Kuraki KBT-11DX

$350,000 - $550,000 Updated 2026-03-14

Key Specifications

X Travel

1,800 mm (70.9 in)

Y Travel

1,400 mm (55.1 in)

Z Travel

1,200 mm (47.2 in)

Rapid Traverse

10 m/min (394 IPM)

Spindle Power

22 kW (30 HP)

spindle diameter

110 mm (4.3 in)

Overview

The Kuraki KBT-11DX is a table-type horizontal boring mill featuring a 110 mm (4.3 inch) spindle diameter and a design philosophy centered on versatility and precision for medium-sized workpieces. Unlike the floor-type KBT-13A, the table-type configuration integrates the rotary table into the machine's axis system, making it better suited for shops that process a higher mix of parts and need faster setup times. The DX designation represents Kuraki's updated design with improved thermal management and modern CNC integration.

The 110 mm quill spindle runs from 5 to 3,000 RPM with a 22 kW main motor. The higher maximum speed compared to the larger KBT-13A reflects the DX series' orientation toward a broader range of work — from heavy boring in cast iron to finish machining of aluminum housings. X-axis travel of 1,800 mm, Y-axis of 1,400 mm, and Z-axis of 1,200 mm provide a generous working envelope for medium-sized castings, gearboxes, and manifold blocks.

The table-type design mounts the workpiece on an integrated rotary table that travels in the Z-axis (toward and away from the spindle column). This configuration provides inherent rigidity because the column remains stationary during Z-axis motion, and the table's mass adds to the system's vibration damping. The rotary table handles workpieces up to 8,000 kg with full 360-degree CNC indexing at 5 arc-second accuracy.

Kuraki's DX-series thermal management system uses temperature sensors on the spindle, column, and bed to apply real-time compensation for thermal growth. This is particularly valuable during long production runs where ambient temperature changes and spindle heat generation would otherwise cause bore positions to drift. The Fanuc 31i-B control handles 4+1 axis simultaneous control, and an optional 40-tool ATC brings the machine closer to machining center flexibility while retaining the boring mill's core strength in heavy precision boring.

Full Specifications

Parameter	Value
Spindle Diameter	110 mm (4.3 in)
Spindle Speed	5 - 3,000 RPM
Spindle Motor Power	22 kW (30 HP)
Spindle Quill Travel	500 mm (19.7 in)
X-Axis Travel	1,800 mm (70.9 in)
Y-Axis Travel	1,400 mm (55.1 in)
Z-Axis Travel	1,200 mm (47.2 in)
Rotary Table Size	1,250 x 1,400 mm (49.2 x 55.1 in)
Max Table Load	8,000 kg (17,637 lb)
Table Indexing Accuracy	5 arc-seconds
Rapid Traverse Rate	10 m/min (394 IPM)
Facing Head	Optional, up to 800 mm diameter
CNC Control	Fanuc 31i-B
Machine Weight	22,000 kg (48,502 lb)
Tool Magazine	40-tool ATC (optional)

Specifications sourced from us.dmgmori.com — verified 2026-03-28

Strengths & Limitations

Strengths

Table-type design provides inherent rigidity from stationary column and simplifies workpiece setup compared to floor-type machines
DX-series thermal management with real-time compensation maintains bore accuracy across long production runs
3,000 RPM spindle speed with 22 kW power handles both heavy boring and lighter milling operations
8,000 kg table capacity covers the majority of medium-sized industrial castings and weldments
CNC rotary table with 5 arc-second accuracy enables precise multi-face machining in a single setup
Optional 40-tool ATC adds machining center flexibility while retaining boring mill rigidity and precision

Limitations

110 mm spindle diameter is smaller than the KBT-13A, limiting maximum boring bar diameter for very heavy cuts
22,000 kg machine weight still requires significant foundation work, though less than floor-type models
Table-type design limits maximum workpiece size compared to floor-type machines where the workpiece sits on the floor
10 m/min rapid traverse is moderate — newer competing machines offer 15-20 m/min rapids
Kuraki's market presence in North America is smaller than Doosan, SNK, or Toshiba for horizontal boring mills

Best For

Medium-sized casting and weldment machining in general heavy industry job shops Gearbox and transmission housing production requiring precise bore-to-bore relationships Pump and compressor manufacturers machining medium-sized housings and manifold blocks Shops processing a variety of parts that benefit from the table-type design's faster setup times Facilities needing boring mill precision with some machining center flexibility through the optional ATC Production environments where thermal stability over long runs is critical for maintaining tolerances

Frequently Asked Questions

01 What does a Kuraki KBT-11DX cost?

New Kuraki KBT-11DX machines typically price between $350,000 and $550,000 depending on table configuration, ATC, and accessories. Used machines trade in the $120,000-$280,000 range depending on age and condition.

02 What is the difference between the KBT-11DX and KBT-13A?

The KBT-11DX is a table-type machine with 110 mm spindle and 8,000 kg table capacity, while the KBT-13A is a floor-type with 130 mm spindle and 15,000 kg capacity. The 11DX is better for mixed production of medium parts; the 13A is for larger, heavier workpieces.

03 What does the DX designation mean?

The DX designation indicates Kuraki's updated design with improved thermal management, modern CNC integration, and refined construction compared to earlier KBT models. It represents the current generation of Kuraki table-type horizontal boring mills.

04 Can the KBT-11DX do milling as well as boring?

Yes. The 3,000 RPM spindle with 22 kW power handles face milling, pocket milling, and drilling operations in addition to boring. With the optional ATC, the machine approaches machining center versatility while maintaining boring mill rigidity.

05 How does the thermal compensation system work?

Temperature sensors mounted on the spindle bearing housing, column, and bed continuously monitor thermal conditions. The Fanuc 31i-B control applies real-time axis position compensation to counteract thermal growth, maintaining bore position accuracy during extended machining cycles.