Walter Helitronic Micro
Key Specifications
axes
max tool diameter
min tool diameter
max tool length
grinding spindle speed
axis system
Overview
The Walter Helitronic Micro is a 5-axis CNC tool grinding machine specifically designed for the precision grinding of micro tools — cutting tools with diameters from 0.1 mm to 12.7 mm (0.004 to 0.5 in) where sub-micron positioning accuracy and exceptional machine rigidity are required to produce the geometry tolerances demanded by medical, electronics, and precision watchmaking applications. At these diameters, conventional tool grinders lack the resolution and thermal stability to produce consistent geometry; the Helitronic Micro addresses this with a specialist design centered on micro-tool precision.
The Micro's high-precision hydrostatic axes — unlike the standard linear guide systems in production tool grinders — eliminate axis friction and provide the smooth, vibration-free motion essential for grinding 0.1 mm diameter tools without deflection or chatter. The grinding spindle operates at up to 60,000 RPM, enabling appropriate surface speeds on very small diameter grinding wheels required for micro-tool geometry. The C-axis uses an air bearing for contamination-free rotation with the positional accuracy required for precise flute spacing on tools with 5-10 µm tolerance requirements.
Walter's HELITRONIC TOOL STUDIO software provides dedicated micro-tool programming modules for standard micro-geometry types including micro-drills, micro-end mills, PCB routing tools, and medical burrs. The 3D simulation capability prevents material loss on expensive carbide micro-tool blanks — at $5-$50 each, the cost of a failed blank justifies extensive simulation time. The C.O.R.E. platform ensures the same operator interface as Walter's full-size machines.
At $350,000-$500,000 new, the Helitronic Micro is a specialized investment for cutting tool manufacturers producing micro-tools at scale and toolrooms serving the medical, dental, electronics, and precision watchmaking sectors. It competes with Rollomatic's GrindSmart 629XW and ANCA's Tool & Cutter grinders adapted for micro work in this highly specialized segment.
Full Specifications
| Parameter | Value |
|---|---|
| Axes | 5 (X, Y, Z, A, C with air bearing) |
| Max Tool Diameter | 12.7 mm (0.5 in) |
| Min Tool Diameter | 0.1 mm (0.004 in) |
| Max Tool Length | 150 mm (5.9 in) |
| Grinding Spindle Speed | Up to 60,000 RPM |
| Axis System | Hydrostatic axes (no linear guide friction) |
| C Axis | Air bearing for contamination-free precision rotation |
| Positioning Resolution | 0.1 µm |
| CNC Control | Fanuc with C.O.R.E. platform |
| Software | HELITRONIC TOOL STUDIO (micro-tool modules) |
| Machine Weight | ~4,000 kg (8,818 lb) |
| From | To |
| Newark New York | Las Vegas (LAS) |
| San Francisco | Newark/New York (EWR) |
| Los Angeles | Newark/New York (EWR) |
Strengths & Limitations
Strengths
- 0.1 mm minimum tool diameter — one of the smallest tool diameter capabilities of any production CNC tool grinder
- 60,000 RPM grinding spindle provides appropriate surface speeds for very small diameter wheels used in micro-tool geometry
- Hydrostatic axes eliminate friction and provide smooth, vibration-free motion essential for consistent micro-tool geometry
- 0.1 µm positioning resolution — appropriate for the 5-10 µm tolerance requirements of precision micro-tools
- Air bearing C-axis provides contamination-free rotation without wear over the machine's life
- HELITRONIC TOOL STUDIO micro-tool modules provide dedicated programming for PCB drills, medical burrs, and watchmaking tools
Limitations
- $350K-$500K is a significant investment for a machine limited to 12.7 mm maximum tool diameter
- 12.7 mm maximum diameter means the Micro cannot handle larger tools — a full-size grinder is needed for larger work
- Hydrostatic axes and air bearings require clean, filtered oil and air supply systems — higher infrastructure requirements
- Micro-tool grinding has a steep learning curve — small diameter grinding requires experienced operators and programmers
- Maximum 150 mm tool length constrains longer micro-tools like long PCB drills and extended-length micro-end mills
Best For
Frequently Asked Questions
01
The Helitronic Micro can grind tools as small as 0.1 mm (0.004 in) in diameter. This requires extreme machine stability, 60,000 RPM spindle speed for appropriate surface speed on micro grinding wheels, and the hydrostatic axis system to eliminate friction-induced positioning errors that would deflect a 0.1 mm tool.
02
The Micro is built for tools from 0.1 to 12.7 mm diameter with hydrostatic axes, 60,000 RPM spindle, and 0.1 µm positioning resolution. The Power is built for tools from 3 to 315 mm diameter with standard linear axes, 10,000 RPM spindle, and standard positioning accuracy. They are complementary machines — micro tools require the Micro; larger tools require the Power or Vision. A tool grinder shop serving both markets would need both machines.
03
The Helitronic Micro produces: PCB drilling and routing tools (0.1-3.0 mm), micro end mills (0.5-12.7 mm), dental burrs and files (0.5-4.0 mm), medical instrument tips and micro-drills (0.3-10 mm), watchmaking form tools and profile burrs (0.1-5 mm), and miniature reamers and step drills. The HELITRONIC TOOL STUDIO micro-tool modules include geometry libraries for these standard types.
04
Yes, Walter offers automation options for the Helitronic Micro including pallet magazines for unattended micro-tool production. Robotic loading of micro-tools requires specialized precision grippers — standard robot automation for full-size tools cannot be used. Walter's micro-tool automation solutions are designed for the small, fragile workpieces involved.
Videos
UNITED GRINDING North America
UNITED GRINDING North America
WALTER EWAG
UNITED GRINDING Group
WALTER EWAG
