Okuma V40R
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
max turning diameter
max turning height
table speed max
Overview
The Okuma V40R is a single-table vertical turning center built for high-rigidity chucking work on medium-to-large diameter parts. With a maximum turning diameter of 580 mm (22.8 in) and a maximum turning height of 380 mm (15.0 in), it fills the gap between Okuma's inverted-spindle V-series production machines and the larger VTM multitasking platforms. The R designation indicates the robust table-drive design optimized for heavy cutting in cast iron, carbon steel, and alloy steel.
The table spindle delivers 30/22 kW (40/30 hp) at a maximum speed of 1,500 RPM with 500 Nm (369 ft-lb) of torque. That torque rating lets the V40R take aggressive roughing cuts in large-diameter cast iron housings and steel flanges without bogging down. The 15-inch hydraulic chuck is standard, with options up to 18 inches for shops that need more clamping diameter on odd-shaped castings.
The 12-station VDI 50 turret handles heavy-duty OD and ID tools, with optional driven tools adding cross-drilling and milling capability. X-axis travel is 320 mm (12.6 in) and Z-axis travel is 430 mm (16.9 in), with rapids at 24 m/min. The machine uses box guideways on both axes for maximum vibration damping during interrupted cuts on rough castings.
Okuma's Thermo-Friendly Concept is standard, continuously compensating for thermal growth in the spindle, column, and bed. The OSP-P300L control includes Collision Avoidance System and the THINC API for integration with shop-floor monitoring systems. The machine weight of approximately 12,000 kg (26,455 lb) contributes to the vibration damping that makes the V40R effective on interrupted cuts.
The V40R competes with the Doosan Puma VT950M, Hwacheon VT-650R, and DMG Mori CTV 315. Pricing runs $250,000-$380,000 new. It targets job shops and production facilities machining castings, forgings, and flanged components up to 580 mm diameter. Shops doing oil and gas valve bodies, pump housings, and heavy equipment components are the primary buyers.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 580 mm (22.8 in) |
| Max Turning Height | 380 mm (15.0 in) |
| Table Speed Max | 1,500 RPM |
| Spindle Motor Power | 22/18.5 |
| Spindle Torque | 500 Nm (369 ft-lb) |
| Chuck Size | 381 mm (15 in) hydraulic, optional 457 mm (18 in) |
| Turret Type | VDI 50, 12-station |
| X Axis Travel | 320 mm (12.6 in) |
| Z Axis Travel | 430 mm (16.9 in) |
| Rapid Traverse Rate | 24 |
| Guideway Type | Box guideways (X and Z) |
| Max Workpiece Weight | 300 kg (661 lb) |
| Machine Weight | 12,000 kg (26,455 lb) |
| CNC Control | Okuma OSP-P300L |
| Max Cutting Diameter | Ø400 |
| Max Cutting Length | 450 |
| Swing Over Bed | mm |
| Max Spindle Speed | min⁻¹ |
| Okuma Global Repair Center | Charlotte, North Carolina |
| Inches | Metric |
| Max Swing | Ø500 |
| Spindle Speed | 25~2,500 |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Box guideways on both axes provide superior vibration damping for interrupted cuts on rough castings and forgings
- 500 Nm spindle torque enables aggressive roughing in cast iron and steel without bogging down, even at large diameters
- Thermo-Friendly Concept maintains accuracy during long production runs where thermal growth would otherwise require offset adjustments
- 12,000 kg machine weight contributes to vibration damping, making the V40R noticeably more rigid than lighter vertical lathes in this class
- VDI 50 turret with driven tool option adds cross-drilling and milling capability to reduce secondary operations
- Collision Avoidance System protects against crashes during setup of irregularly shaped castings and forgings
Limitations
- 1,500 RPM maximum table speed limits surface footage on smaller-diameter aluminum work where higher speeds are needed
- Box guideways trade some rapid traverse speed for rigidity; 24 m/min rapids are slower than roller-guideway machines at 30+ m/min
- OSP control is Okuma-proprietary with no Fanuc or Siemens alternative for shops with standardized control platforms
- 12,000 kg weight requires a solid floor slab and may complicate installation in shops without adequate foundation capacity
Best For
Frequently Asked Questions
01
A new V40R typically runs $250,000-$380,000 depending on chuck size, driven tool options, and automation peripherals. Used machines from 2015-2020 trade in the $120,000-$200,000 range depending on hours and condition.
02
The V100R is the larger version with a maximum turning diameter of 1,050 mm versus 580 mm on the V40R. The V100R also has more spindle power (45/37 kW vs 30/22 kW) and a larger chuck capacity. The V40R is the right choice for parts under 580 mm where its smaller footprint and lower cost are advantages.
03
Box guideways provide superior vibration damping compared to linear roller guides, which matters on interrupted cuts found in rough castings. The trade-off is slightly slower rapid traverse speeds. For the V40R's target applications of heavy turning on castings and forgings, the rigidity advantage outweighs the speed penalty.
04
Yes, the combination of box guideways, 12,000 kg machine weight, and 500 Nm spindle torque makes the V40R well-suited for rough castings with interrupted cuts. The vibration damping from box ways prevents chatter that would degrade surface finish and tool life on interrupted surfaces.
05
The standard chuck is 381 mm (15 in) hydraulic. An 457 mm (18 in) option is available for shops that need more clamping diameter on larger or irregularly shaped workpieces. Both options use Okuma's standard hydraulic clamping system.
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