• Flat-end geometry for micro slots, narrow grooves, small cavities, and flat-bottom features
• Short flute design supports rigidity and reduces tool deflection
• 50 mm overall length with 3 mm and 4 mm shank options
• Custom dimensions, coatings, and OEM batch production available
The Dohre solid carbide micro flat end mill is a small-diameter milling cutter designed for precision machining of micro slots, narrow grooves, small cavities, flat-bottom features, and other fine details.
Compared with standard-size end mills, micro-diameter end mills require more stable tool geometry, lower cutting resistance, controlled tool overhang, and reliable dimensional consistency. The flat end geometry produces a flat bottom and is suitable for applications where slot width, bottom accuracy, side-wall quality, and fine-feature consistency are important.
Standard cutting diameters range from 0.2 mm to 0.9 mm. The listed tools have an overall length of 50 mm and are available with 3 mm or 4 mm shank diameters. Short flute lengths help maintain rigidity during small-diameter cutting and reduce the risk of excessive tool deflection.
Carbide grade, coating, flute geometry, and cutting-edge design can be selected according to the workpiece material and machining requirement. Dohre also supports non-standard micro flat end mills based on customer drawings, feature dimensions, machining depth, and surface-finish targets.
| Cutting Diameter (D) | Flute Length (Lc) | Overall Length (L) | Shank Diameter (d) |
|---|---|---|---|
| 0.2 | 0.4 | 50 | 3 |
| 0.3 | 0.6 | 50 | 3 |
| 0.4 | 0.8 | 50 | 3 |
| 0.5 | 1.0 | 50 | 3 |
| 0.6 | 1.2 | 50 | 3 |
| 0.7 | 1.4 | 50 | 3 |
| 0.8 | 1.6 | 50 | 3 |
| 0.9 | 1.8 | 50 | 3 |
| 0.2 | 0.4 | 50 | 4 |
| 0.3 | 0.6 | 50 | 4 |
| 0.4 | 0.8 | 50 | 4 |
| 0.5 | 1.0 | 50 | 4 |
| 0.6 | 1.2 | 50 | 4 |
| 0.7 | 1.4 | 50 | 4 |
| 0.8 | 1.6 | 50 | 4 |
| 0.9 | 1.8 | 50 | 4 |
Custom sizes available: Other cutting diameters, flute lengths, overall lengths, shank diameters, neck dimensions, coatings, and cutting-edge geometries can be manufactured according to customer requirements.
Dohre micro flat end mills are designed around the rigidity, cutting-edge quality, dimensional consistency, and low cutting resistance required in small-diameter CNC machining.
The solid carbide construction provides the hardness and structural stability required for micro-diameter machining. A stable carbide substrate helps maintain cutting-edge geometry during precision slotting, cavity machining, and fine-feature finishing.
The flat end cutting geometry is suitable for producing flat bottoms, narrow slots, small shoulders, fine grooves, and compact features. It is more suitable than a ball nose end mill when the machining area requires a flat bottom or a clear bottom-to-wall transition.
The standard flute length is approximately twice the cutting diameter. This compact cutting section helps reduce deflection and supports more stable machining performance when using diameters from 0.2 mm to 0.9 mm.
Precision-ground cutting edges help reduce cutting resistance and support cleaner micro features. Lower cutting force is especially important when machining thin walls, narrow grooves, small cavities, and delicate precision components.
Micro end mill performance depends on the workpiece material. Carbide grade, coating, flute design, and cutting-edge preparation can be selected for steel, stainless steel, aluminum, copper alloys, mold steel, graphite, and other precision-machining materials.
Custom cutting diameter, flute length, neck length, shank diameter, overall length, coating, flute number, and application-specific geometry are available for non-standard micro machining requirements.
Solid carbide micro flat end mills are suitable for precision components containing very small slots, cavities, grooves, shoulders, and flat-bottom features. Tool selection should be based on the workpiece material, feature depth, tool overhang, machine runout, and required surface quality.
