Seiki KT Series – Milling and Tapping Centers

The Seiki KT series is the fastest CNC milling and tapping center in its class. This machine will exceed the demands of any manufacturer with high volume, high precision machining needs. The compact size consumes very little valuable floor space while the blazing speed will deliver more parts per hour than the competition. The machine is a moving column / fixed table type design with rotary pallet changer.

The machine is a traveling column type design where the worktable is stationary.  The APC unit, located in front of the machine, provides easy access and slashes idle time.  The APC is a built-in type rotary type pallet changer mounted in front of the machine.  It exchanges the fixed tables in only 4.5 seconds.  The rotary pallet uses a hydraulic cylinder to rotate the pallet and a hirth coupling hydraulic clamping mechanism to clamp the pallet in place without lifting for excellent repeatability.  The center port of the APC unit is pre-plumbed for hydraulic or pneumatic fixturing.

It features a Meehanite cast iron frame and rigid linear slideways for rigidity and fast, precise movement. The 36mm (1.42”) diameter ballscrews are class 3 with a double nut pre-loaded design allowing a standard rapid traverse rate of 2362 inches per minute in the Z axis with acceleration of 1.0G.  The ABS (Absolute Pulse Coder) servo system does not require zero return.  The machine can be started anytime from any position, saving non-productive time.  A standard bed flushing system pushes chips to the rear of the machine.  The optional caterpillar chip conveyor provides efficient chip removal.

The KT-360D is equipped with a 21 tool servo turret type ATC.  The KT-360D’s standard 21 station turret style servo automatic tool changer provides fast, reliable tool selection.  Complete tool change time is only 1.07 seconds tool to tool and 1.36 seconds chip to chip.

The standard spindle is a 28HP peak / 6.5HP continuous, 15,000 RPM direct drive spindle that provides rigid tap speeds up to 6000 RPM.  For 40 taper milling performance in a compact 30 taper machine, the optional 10,000 RPM High Torque spindle produces 28HP peak / 11.3 HP continuous with a whopping 120Nm of torque.  An optional 24,000 RPM direct drive spindle with 35HP peak / 5 HP continuous delivers high RPM for aluminum / magnesium parts machining as well as an excellent choice for graphite.  A spindle chiller is standard.  The BBT-30 (Big Plus dual contact) taper is standard for rigid milling.  Coolant through the spindle preparation is also standard.

The Mitsubishi M80A control is standard and is suitable for a wide range of applications from production to high speed machining applications.  The M80A control features a 10.4” touch screen with intuitive smart phone type operation.  A dedicated CNC CPU provides phenomenal processing speeds.  An all new high response servo system with 1,000,000 pulse encoders is provided for state-of-the-art speed and accuracy. The Mitsubishi control comes with an industry leading 3 year parts and labor warranty!  The Fanuc OiM-F Plus control with 10.4” LCD and 2 year warranty is also available.

Specifications

Item / Model
KT-420DH TWIN SPINDLE Request a Quote
KT-420AL Request a Quote

Travels

Longitudinal Travel X-Axis

20.5″

22″

22″

22″

27.6″

27.6″

Cross Travel Y-Axis

14.17″

16.5″

16.5″

16.54″

16.5″

16.5″

Vertical Travel Z-Axis

11.8″

11.8″

16.9″

16.93″

11.8″

16.9″

U axis Travel (option)

Table to Spindle

7.9″ min / 19.7″ max

7.9″ min / 19.7″ max

7.9″ min / 24.8″ max

7.87″ min / 24.8″ max

6.7″ min/18.5″ max

6.7″ min/23.6″ max

Spindle Center to Column

18.7″

18.9″

18.9″

18.3″

18.9″

18.9″

Centerline Distance Between Spindles

19.7″ (500mm)

Table

Table Working Surface

25.6″ x 17.7″ x 2

26″ x 15.7″

26″ x 15.7″

45.3″ x 17.7″

31.5″ x 15.7″

31.5″ x 15.7″

Maximum Workload on Table

440 lbs. x 2

550 lbs.

550 lbs.

