Machines / Mira J9 — Technical Overview

Mira J9 5-Axis CNC Mill

The Mira J9 is a desktop 5-axis simultaneous CNC mill designed for machining plastic, hard wood, and metal. The system includes an automatic tool changer, enhanced carriages, a high-performance spindle, and a hermetically sealed work area.

NS CNC Mira J9 — desktop 5-axis CNC mill with the sealed work area and NS-Motion monitor on a swing arm
Mira J9

Rotary Head & Kinematics

The rotary head utilizes a dual-bearing support structure, a harmonic reducer, and a servo motor.

Front view of the dual-bearing rotary head: both A-axis bearing housings, the B platter with the QRS chuck, and the spindle nose on the alignment centerline

Supported on both sides.

The dual-bearing support structure carries the rotary head at both ends, with rotation driven through a harmonic reducer by a servo motor.

The A-axis is mechanically aligned with the linear axes to maintain kinematic accuracy.

Support
Dual bearing
Drive
Harmonic reducer · servo
Rotation (A, B)
360° continuous
Alignment
Mechanical, to X·Y·Z
SPEC 01

True simultaneous 5-axis

Three linear axes (X, Y, Z) plus two rotary axes (A, B) turning 360° continuously — the workpiece presents to the cutter from any angle in one setup.

SPEC 02

15-tool automatic changer

Triggered via the M6 command, the software interface, or a button in the work area, behind an automated chip-resistant cover. The Tool Height Sensor measures tool height after every change.

SPEC 03

60,000 RPM Nakanishi spindle

The NSK Nakanishi E3000 3060 AQC — 350 W, ceramic bearings, pneumatic tool clamping, runout (spindle accuracy) under 1 micron (0.001 mm). 60,000 RPM with air, 30,000 without.

SPEC 04

1-micron pallet positioning

The Quick-Release System mini pallet repositions within 1 micron — a workpiece can leave the machine and return to the same position. Vice or direct screw mounting.

SPEC 05

Resolution of 0.3 microns

The smallest commanded move is 0.0003 mm, with positioning of 0.008 mm and repeatability of 0.010 mm — verified before every machine ships.

SPEC 06

Sealed, on standard power

A hermetically sealed work area for plastic, hard wood, and metal — drawing roughly 2.0 kW from single-phase 110 or 220 VAC. 660 lb (300 kg) on a 36.6 × 28.7″ footprint.

Mira J9

Workpiece Holding

The machine supports traditional mounting methods and a Quick-Release System (QRS) utilizing a mini pallet.

A workpiece blank mounted on the QRS mini pallet, seated in the chuck on the B platter beneath the spindle

Off, on, and back within a micron.

The QRS pallet positioning accuracy is within 1 micron — a workpiece can leave the machine and return to the same position.

Workpieces can be secured using a standard vice or mounted directly to the pallet with screws.

System
QRS mini pallet
Positioning
Within 1 μm
Vice
Standard
Direct mount
Screws, to the pallet

Standard vice

A self-centering vice seated in the QRS chuck on the rotary table beneath the spindle

Square and irregular stock clamps in a vice fixed to the pallet — the traditional mounting method, unchanged.

Direct screw mounting

Three QRS pallets with stock mounted directly: a steel block, an aluminum disc, and a brass block

Plates and fixtures bolt straight to the pallet — no vice in the way of the cutter. Custom pallets are available on request.

Mira J9

Automatic Tool Changer

The ATC features a 15-tool capacity and is protected by an automated, chip-resistant cover. Tool clamping is pneumatic and operates using an air-powered system.

The 15-station tool magazine with numbered stations, taper tool holders seated, and the tool height sensor with its LED indicator at left

Fifteen tools, three triggers.

Tool changes can be triggered automatically via the M6 command, manually through the software interface, or via a physical button in the work area.

A Tool Height Sensor (THS) equipped with an LED contact indicator automatically measures tool height after every change.

