Okuma MILLAC 561V II

$155,000 - $200,000 Updated 2026-03-13

Key Specifications

X Travel

1,050 mm (41.3 in)

Y Travel

560 mm (22.0 in)

Z Travel

560 mm (22.0 in)

Max Spindle

min⁻¹

Spindle Taper

BT 40

Tool Capacity

36 (standard); 54 optional

Overview

The Okuma MILLAC 561V II is a mid-range model in Okuma's heavy-duty MILLAC V II series, specifically engineered for mold and die shops that need a larger work envelope than the compact MILLAC 44V II. With 1,050 x 560 x 560 mm (41.3 x 22.0 x 22.0 in) of travel, it handles medium-sized mold bases and die components with the rigidity these applications demand.

The spindle platform offers remarkable flexibility: standard 6,000 RPM with options extending to 8,000, 10,000, 12,000, and 15,000 RPM. The standard motor delivers 15/11 kW (20/15 hp) with an optional 22/18.5 kW (30/25 hp) upgrade. This range allows shops to configure the machine precisely for their work: 6K RPM with maximum torque for heavy roughing in mold steel, or 15K RPM for high-speed semi-finishing and finishing passes.

The MILLAC 561V II uses heavy-duty box-way construction with a thermally symmetrical headstock design that places the spindle at the thermal center of the column. This layout minimizes positional drift as the machine warms up, critical for mold work where finishing passes may occur hours after roughing and the machine's thermal state has changed significantly.

The 1,300 x 560 mm (51.2 x 22.0 in) table with 36-tool ATC (expandable to 54) provides production capacity for complex multi-tool mold programs. The 560 mm Z-travel gives depth for cavity work that the smaller 460 mm Z machines cannot reach.

Okuma's look-ahead contouring algorithm in the OSP-P300A control processes thousands of blocks ahead to smooth tool path transitions, critical for achieving Ra 0.2-0.4 micrometer surface finishes in hardened mold steel without post-machining polishing.

New MILLAC 561V II machines run $155,000-$200,000. Competitors include the Makino S56, Roku Roku HC-1000, and YCM FV-56A.

Full Specifications

Parameter	Value
X-Axis Travel	1,050 mm (41.3 in)
Y-Axis Travel	560 mm (22.0 in)
Z-Axis Travel	560 mm (22.0 in)
Max Spindle Speed	min⁻¹
Spindle Taper	BT 40
Spindle Motor Power	15/11 [22/18.5]
Tool Capacity	36 (standard); 54 optional
Table Size	mm
Max Table Load	900 kg (1,984 lb)
Rapid Traverse Rate	32/32/24
Positioning Accuracy	±0.003 mm
Repeatability	±0.002 mm
Machine Weight	8,500 kg (18,739 lb)
CNC Control	OSP-P300A
Guide Type	Box ways (heavy-duty, all axes)
Travel X Y Z	1,050 x 560 x 520
Max Load	1,000
Okuma Global Repair Center	Charlotte, North Carolina
Inches	Metric
Table Dimensions	1,350 x 560
Spindle Speed	30~6,000 [60~10,000; 80~12,000]

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

Strengths & Limitations

Strengths

1,050 x 560 x 560 mm travel handles medium-sized mold bases with ample depth for cavity work
Thermally symmetrical headstock design minimizes spindle position drift during long machining cycles
Heavy-duty box-way construction provides exceptional vibration damping for finish-quality surface generation
560 mm Z-travel handles deeper cavities than 460mm-Z competitors in this class
Advanced look-ahead contouring produces smooth surfaces on complex 3D mold geometry
36-tool standard magazine handles multi-operation mold programs; 54-tool option available
8,500 kg machine weight provides solid vibration isolation for extended finishing passes

Limitations

Starting at $155K, the MILLAC premium is significant over general-purpose VMCs with similar travel
Standard 6,000 RPM spindle requires upgrades for shops needing higher-speed finishing capability
Box-way rapid speeds at 30 m/min add non-cutting time compared to roller-guide production VMCs
BT 40 taper may limit tool rigidity for very heavy roughing; some mold shops prefer BT 50
Niche mold/die market positioning means lower resale liquidity than mainstream VMC brands

Best For

Mold shops producing medium-sized injection mold cavities and cores in hardened steel Die makers machining progressive and transfer stamping dies requiring deep cavity access Shops doing hard milling up to 60+ HRC that need box-way vibration damping for tool life Precision finishing operations requiring sub-micron repeatability and Ra 0.2-0.4 surface finish Electrode machining operations producing complex 3D graphite electrodes for EDM

Frequently Asked Questions

01 What does an Okuma MILLAC 561V II cost new?

New MILLAC 561V II machines run $155,000-$200,000. High-speed spindle options and the 54-tool magazine add to the base price. Used units from 2013-2018 sell for $85,000-$120,000.

02 How does the MILLAC 561V II compare to the Makino S56?

Both target the mold and die segment with similar travel envelopes. The Makino S56 uses roller guides with a high-speed spindle approach, while the MILLAC 561V II uses box ways for vibration damping. For heavy roughing and hard milling, the Okuma's box ways provide more stability. For high-speed finishing, the Makino's roller guides offer faster axis response.

03 What surface finish quality can the MILLAC 561V II achieve?

With appropriate tooling and cutting parameters, the MILLAC 561V II routinely achieves Ra 0.2-0.4 micrometers on hardened mold steel. The look-ahead contouring, thermal stability, and box-way damping all contribute. For many mold applications, this reduces or eliminates manual polishing requirements.

04 What spindle speed should I choose for mold work?

For general mold work in P20 and H13 steel, the 10,000 or 12,000 RPM option provides the best balance of speed and torque. The 6K RPM standard is ideal for heavy roughing. The 15K RPM option is best for shops that do significant high-speed semi-finishing and finishing passes. Many mold shops find 10K RPM is the sweet spot.