880 lbs.

660 lbs.

660 lbs.

Table Surface

Ground / T-slotted

Ground / T-slotted

Ground / T-slotted

Ground / T-slotted

Ground / T-slotted

Ground / T-slotted

No. of T-slots x Width

Table Height from Floor

Spindle

Spindle Motor

Spindle Taper

RPM

Spindle Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Optional Spindle (High Torque 120Nm / 88.5 ft/lbs)

Spindle Motor

28HP peak / 11.3 HP continuous

28HP peak / 11.3 HP continuous

28HP peak / 11.3 HP continuous

28HP peak / 11.3 HP continuous x 2

28HP peak / 11.3 HP continuous

28HP peak / 11.3 HP continuous

Spindle Taper

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

RPM

0-10000 RPM

0-10000 RPM

0-10000 RPM

0-10000 RPM

0-10000 RPM

0-10000 RPM

Spindle Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Optional Spindle (High Speed)

Spindle Motor

35HP peak / 5 HP continuous

35HP peak / 5 HP continuous

35HP peak / 5 HP continuous

35HP peak / 5 HP continuous x 2

35HP peak / 5 HP continuous

35HP peak / 5 HP continuous

Spindle Taper

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

BBT-30 dual contact

RPM

0-24000 RPM

0-24000 RPM

0-24000 RPM

0-24000 RPM

0-24000 RPM

0-24000 RPM

Spindle Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

Direct Drive

ATC- Turret Type

Number of Tools

21 Tools

21 Tools

21 Tools

Tool Selection

Bi-Directional-Fixed

Bi-Directional-Fixed

Bi-Directional-Fixed

Tool Change Time

1.07 sec tool to tool

1.07 sec tool to tool

1.07 sec tool to tool

Chip to Chip Time

1.36 sec chip to chip

1.36 sec chip to chip

1.36 sec chip to chip

Magazine Index Time Adjacent Station

0.1 seconds

0.1 seconds

0.1 seconds

Magazine Index Time 180 deg. (use symbol)

1.8 seconds

1.8 seconds

1.8 seconds

Max Tool Diameter

3.94″

3.94″

3.94″

Max Tool Weight

6.6 lbs.

6.6 lbs.

6.6 lbs.

Tool Type

BBT-30

BBT-30

BBT-30

Max Tool Length

7.9″

7.9″

7.9″

ATC – Arm Type

Number of Tools

20 tools (+1 in the spindle) (26+1 opt.)

20 tools (+1 in the spindle) (26 opt.) x 2

20 tools (+1 in the spindle) (26 opt.) x 2

Tool Selection

Bi-Directional-Random

Bi-Directional-Random

Bi-Directional-Random

Tool Change Time

1.2 sec tool to tool

1.2 sec tool to tool

1.2 sec tool to tool

Chip to Chip Time

1.8 sec chip to chip

1.8 sec chip to chip

1.8 sec chip to chip

Max Tool Diameter

3.15″ (2.52” with 26 tools)

3.15″ (2.52” with 26 tools)

3.15″ (2.52” with 26 tools)

Max Tool Weight

6.6 lbs.

6.6 lbs.

6.6 lbs.

