Hyundai WIA KF5700B II Series
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Table Size
Overview
The Hyundai WIA KF5700B II Series is a heavy-duty vertical machining center from Hyundai WIA's second-generation bridge-type platform, designed for shops that need maximum rigidity and heavy cutting capability in a mid-to-large format VMC. The 'B' designation indicates the bridge/box-column construction that provides substantially higher rigidity than C-frame VMCs, while the II-Series brings improved thermal management and updated spindle technology.
Axis travels of 1,050 x 570 x 550 mm (41.3 x 22.4 x 21.7 in) match the standard KF5700 envelope, but the bridge-type column construction dramatically improves rigidity under heavy cutting loads. The 1,270 x 570 mm (50.0 x 22.4 in) T-slot table is rated for 1,200 kg (2,646 lb), and the BT50 spindle delivers 10,000 RPM with 26/22 kW (35/30 hp). The combination of bridge construction, BT50 taper, and high spindle power makes this machine particularly effective for aggressive roughing in tool steel, cast iron, and stainless steel.
Box way construction on all axes provides the vibration damping that heavy-duty milling demands. Rapid traverse of 24 m/min (945 ipm) reflects the heavier moving mass of the box way design. The 30-tool servo-driven ATC handles BT50 toolholders, with 40-tool expansion available. The FANUC 0i-MF Plus control is standard.
At $160,000-$230,000 new, the KF5700B II competes with the Haas VF-4SS (50-taper), Okuma MB-56V, and DN Solutions DNM 6700. For mold and die shops, heavy equipment manufacturers, and any application where cutting force and vibration damping take priority over rapid speed, the KF5700B II delivers a purpose-built heavy-cutting platform at a competitive price.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 1,050 mm (41.3 in) |
| Y-Axis Travel | 570 mm (22.4 in) |
| Z-Axis Travel | 550 mm (21.7 in) |
| Table Size | mm |
| Table Load Max | 1,200 kg (2,646 lb) |
| Max Spindle Speed | 10,000 RPM |
| Spindle Taper | BT50 |
| Spindle Motor Power | kW |
| Spindle Drive | Belt drive |
| Atc Capacity | 30 tools (40 optional) |
| Atc Type | Servo-driven arm type |
| Rapid Traverse Rate | 24 m/min (945 ipm) |
| Guideway Type | Hardened and ground box ways |
| Positioning Accuracy | ±0.005 mm (±0.0002 in) |
| Repeatability | ±0.003 mm (±0.00012 in) |
| CNC Control | FANUC 0i-MF Plus |
| Machine Weight | 14,000 kg (30,865 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
- Bridge-type column construction provides significantly higher rigidity than C-frame VMCs for heavy-duty milling and facing operations
- BT50 spindle with 26 kW power delivers the torque needed for aggressive roughing in tool steel, cast iron, and stainless
- Box way guideways provide superior vibration damping for interrupted cuts and heavy facing on tough materials
- 1,200 kg table load capacity handles heavy workpieces, robust fixtures, and tombstone setups
- II-Series thermal management improvements maintain dimensional accuracy during extended heavy-cutting programs
- Competitive pricing at $160K-$230K versus comparable European and Japanese bridge-type VMCs
Limitations
- 24 m/min rapid traverse is slower than linear guide machines — not ideal for programs with many fast positioning moves
- 10,000 RPM maximum speed limits high-speed aluminum capability — this machine is optimized for ferrous materials
- 14,000 kg weight and bridge construction require significant floor space and foundation planning
- Box ways require consistent lubrication maintenance to prevent accelerated wear
Best For
Frequently Asked Questions
01
Bridge-type (double-column) construction supports the spindle from both sides, creating a much stiffer structure than a C-frame that is supported on one side only. This eliminates the column deflection that C-frame machines experience during heavy side-loading cuts. The result is better surface finish, tighter tolerances, and longer tool life during aggressive roughing operations.
02
The standard KF5700 uses a C-frame design with BT40 taper, linear roller guideways, and 42 m/min rapids — optimized for speed and mixed-material work. The KF5700B II uses bridge construction, BT50 taper, box ways, and 24 m/min rapids — optimized for heavy cutting in ferrous materials. Choose the standard KF5700 for aluminum-heavy work and the KF5700B II for steel-dominant applications.
03
The box way guideways and heavier bridge construction increase the moving mass, which reduces maximum rapid traverse speed. This is an inherent trade-off of heavy-duty machine design. The benefit is dramatically better vibration damping and rigidity during cutting. For heavy ferrous machining, the time saved by better metal removal rates typically offsets the slower positioning moves.
04
New KF5700B II machines typically sell for $160,000-$230,000 depending on options, tooling packages, and regional pricing. This is competitive with the Haas VF-4SS 50-taper and significantly less than comparable European bridge-type VMCs from brands like DMG Mori and Hermle.
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