-46VAE?

The MB-46V II is the full-featured premium version, while the MB-46VAE is an economy variant. Both share box-way construction and the same travel envelope. The Mark II offers refined way geometry, improved servo tuning for better surface finish, and typically includes more standard features. The VAE saves $15-20K by simplifying some features.

03 Is the MB-46V II good for graphite electrode machining?

Excellent choice with the 25K or 35K RPM spindle option. The box-way construction handles the interrupted cutting in graphite without chatter, and the high spindle speed produces fine surface finish on electrode details. Many mold shops pair the MB-46V II with a graphite dust collection system for this application.

04 How does the MB-46V II compare to the DMG Mori CMX 50 U?

Different philosophies: the MB-46V II uses box ways for heavy-cut damping, while the CMX 50 U uses roller guides for speed. The Okuma has better surface finish potential in heavy cuts. The DMG Mori offers faster rapids and 5-axis capability in the U variant. For mold work in hardened steel, the Okuma wins. For high-speed 5-axis, the DMG Mori is more versatile.