Tool Type

BT-30

BT-30

BT-30

Max Tool Length

7.9″

7.9″

7.9″

Ballscrews and Axis Motors

X-Y-Z Ballscrew Diameter

36mm (1.42”) x 16mm pitch

X 36mm (1.42”) x 16mm pitch, Y 28mm (1.1”) x 16mm, Z 32mm (1.26”) x 20mm

X 36mm (1.42”) x 16mm pitch, Y 28mm (1.1”) x 16mm, Z 32mm (1.26”) x 20mm

36mm (1.42”) x 16mm pitch

X 36mm (1.42”) x 16mm pitch, Y 28mm (1.1”) x 16mm, Z 32mm (1.26”) x 20mm

X 36mm (1.42”) x 16mm pitch, Y 28mm (1.1”) x 16mm, Z 32mm (1.26”) x 20mm

Z axis Ballscrew Diameter

32mm (1.26”) x 20mm pitch

32mm (1.26”) x 20mm pitch

Ballscrew Type

Class 3 double nut pre-loaded

Class 3 double nut pre-loaded

Class 3 double nut pre-loaded

Class 3 double nut pre-loaded

Class 3 double nut pre-loaded

Class 3 double nut pre-loaded

Ballscrew Mounting Type

Double anchored

Double anchored

Double anchored

Double anchored

Double anchored

Double anchored

X-Y-Z Servo Motor HP

4.0 – 4.0 – 3.0HP

2.0 – 2.0 – 3.0HP

2.0 – 2.0 – 3.0HP

4.0 – 4.0 – 3.0HP x 2

2.0 – 2.0 – 3.0HP

2.0 – 2.0 – 3.0HP

Servo Motor Mounting

Direct coupled

Direct coupled

Direct coupled

Direct coupled

Direct coupled

Direct coupled

APC Unit

Type

Rotary (0-180 degrees)

Change Time

4.5 seconds

Rotation Method

Hydraulic Cylinder

Clamping Method

Hydraulic hirth coupling / non-lift type

Feeds

Rapid Traverse Rate X, Y, Z

1969, 1969, 2362 IPM

2362 IPM

2362 IPM

1890, 1890, 2200 IPM

1969, 1969, 2362 IPM

1969, 1969, 2362 IPM

Acceleration

1.2G

1.0G

1.0G

1.0G

1.2G

1.2G

Cutting Feed Rate

0.01 – 787 IPM

0.01 – 787 IPM

0.01 – 787 IPM

0.01 – 787 IPM

0.01 – 787 IPM

0.01 – 787 IPM

Positioning Accuracy

+/- .0002″ full stroke

+/- .0002″ full stroke

+/- .0002″ full stroke

+/- .0002″ full stroke

+/- .0002″ full stroke

+/- .0002″ full stroke

Repeatability

+/- .00015″

+/- .00015″

+/- .00015″

+/- .00015″

+/- .00015″

+/- .00015″

General

Coolant Tank Capacity

60 gallons

60 gallons

60 gallons

60 gallons

60 gallons

60 gallons

Floor Space

69″ x 126″ x 107″

69″ x 99″ x 105″

69″ x 99″ x 105″

90″ x 102″ x 104″

81″ x 99″ x 105″

81″ x 99″ x 105″

Machine Power Source*

208/220 Volts, 3 Phase 40 Amps*

208/220 Volts, 3 Phase 40 Amps*

208/220 Volts, 3 Phase 40 Amps*

208/220 Volts, 3 Phase 60 Amps*

208/220 Volts, 3 Phase 40 Amps*

208/220 Volts, 3 Phase 40 Amps*

Air Source

90 PSI

90 PSI

90 PSI

90 PSI

90 PSI

90 PSI

Machine Weight

9,460 LBS

5,060 lbs.

5,060 lbs.

12,100 lbs.

5,720 lbs.

5,720 lbs.

In Stock and Ready for Immediate Delivery

Image Model and Brand Serial #
KT-420L CNC Milling/Tapping Center
Seiki

KT-420L with MITS M80A Ctrl, 15,000 RPM, 6.5HP, 21 Tool ATC, Conveyor, 1000psi CTS Prep (Location: Lorain, OH)

V015
KT-420L CNC Milling/Tapping Center
Seiki

KT-420L with MITS M80A Ctrl, 15,000 RPM, 6.5HP, 21 Tool ATC, Conveyor, 1000psi CTS Prep (Location: Lorain, OH)

V015
KT-360D CNC Milling/Tapping Center
Seiki

KT-360D with MITS M80A Ctrl, 15,000 RPM, 7.5HP, 21 Tool ATC, Conveyor, 1000psi CTS Prep (AMT – Lorain, OH)

V012
KT-360D CNC Milling/Tapping Center
Seiki

KT-360D with MITS M80A Ctrl, 15,000 RPM, 7.5HP, 21 Tool ATC, Conveyor, 1000psi CTS Prep (AMT – Lorain, OH)

V012