Capacity
15 tools
Clamping
Pneumatic, air-powered
Cover
Automated, chip-resistant
After every change
THS height measurement
The spindle with a tool in the collet, directly above the closed magazine cover
the spindle over the magazine cover
Taper tool holders seated in the magazine, the automated cover pivoted open
taper holders seated — cover open
Mira J9

Spindle Specifications

The machine is equipped with the NSK Nakanishi NR3060-AQC spindle (E3000 series).

The NSK Nakanishi NR3060-AQC spindle with a tool in the collet chuck, flanked by the coolant nozzle and the air nozzle

60,000 RPM with air. 30,000 without.

Maximum speed is 60,000 RPM with air and 30,000 RPM without — at 350 watts, with runout (spindle accuracy) under 1 micron (0.001 mm).

Tools mount in conical holders and clamp pneumatically with compressed air — the same architecture as industrial-scale CNC equipment.

Model
NR3060-AQC
Max speed
60,000 RPM with air
Without air
30,000 RPM
Power
350 W
A conical taper tool holder with a fine end mill in the collet
a taper holder with an end mill
Four conical taper tool holders with different collets and tools
taper holders across collet sizes
Mira J9

Coolant System

Two modes, independently configurable, both aimed at the cutting zone.

The coolant nozzle, spindle nose, and air nozzle converging on the cutting point

Mist or flow.

Mist mode delivers a user-adjustable mixture of pressurized air and coolant to clear chips from the cutting zone.

Coolant mode delivers low-pressure liquid coolant directly to the tool. Flow is controlled by an electromagnetic valve that creates customizable pulsing intervals.

Mist
Air + coolant, adjustable
Coolant
Low-pressure liquid
Valve
Electromagnetic
Pulsing
Customizable intervals
Mira J9

Key Machine Specifications

Resolution of 0.00001″ (0.0003 mm) across a working volume of 4.0 × 4.0 × 5.0″ — with both rotary axes turning 360° continuously.

Working volumeA · B — 360° continuousX — 4.0″ (102 mm)Z — 5.0″ (140 mm)Y — 4.0″ (102 mm)

The numbers off the sheet.

Working volume: 4.0″ (102 mm) in X, 4.0″ (102 mm) in Y, and 5.0″ (140 mm) in Z. Both rotary axes, A and B, turn 360 degrees continuously.

The machine measures 36.6″ W × 28.7″ D × 42″ H (920 × 730 × 1,050 mm) and weighs 660 pounds (300 kg).

Dimensions
36.6 × 28.7 × 42″
Weight
660 lb (300 kg)
Consumption
~2.0 kW
Supply
110 or 220 VAC, single phase
Resolutionsmallest commanded move0.3 μm
Positioninghow close it lands to a target8 μm
Repeatabilityhow exactly it returns, cut after cut10 μm
scale: full bar = 10 μm = 0.01 mm. a human hair is ~70 μm.
Mira J9 / Applications

Applications

Rapid prototyping, watch production, microscopic sensors, biomedical components, and micro-scale structures — machined in plastic, hard wood, and metal.

The Machine

Everything on one bench.

Motion, tool changer, coolant, and the dual-bearing rotary head in a 36.6 × 28.7 × 42″ footprint. The numbers reference the photograph.

Front view of the Mira J9 — the sealed work area with the dual-bearing rotary head and spindle, and the NS-Motion monitor on its swing arm
01

The spindle

NSK Nakanishi E3000 3060 AQC — 60,000 RPM with air, 350 W, runout (spindle accuracy) under 0.001 mm. Tools mount in conical holders and clamp pneumatically. Coolant nozzles flank the collet.

02

Tool magazine

15 stations behind an automated, chip-resistant cover that shields the magazine during machining and opens on change.

03

Dual-bearing rotary head

Supported at both ends, driven through a harmonic reducer by a servo motor. The A-axis is mechanically aligned with the linear axes to maintain kinematic accuracy.

04

Tool Height Sensor

An LED contact indicator confirms the touch — tool height is measured automatically after every change.

05

NS-Motion control

The 5-axis control program. Tool changes trigger from the M6 command, the software interface, or the physical button in the work area.

