Toshiba MPC-T

$2,000,000 - $5,000,000+ Updated 2026-03-16

Key Specifications

Table Size

2,500 x 2,500 mm (standard) to 6,000 x 6,000 mm (custom)

Spindle Power

55 kW (73.8 hp)

Accuracy

± 0.010 mm

max table load

50,000 kg (110,230 lb) standard; higher on request

spindle diameter

130 mm (5.1 in) boring spindle

spindle speed

1 - 800 RPM

Overview

The Toshiba MPC-T is a large-scale CNC table-type horizontal boring and milling machine from Toshiba Machine (now Shibaura Machine), one of Japan's premier manufacturers of large-format precision machining systems. Toshiba Machine's horizontal boring mill series serves the power generation, aerospace, marine, and heavy industrial manufacturing sectors where workpiece weights range from several tons to over 100 tons and machining accuracy requirements remain in the 0.010-0.020 mm range across multi-meter workpiece spans.

The MPC-T table-type configuration positions the workpiece on a large rotary CNC table that indexes under the boring spindle. The horizontal boring spindle approaches from the side, enabling boring, milling, and threading operations on all four vertical faces of a large workpiece without refixturing — the CNC table rotates 360° to present each face. Spindle quill travel extends the boring bar axially into deep bores, while X/Y/Z axes position the spindle to the correct location on each face. W-axis (quill extension) reaches into bores up to 1,500 mm deep without requiring the entire machine to advance.

Toshiba's MPC-T series is specified for nuclear power plant component manufacturing — reactor pressure vessel nozzle machining, large steam generator tube sheet boring, and heavy structural component facing require the MPC-T's combination of massive workpiece capacity, precision boring capability, and rigidity under heavy interrupted cutting conditions. The machine's anti-friction spindle bearing design maintains bore accuracy at the low spindle speeds required for large-diameter boring (200-500mm diameter boring bars turning at 20-100 RPM).

At $2,000,000-$5,000,000+ depending on table size and spindle specification, the MPC-T is a capital investment in the heavy industrial and energy infrastructure manufacturing sector. Toshiba Machine provides turnkey installation, leveling, and calibration through their global service organization.

Full Specifications

Parameter	Value
Table Size	2,500 x 2,500 mm (standard) to 6,000 x 6,000 mm (custom)
Max Table Load	50,000 kg (110,230 lb) standard; higher on request
Spindle Diameter	130 mm (5.1 in) boring spindle
Spindle Speed	1 - 800 RPM
Spindle Motor Power	55 kW (73.8 hp)
X Axis Travel	6,000 mm (236 in)
Y Axis Travel	3,000 mm (118 in)
Z Axis Travel	2,000 mm (78.7 in)
W Axis Quill	1,000 mm (39.4 in)
Table Rotation	360° continuous
Positioning Accuracy	± 0.010 mm
CNC Control	Fanuc 30iM / Siemens 840D
Machine Weight	~200,000 kg (440,924 lb)
Manufacturer	Toshiba
Model	MPC2665B

Specifications sourced from machinio.com — verified 2026-03-28

Strengths & Limitations

Strengths

50,000+ kg table capacity handles the heaviest power generation and marine industrial components
360° CNC rotary table enables 4-face machining of large cubic workpieces without refixturing
55 kW spindle at 800 RPM provides the torque required for large-diameter boring bar cuts in heavy steel castings
W-axis quill extends 1,000 mm to reach deep bores without advancing the entire machine column
Toshiba Machine's global service organization provides on-site calibration and service for mission-critical installations

Limitations

$2M-$5M+ investment is justified only by sustained heavy industrial or power generation machining programs
Installation requires heavy concrete foundation, overhead crane, and months of site preparation and machine leveling
Parts procurement and service response for Toshiba Machine in North America requires coordination with Japan factory support
Operators and programmers require extensive training in large-part fixturing, boring bar selection, and multi-face machining strategies

Best For

Nuclear power plant component manufacturers machining reactor pressure vessel nozzles, steam generator components, and heavy structural parts Offshore oil and gas equipment manufacturers machining large subsea manifolds, wellhead components, and pressure vessel bodies Marine equipment manufacturers machining large propulsion system housings, rudder frames, and anchor handling equipment Heavy power generation manufacturers machining steam turbine casings, generator housings, and large industrial gearbox bodies Aerospace manufacturers machining large structural tooling, jigs, and fixtures for commercial and military aircraft assembly

Frequently Asked Questions

01 What workpiece configurations can the MPC-T accommodate?

The MPC-T table-type boring machine handles large prismatic workpieces — reactor vessel nozzle bosses, large valve bodies, heavy equipment frames, and large pressure vessel flanges. Workpieces are typically fixtured directly to the rotary table using T-slot hold-downs, angle plates, or custom fixtures. Toshiba Machine's application engineers design fixturing strategies for non-standard workpiece configurations. The rotary table indexes in 0.001° increments for angular positioning of features around the workpiece perimeter.

02 What boring diameters can the MPC-T achieve?

The MPC-T handles bore diameters from approximately 30 mm (using standard boring bar tooling) up to 1,000 mm or more using facing and boring heads mounted on the main spindle. Large-diameter boring (500-1,000mm) uses specialized ring-boring attachments with adjustable cutting inserts set to the required bore diameter. For nuclear steam generator tube sheet boring, the machine bores thousands of tube holes (typically 22-25mm diameter) in a precision pattern using CNC positioning between holes.

03 How does positioning accuracy of ±0.010 mm compare to smaller machining centers?

±0.010 mm (10 microns) positioning accuracy on a machine with 6,000 mm travel axes is actually impressive — it represents a positional accuracy of approximately 1.7 parts per million of travel. Small machining centers achieve ±0.003 mm or better on 500-1,000mm axes, but maintaining that accuracy across 6 meters of travel requires much more precise ballscrew and thermal compensation systems. The MPC-T's ±0.010 mm accuracy meets the requirements of all heavy industrial boring applications — it is exceeded only by the most demanding precision assembly jig boring requirements.