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HYUNDAI WIA Machine America Corp

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KF5700B/6700B/7700B Excellent Heavy Duty Cutting Capability & Productivity Vertical Machining Center

The Vertical Machining Center KF-B Series, designed by Hyundai WIA with years of expertise and the latest technology, maximizes productivity while maintaining rigidity and accuracy.

The Fastest, the Most Versatile High end Linear Machining Center

  • Box guideways for exceptional feeding during heavy duty cutting
  • High-powered, high-torque main spindle for superb heavy duty cutting
  • Main spindle with gear drive for high-power and high torque (BT50 Option)
  • Latest Servo ATC for highly efficient tool exchanging

Basic Features

Excellent Heavy Duty Cutting Capability & Productivity Vertical Machining Center


KF5700B Travel

Travel (X/Y/Z) 1,100/570/520 mm

KF6700B Travel

Travel (X/Y/Z) 1,300/670/635 mm

KF7700B Travel

Travel (X/Y/Z) 1,500/760/635 mm

KF5700/6700/7700B Traverse Rate

Rapid Traverse Rate (X/Y/Z) 30/30/24 m/min
(1,181/1,181/945 ipm)

1Direct Driven Spindle

he motors and spindles are directly connected, thus shortening the spindle's acc./deceleration time. To achieve higher speed of the spindle, the design involves super-precision, hi-speed angular ball bearings, enabling an increased machining capability.

Gear Driven Spindle OPTION

he KF-B Series can be fitted with a gear-type spindle shift as an optional feature so ensure a shift to stable rotation at high speed from strong torque at low speed, thus offering a wider range of machining.

Direct Driven Spindle (BT40, BT50)

8,000 / 12,000 rpm

Gear Driven Spindle (BT50)

8,000 rpm

※Thermal Displacement Compensation as Standard


< Gear Driven >


< Direct Driven >


Compared to competitive machines, the KF-B series has a large working capacity to make setup easier and provide convenience to the operator.

Model KF5700B KF6700B KF7700B
Size 1,300×570 mm
1,500×670 mm
1,650×760 mm
1,000 kg
(2,205 lb)
1,300 kg
(2,866 lb)
1,500 kg
(3,307 lb)


3ATC & Magazine

The tool magazine holds 30 tools as standard and 40 tools(BT50 : Std. 24EA, Opt. 30EA) as an option. Due to the wider selection of tools and the random tool selection method, tool change time has improved.

Tool Change Time (C-C) : 3.5 sec


4All Axis Large Boxgide way

Capability of heavy-duty cutting and vibration absorption is enhanced drastically due to expanded box guide.

Division X Axis Width Y Axis Width Z Axis Width
KF6700B 100mm (3.9″) 160mm (6.3″) 125mm (4.9″)
100mm (3.9″) 100mm (3.9″) 100mm (3.9″)



Heavy Duty Cutting by High-Rigid & Accurate Mechanism


One Piece High Column Structure

Additional 300mm(11.8″) extension can be applied on the KF-B Series as an option.

High-Rigidity Design for Column & Bed

he stable design of column assembly surface on bed top enables securing the fundamental rigidity of the structure.

(Full scrapping of assembly area : 10 fixing bolts)

KF5700B (A~B)

Distance from Table Top to SP. Nose 150~670 mm

KF5700B/50 (A~B)

Distance from Table Top to SP. Nose 200~720 mm

KF6700B | KF7700B (A~B)

Distance from Table Top to SP. Nose 150~785 mm

KF6700B/50 | KF7700B/50 (A~B)

Distance from Table Top to SP. Nose 200~835 mm

Double anchored ball screw

The pretensioned ball screw minimizes the expansion and contraction according to the heat and further reinforces the rigidity by the double anchor support method. In addition, the coupling of the ballscrews and the highly reliable digital servo motors are connected by metal plate couplings, to reduce coupling breakage and backlash.


3 Row bearing + Oil Lubricated
Rigidity 147% UP
compared to previous model

Powerful Spindle

Long Lasting High Accuracy & Excellent Performance

Direct Driven Spindle

The directly coupled spindle at a maximum revolution of 12,000rpm, allows high-speed processing. Additionally, the large diameter and the thickness of the spindle add to the stability of the machine.


8,000rpm (BBT40/BBT50)

Spindle Output 15/11 kW (20.1/14.7 HP)
Spindle Torque 286/143 N.m (210.9/105.5 lbf.ft.)

12,000rpm (BBT40)

Spindle Output 18.5/11 kW (24.8/14.7 HP)
Spindle Torque 118/70 N.m (87/51.6 lbf.ft)

Spindle Cooling

The spindle cooling system minimizes thermal displacement which can happen during lengthy machining operations, and offers continued accuracy based on the thermal stability.

<External cooling via head frame enhances chilling ability>

Through Spindle Coolant OPTION

Through Spindle Coolant is exceedingly useful when drilling deep holes. It helps increase the lifetime of the tool, while decreasing cycle time.


20 bar / 30 bar / 70 bar
(290 psi / 435 psi / 1,015 psi)

Heavy-Duty Cutting
High-power Gear Driven Spindle

It provides stable machining capability by doubling the heavy cutting capacity with the maximum torque of the same class. It guarantees stable torque at high speed at low speed and stable rotation at high speed to realize wide machining.


8,000rpm (BBT50)

Spindle Output 18.5/15 kW (24.8/20.1 HP)
Spindle Torque 586.3/475.4 N.m
(432.2/350.6 lbf.ft)

Dual Contact Spindle

The Big Plus spindle system provides dual contact between the spindle face and the flange face of the tool holder. This greatly increases tool rigidity, reduces run out and adds significant productivity to machining applications.