Kuraki KBT-11DX
This model was not found in Kuraki's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.
Key Specifications
X Travel
Y Travel
Z Travel
Rapid Traverse
Spindle Power
spindle diameter
How much does the Kuraki KBT-11DX cost?
Estimated price range
Our best estimate for a cnc boring machine in this class — not a quote from Kuraki. Configuration moves it a long way.
Overview
The Kuraki KBT-11DX is a horizontal boring machine with a 110 mm (4.3 in) spindle, travels of 1,800 x 1,400 x 1,200 mm (70.9 x 55.1 x 47.2 in) and a rotary table rated for 8,000 kg (17,637 lb). The maker's current lineup no longer includes it, so it may be an older model, and the listed figures are unverified.
For a boring machine the spindle is quick. Speed runs from 5 - 3,000 RPM on 22 kW (30 HP), and the quill extends 500 mm (19.7 in). The KBT-13A is listed with 30 kW (40 HP) and rapids of 8 m/min (315 IPM); this machine gives up power and moves faster, at 10 m/min (394 IPM). That combination favours mixed milling, drilling and boring on medium-sized housings over heavy roughing.
The rotary table measures 1,250 x 1,400 mm (49.2 x 55.1 in), and its indexing accuracy is listed as 5 arc-seconds. Indexing accuracy decides how well two bores line up when a part is bored from one side, turned half a turn and bored from the other, which is the usual way to make a long bore with a short quill.
Two rows are options and change what a particular machine can do. The tool magazine is a 40-tool ATC, listed as optional, so a machine may have no automatic tool change at all. The facing head, up to 800 mm diameter, is also optional. The control is a Fanuc 31i-B and the machine weighs 22,000 kg (48,502 lb).
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 compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- Spindle speed of 5 - 3,000 RPM on a 110 mm (4.3 in) boring spindle
- Rotary table indexing accuracy of 5 arc-seconds
- Rapid traverse of 10 m/min (394 IPM), faster than the 8 m/min (315 IPM) of the KBT-13A
- Machine weight of 22,000 kg (48,502 lb), against 32,000 kg (70,548 lb) for the KBT-13A
Limitations
- The 40-tool ATC is optional, so automatic tool change cannot be assumed
- The facing head, up to 800 mm diameter, is an option
- Spindle power is 22 kW (30 HP), below the 30 kW (40 HP) of the KBT-13A
- Table load is limited to 8,000 kg (17,637 lb)
Best For
Frequently Asked Questions
01
Only as an option. The tool magazine row reads 40-tool ATC (optional), so some machines will have been built without one. On a machine being offered, check that the magazine is fitted and confirm its tool size limits, which the table does not give.
02
Travels are listed as 1,800 mm (70.9 in) in X, 1,400 mm (55.1 in) in Y and 1,200 mm (47.2 in) in Z, with 500 mm (19.7 in) of spindle quill travel. The rotary table is 1,250 x 1,400 mm (49.2 x 55.1 in) and carries up to 8,000 kg (17,637 lb).
03
Table indexing accuracy is listed as 5 arc-seconds. The table gives no positioning accuracy or repeatability for the linear axes, so those cannot be stated here. Ask for an inspection report on the actual machine if tolerances between faces matter.
04
A facing head is listed as optional, up to 800 mm diameter. Without it, facing is done with a milling cutter on the 110 mm (4.3 in) spindle at 22 kW (30 HP). Whether a given machine has the facing head is something to verify in person.
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