Makino iQ300
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The Makino iQ300 is a micro-precision vertical machining center purpose-built for applications requiring accuracy well beyond standard precision VMCs. With scale feedback resolution at 0.005 micron (5 nanometer), the iQ300 enters territory shared only by ultra-precision grinding machines and high-end jig borers, making it appropriate for optics mold tooling, LED light guide tooling, semiconductor component manufacturing, and advanced electronics where part geometry is measured in nanometers.
Axis travel is 350 x 300 x 250 mm (13.8 x 11.8 x 9.8 in), deliberately compact to maintain thermal stability, structural rigidity, and vibration isolation that sub-micron machining requires. The table measures 450 x 350 mm (17.7 x 13.8 in) with a 200 kg (441 lb) load capacity.
The standard spindle runs 30,000 RPM with an HSK-E40 interface, tuned for micro-milling with very small tool diameters (0.1-6 mm). Spindle runout is specified at under 1 micron, critical when cutting with sub-millimeter ball-end mills. Positioning accuracy reaches +/-0.0005 mm (0.5 micron), approximately three times better than the F5 Pro 6.
The machine structure uses polymer concrete or equivalent vibration-damping material for the base and column. Air temperature in the machine enclosure is controlled to minimize thermal variation. The Makino Pro 6 control with SGI.5 is tuned for micro-milling feed rates and short toolpaths characteristic of small precision parts.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 350 mm (13.8 in) |
| Y-Axis Travel | 300 mm (11.8 in) |
| Z-Axis Travel | 250 mm (9.8 in) |
| Max Spindle Speed | 30,000 RPM (60,000 RPM optional) |
| Spindle Taper | HSK-E32 |
| Spindle Runout | < 1 micron |
| Spindle Motor Power | 7.5/5.5 kW (10/7.4 hp) |
| Spindle Torque | 5/3.5 Nm |
| Tool Capacity | 40 |
| Tool Change Time | 1.5 sec (tool-to-tool) |
| Max Tool Diameter | 60 mm (2.4 in) |
| Max Tool Length | 100 mm (3.9 in) |
| Max Tool Weight | 0.5 kg (1.1 lb) |
| Table Size | 450 x 350 mm (17.7 x 13.8 in) |
| Table Load Capacity | 200 kg (441 lb) |
| Rapid Traverse Xyz | 20 m/min (787 ipm) |
| Positioning Accuracy | +/- 0.0005 mm (0.5 micron / 0.00002 in) |
| Repeatability | +/- 0.0003 mm (0.3 micron / 0.000012 in) |
| Scale Feedback | 0.005 micron (5 nm) resolution |
| Thermal Control | Enclosure temperature-controlled |
| Machine Weight | 4,500 kg (9,921 lb) |
| CNC Control | Makino Professional 6 (Pro 6) |
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| Metric | English |
| Spindle Rpm | 45,000 |
| Rapid Traverse Rate | 630 ipm (X / Y), 315 ipm (Z) |
| Cutting Feedrate | 630 ipm (X / Y), 315 ipm (Z) |
| Maximum Workpiece | 23.6" x 22.8" x 7.48" |
| Maximum Payload | 220 lbs |
| Maximum Tool Diameter | 0.78" |
Specifications sourced from makino.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 0.005 micron (5 nm) scale feedback resolution enables positioning that standard VMCs fundamentally cannot achieve
- 0.5 micron positioning accuracy places the iQ300 in the same accuracy class as ultra-precision grinding machines and jig borers
- HSK-E40 spindle with sub-1-micron runout enables reliable machining with sub-millimeter ball-end mills for the finest surface detail
- Enclosure temperature control minimizes thermal drift during precision micro-machining operations
- Polymer concrete base provides superior vibration damping compared to cast iron, critical for sub-micron accuracy
- 30,000 RPM standard spindle enables full surface speed for micro-tools in hardened steels and advanced ceramics
Limitations
- Small work envelope (350 x 300 x 250 mm) limits the iQ300 to small parts; it is not a general-purpose VMC
- Requires vibration-isolated foundation or active vibration isolation; ordinary shop floor vibration degrades accuracy
- Controlled-temperature environment is ideally required for sustained sub-micron performance
- HSK-E40 micro-tooling is more expensive and has a smaller supplier ecosystem than standard tooling interfaces
- Low spindle power (7.5 kW) and torque (5 Nm) makes the machine unsuitable for any significant material removal
Best For
Frequently Asked Questions
01
A new Makino iQ300 typically ranges from $400,000 to $700,000. The base machine with standard 30,000 RPM spindle starts in the $400,000-$500,000 range. The 60,000 RPM spindle option, active vibration isolation, additional tool management, and probing can bring a fully configured machine to $600,000-$700,000. Total installation including foundation, vibration isolation, and temperature control infrastructure frequently exceeds $800,000.
02
The 0.005 micron (5 nanometer) scale feedback means the iQ300's linear encoders can detect and respond to axis movements as small as 5 nanometers. For reference, a human hair is approximately 70,000 nanometers in diameter. This resolution allows corrections at a scale invisible to standard machine tools, enabling the 0.5 micron positioning accuracy specification. It is the same class of encoder technology used in semiconductor lithography equipment and high-end coordinate measuring machines.
03
The iQ300 requires either a vibration-isolated foundation or active vibration isolation mounts. At 0.5 micron positioning accuracy, ordinary shop floor vibration from nearby equipment or traffic degrades performance. Most installations use active pneumatic or piezoelectric vibration isolation. A temperature-controlled room held to +/-0.5 degrees Celsius further supports sustained sub-micron performance.
04
The iQ300 can finish-machine hardened tool steel (to 65 HRC), tungsten carbide (with diamond or CBN tooling), advanced ceramics, glass (with diamond tooling), copper and copper alloys, aluminum, and precision plastics. It is a finishing and micro-milling platform, not used for bulk material removal. Typical cutting depths range from 0.005-0.1 mm with very small tool diameters.
05
Both target the ultra-precision micro-machining segment with similar positioning accuracy. Kern's hydrostatic axis guides provide exceptional smoothness at micro-feed rates. The iQ300 differentiates on Makino's deep die/mold expertise and SGI.5 contouring, valued by shops transitioning from larger Makino platforms. The choice often comes down to distributor support, tooling ecosystem, and control system preference.
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