Hyundai WIA KF-50 II Series
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Table Size
Overview
The Hyundai WIA KF-50 II Series is a second-generation high-speed vertical machining center from Hyundai WIA's KF lineup, built for shops that need fast cycle times on aluminum, steel, and light alloy parts. The II-Series designation signals meaningful upgrades over the original KF-50, including improved spindle thermal management, faster ATC sequences, and refined guideway geometry for better surface finish at high feed rates.
The KF-50 II provides axis travels of 1,020 x 510 x 510 mm (40.2 x 20.1 x 20.1 in) with a 1,200 x 510 mm (47.2 x 20.1 in) T-slot table rated for 800 kg (1,764 lb). The HSK-A63 direct-drive spindle turns at 12,000 RPM standard, with 15,000 and 20,000 RPM options available for aluminum-intensive applications. Rapid traverse rates of 48 m/min (1,890 ipm) on all axes keep non-cutting time to a minimum on complex multi-tool programs.
Linear roller guideways on all three axes deliver the combination of speed, rigidity, and long service life that production environments demand. The 30-tool servo-driven arm-type ATC provides fast, reliable tool changes, with 40-tool expansion available. The FANUC 0i-MF Plus control is standard, providing nano-interpolation for smooth surface finishes and full macro support.
At $110,000-$160,000 new, the KF-50 II Series sits in the competitive mid-size VMC segment against the Haas VF-3, Doosan DNM 5700, and Mazak VCN-530C. The HSK-A63 spindle interface as standard is a significant differentiator at this price point, providing better high-speed rigidity than the BT40/CT40 tapers used by most competitors. For shops looking at Korean build quality with Japanese-competitive performance, the KF-50 II delivers strong value per dollar.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 1,020 mm (40.2 in) |
| Y-Axis Travel | 510 mm (20.1 in) |
| Z-Axis Travel | 510 mm (20.1 in) |
| Table Size | mm |
| Table Load Max | 800 kg (1,764 lb) |
| Max Spindle Speed | 12,000 RPM (15K/20K options) |
| Spindle Taper | HSK-A63 |
| Spindle Motor Power | kW |
| Spindle Drive | Direct Drive |
| Atc Capacity | 30 tools (40 optional) |
| Atc Type | Servo-driven arm type |
| Rapid Traverse Rate | 48 m/min (1,890 ipm) |
| Guideway Type | Linear roller guideways |
| Positioning Accuracy | ±0.005 mm (±0.0002 in) |
| Repeatability | ±0.003 mm (±0.00012 in) |
| CNC Control | FANUC 0i-MF Plus |
| Machine Weight | 8,200 kg (18,078 lb) |
| Description | Unit |
| Max Load Capacity | kg |
| Spindle Rpm | r/min |
| Spindle Torque | N.m |
| Travel | mm |
| Rapid Feed Rate | m/min |
| No Of Tools | EA |
| Tool Change Time | sec |
| Type Of Business | Business Type 1VehiclesIT/ElectronicsMachinery/ShipbuildingComplex & Precise PartsDie&Mold IndustryEnergyOthersBusiness Type 2 |
| E Mail | @ |
Specifications sourced from wiamachine.com — verified 2026-03-28
Strengths & Limitations
Strengths
- HSK-A63 spindle interface as standard provides superior high-speed rigidity and repeatability compared to BT40/CT40 competitors at this price point
- 48 m/min rapid traverse on all axes is among the fastest in the mid-size VMC class, reducing non-cutting time significantly
- II-Series improvements include better spindle thermal management and faster ATC sequences versus the original KF-50
- Multiple spindle speed options (12K-20K RPM) let buyers match the machine to their primary material mix
- FANUC 0i-MF Plus control with nano-interpolation is industry-standard and compatible with all major CAM systems
- Linear roller guideways deliver excellent positioning accuracy with low maintenance requirements
Limitations
- HSK-A63 tooling costs approximately 40-60% more than BT40/CT40, which increases initial tooling investment for shops building from scratch
- 510 mm Y-travel is adequate but may constrain shops working with wider parts or multi-fixture pallet setups
- Hyundai WIA brand recognition in North America trails Haas, Mazak, and Okuma, potentially affecting resale value
- 30-tool standard ATC capacity is tighter than the 40-60 tool options available on some competitors
Best For
Frequently Asked Questions
01
The II-Series includes improved spindle thermal compensation for better dimensional stability during long runs, faster ATC sequences reducing chip-to-chip time, refined guideway geometry for smoother motion at high feed rates, and updated control software. The fundamental platform — travels, table size, and HSK-A63 spindle — remains the same.
02
The Haas VF-3 offers similar X-travel (1,016 mm) with CT40 tooling at a lower base price. The KF-50 II counters with HSK-A63 spindle rigidity, faster rapids (48 vs 25.4 m/min), and linear roller guideways. The Haas wins on dealer network density and lower tooling cost. For shops prioritizing cutting performance and speed, the KF-50 II is the stronger choice.
03
The 12,000 RPM standard covers general-purpose steel and aluminum work. Choose 15,000 RPM for shops doing 60%+ aluminum with occasional steel. Choose 20,000 RPM for dedicated high-speed aluminum production where surface speed and small-tool capability are critical.
04
The HSK-A63 spindle with 18.5 kW provides adequate torque for productive steel roughing in the mid-range. However, for very aggressive steel and cast iron roughing, the KF5700B II Series with its heavier construction and box-way option may be more appropriate. The KF-50 II is optimized for the speed-rigidity balance most mixed-material shops need.