•Micro slots and narrow grooves
•Small cavities and pocket features
•Flat-bottom precision features
•Small shoulders and side walls
•Fine contours and compact profiles
•Precision trimming and light finishing
•Small connector and interface features
| Application Area | Typical Features |
|---|---|
| 3C Electronics | Small housings, connector openings, narrow slots, compact cavities, and precision shoulders |
| Optical Modules & CPO Components | Micro cavities, fine slots, interface features, thin walls, and small-radius areas |
| Liquid Cooling Components | Small flow-channel features, sealing grooves, connector details, and narrow precision areas |
| Mold & Die | Small mold inserts, narrow cavities, fine grooves, and detailed profiles |
| Medical & Precision Components | Small instrument parts, miniature mechanisms, fixtures, and fine-feature components |
A micro flat end mill should not be selected only by diameter. Flute length, shank size, tool overhang, coating, flute number, machine spindle condition, and workpiece material can significantly affect tool life and machining accuracy.
For curved surfaces and 3D profiles, a micro ball nose end mill is usually more suitable. For side-wall machining requiring stronger corner protection, a micro corner radius end mill can be considered.
Small-diameter cutting tools require tighter control of grinding accuracy, flute symmetry, cutting-edge condition, radial runout, and dimensional consistency. Dohre combines precision CNC grinding, optical measurement, and high-magnification inspection to support stable micro end mill production.
Micro flat end mills are produced using German Walter 5-axis CNC grinding equipment. Precision-controlled grinding helps maintain consistent cutting diameter, flute geometry, cutting-edge profile, and tool symmetry.
Cutting diameter, flute length, shank diameter, overall length, edge profile, and other critical dimensions are controlled according to the product specification. Stable grinding control helps reduce dimensional variation between tools and production batches.
Walter HELICHECK PLUS measuring equipment is used to inspect tool geometry and key dimensional features. Optical measurement supports consistent micro-diameter control and repeatable production quality.
High-magnification inspection is used to check cutting-edge appearance, visible chipping, grinding marks, coating condition, and surface defects. This is especially important for micro tools because small edge defects can significantly affect cutting stability.
Dohre supports standard micro flat end mills, drawing-based custom tools, sample production, OEM requirements, and repeatable batch supply. Tool designs can be adjusted according to workpiece material, feature size, machining depth, toolholder condition, and target surface quality.
A micro flat end mill is used for machining small flat-bottom features, micro slots, narrow grooves, small cavities, precision shoulders, and other fine details that cannot be produced efficiently with standard-size end mills.
The standard sizes listed on this page range from 0.2 mm to 0.9 mm. All standard tools have a 50 mm overall length and are available with 3 mm or 4 mm shank diameters. Other sizes can be customized.
These terms are often used to describe a small-diameter end mill with a flat cutting end. “Micro flat end mill” is the more common professional product name, while “flat head end mill” may also appear in customer searches.
Micro flat end mills can be designed for steel, stainless steel, aluminum, copper alloys, mold steel, graphite, and other precision-machining materials. The carbide grade, coating, flute geometry, and cutting parameters should be selected according to the workpiece material.
Small-diameter tools have limited cross-sectional strength and are sensitive to runout, excessive cutting depth, tool deflection, unstable clamping, chip congestion, and unsuitable cutting parameters.
Use a high-precision toolholder with low runout
Keep tool overhang as short as possible
Use conservative cutting depth and stable toolpaths
Maintain effective chip or dust evacuation
Select the correct coating and flute design for the material
Choose the shortest flute length that can safely reach the machining feature. A shorter cutting section generally provides better rigidity and lower deflection. Longer flute or neck dimensions should only be used when the machining depth requires additional reach.
Yes. Dohre can customize cutting diameter, flute length, neck diameter, neck length, overall length, shank diameter, flute number, coating, and application-specific cutting geometry.
Please provide the cutting diameter, flute length, overall length, shank diameter, workpiece material, machining depth, required quantity, coating preference, machine spindle condition, and any drawing or sample information available.
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