Specifications / Mira J9

Full technical
specifications

Machine Overview

Model
912 Mira J9, 5-Axis
Type
Desktop Simultaneous CNC Mill
Materials
Plastic, Hardwood, Metal
Linear Axes
X, Y, Z
Rotary Axes
A, B
Codes
Universal G & M

Accuracy

Resolution
0.00001″ (0.0003 mm)
Positional Accuracy
0.0003″ (0.008 mm)
Repeatability
0.0004″ (0.010 mm)
Rotary A/B Resolution
0.10 Arc-Sec

Motion

Linear Drive
Ball Screws · Precision LM Guide
Max Feed Rate
200 in/min (5,000 mm/min)
Max Rotary Speed
300°/sec (A & B)
A Turntable
6″ (150 mm)
B Turntable
4″ (100 mm)
Backlash
Zero
Motors
AC Servo, 200W
Encoders
16-bit Absolute

Spindle

Brand
NSK Nakanishi, Japan
Model
E3000 3060 AQC
Speed (with air)
60,000 RPM
Speed (without air)
30,000 RPM
Power
350W
Runout
< 0.001 mm
Bearings
Ceramic

Tool Changer

Capacity
15 tools
System
Nakanishi QC3-K
Method
Pneumatic
Standard Collet
1/8″ (3.175 mm)
Collet Range
1.00–6.35 mm (0.1 mm steps)

Air

Filter
Built-in, 0.3 micron
Spindle Pressure
40 psi
ATC Pressure
87 psi

Coolant

Type
Liquid, self-filtered
Circulation
Continuous
Capacity
6 gal (23 L)

Working Envelope

X
4.0″ (102 mm)
Y
4.0″ (102 mm)
Z
5.0″ (140 mm)
A & B
360° continuous

Machine

Width
36.6″ (920 mm)
Depth
28.7″ (730 mm)
Height
42.0″ (1,050 mm)
Weight
660 lb (300 kg)

Power

Supply
110 or 220 VAC, 50/60 Hz
Draw
10.0 A @ 110V
Consumption
~2.0 kW

Environment

Temperature
41–113°F (5–45°C)
Humidity
30–80%
Idle Noise
≤70 dB(A)
FAQ

Common questions.

What materials does it machine?

Plastic, hard wood, and metal. Applications include rapid prototyping, watch production, microscopic sensors, biomedical components, and micro-scale structures.

How do tool changes work?

The ATC holds 15 tools behind an automated, chip-resistant cover. Changes trigger via the M6 command, through the software interface, or via a physical button in the work area. After every change, the Tool Height Sensor — an LED contact indicator that registers the touch — measures tool height.

What spindle does it use?

The NSK Nakanishi NR3060-AQC (E3000 series): 60,000 RPM with air, 30,000 RPM without, 350 watts, with runout (spindle accuracy) under 1 micron (0.001 mm). Tool clamping is pneumatic.

Does it need compressed air?

For full capability, yes. The spindle reaches 60,000 RPM with air (30,000 RPM without), tool clamping is air-powered (40 psi at the spindle, 87 psi for the ATC), and a 0.3-micron filter is built in.

How big a part can it machine?

The working volume is 4.0″ (102 mm) in X, 4.0″ (102 mm) in Y, and 5.0″ (140 mm) in Z, with both rotary axes turning 360° continuously.

How does the Quick-Release System work?

Workpieces mount to a mini pallet — in a standard vice or directly with screws — and the pallet seats on its chuck with positioning accuracy within 1 micron, so work can leave the machine and return to the same position. Custom pallets are available on request.

How does the coolant system work?

Two modes. Mist mode delivers a user-adjustable mixture of pressurized air and coolant to clear chips from the cutting zone. Coolant mode delivers low-pressure liquid coolant directly to the tool, with flow controlled by an electromagnetic valve that creates customizable pulsing intervals.

What power and space does it need?

Single-phase 110 or 220 VAC, drawing approximately 2.0 kW. The machine measures 36.6″ W × 28.7″ D × 42″ H (920 × 730 × 1,050 mm) and weighs 660 pounds (300 kg).

Next Steps

One more look, a quote, or a purchase.