OKK VP 600

$180,000 - $280,000 Updated 2026-03-16

Key Specifications

Max Spindle

12,000 rpm

Spindle Taper

CAT40

Tool Capacity

30 tools (ATC)

Table Size

700 x 500 mm (27.6 x 19.7 in)

Rapid Traverse

40 m/min

Spindle Power

50/25 HP

Overview

The OKK VP 600 is a CNC vertical machining center from OKK (Osaka Kiko Co., Ltd.), a Japanese machine tool manufacturer established in 1938 and known for producing precision VMCs and HMCs for the automotive, aerospace, and precision manufacturing industries. OKK machines are positioned above the commodity VMC segment, competing with Makino, Matsuura, and Brother in the high-rigidity, high-accuracy production machining category within Japan and in export markets where Japanese precision manufacturing standards are specified.

The VP 600 provides 600 x 450 mm table travel with a 15,000 RPM (25,000 RPM option) CAT40/BT40 spindle in a box-on-column construction that OKK employs for enhanced rigidity versus conventional C-frame VMC architecture. The over-constrained box-on-column design positions the spindle column within a box structure, reducing the thermal displacement and structural deformation that degrades machining accuracy in conventional C-frame machines during long production runs.

OKK's thermal compensation system (TCS) actively corrects for thermal growth in the spindle and machine structure using temperature sensors and empirically-derived correction models — a feature more commonly found on premium brands at significantly higher price points. For precision mold shops, die shops, and aerospace subcontractors requiring consistent dimensional accuracy across multi-hour machining programs, thermal compensation reduces the need for periodic trial cuts and re-measurement.

At $180,000-$280,000, the VP 600 is positioned in the upper mid-range VMC segment — above Haas VF-3 pricing but below DMG Mori DMF premium. In North America, OKK is distributed through Methods Machine Tools, which provides application support and service.

Full Specifications

Parameter	Value
Table Size	700 x 500 mm (27.6 x 19.7 in)
Table Traverse X	600 mm (23.6 in)
Saddle Traverse Y	450 mm (17.7 in)
Spindle Head Z	510 mm (20.1 in)
Spindle Speed	15,000 RPM (25,000 RPM option)
Spindle Taper	CAT40
Spindle Motor Power	50/25 HP
Tool Capacity	30 tools (ATC)
Rapid Traverse Rate	40 m/min
Positioning Accuracy	± 0.003 mm
Repeatability	± 0.002 mm
Thermal Compensation	OKK TCS (active thermal correction)
CNC Control	Fanuc 31iM
Machine Weight	23,100 lbs (10,500 kg)
X Axis Travel	44.1" (1120mm)
Y Axis Travel	24.0" (610mm)
Z Axis Travel	18.1" (460mm)
Table Top To Spindle Nose	5.9" - 24.0" (150mm - 610mm)
Table Work Surface Area	51.2" x 24.0" (1300mm x 610mm)
Table Load Capacity	2640 lbs (1200 kg)
Rapid Traverse Rate X Y	1890 in/min (48 m/min)
Rapid Traverse Rate Z	1417 in/min (36 m/min)
Cutting Feed	1417 in/min (36 m/min)
Max Spindle Speed	12,000 rpm
Standard Number Of Tools	20 (OP: 30, 40, 60, 80, 120)
Maximum Tool Weight	15.4 lbs (7 kg)
Maximum Tool Length	11.8" (300 mm)
Maximum Tool Diameter	ø 3.2" (82 mm) / ø 4.9" (125 mm) without adjacent tool
Tool Changing Time Tool To Tool	1.2 sec
Machine Control	FANUC F31i-B

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

Strengths & Limitations

Strengths

Box-on-column structure provides enhanced rigidity and thermal stability versus conventional C-frame VMC architecture
Active thermal compensation system (TCS) maintains dimensional accuracy across multi-hour production machining programs
± 0.002 mm repeatability enables consistent part quality on mold components, aerospace brackets, and precision prismatic parts
15,000 RPM standard spindle with 25,000 RPM option covers aluminum aerospace HSM through hardened steel mold finishing
OKK's Japanese precision manufacturing heritage provides quality standards above the commodity VMC segment

Limitations

$180K-$280K pricing puts the VP 600 above Haas VF-3 and comparable Doosan/Hyundai WIA machines with similar table specs
OKK's North American dealer network is limited to Methods Machine Tools — not as dense as Haas or Mazak service coverage
OKK brand recognition is lower than Makino, DMG Mori, or Mazak in North America — affects resale value considerations
30-tool ATC may be limiting for complex mold programs with large tooling sets

Best For

Precision mold shops seeking above-commodity VMC accuracy for cavity insert and electrode machining with thermal stability Aerospace subcontractors machining aluminum and titanium structural components requiring ± 0.002 mm dimensional consistency Die shops machining hardened progressive die components requiring consistent accuracy across long programs Japanese tier-1 automotive suppliers operating to Japanese OEM specification requirements that include OKK as an approved machine Job shops seeking a step up from commodity VMC accuracy for premium customer work without full premium brand pricing

Frequently Asked Questions

01 What is the OKK TCS thermal compensation system?

OKK's TCS (Thermal Compensation System) uses multiple temperature sensors located at key positions on the machine structure — spindle housing, column, base, ballscrews — to monitor thermal state during machining. The measured temperatures feed into empirically-derived correction models that predict the dimensional displacement caused by thermal growth at each sensor location. The CNC control applies these predictions as offset corrections to the machine axes in real-time, compensating for the dimensional errors that would otherwise develop as the machine warms up from cold start.

02 How does the VP 600 box-on-column design differ from a standard C-frame VMC?

A standard C-frame VMC has a single column that supports the spindle head, creating an asymmetric structure that deflects under cutting forces and thermal loading. OKK's box-on-column design encloses the spindle column within a box structure, constraining it on multiple sides and significantly reducing column deflection under cutting force and thermal distortion during long programs. The trade-off is a heavier machine (8,000 kg versus 5,000-6,000 kg for equivalent C-frame machines) and higher manufacturing cost, both of which are justified for precision applications.

03 Is the VP 600 suitable for graphite electrode milling?

With the 25,000 RPM spindle option and appropriate sealing on the linear guides, the VP 600 can mill graphite electrodes. However, OKK's VP 600 is not a dedicated graphite machine — it lacks the specialized dust collection integration of purpose-built graphite machines like GF Machining Solutions' HSM Graphite or Makino's graphite-optimized VMCs. For shops running primarily graphite, a dedicated graphite machining center is preferable. For shops that run occasional graphite alongside steel and aluminum work, the VP 600 with 25K spindle is adequate with proper housekeeping.