• Solid carbide micro corner radius end mill for precision CNC machining
• Reinforced corner radius supports stronger cutting-edge stability
• Suitable for small shoulders, side walls, pockets, grooves, and profiles
• Short cutting section helps reduce deflection in micro-diameter machining
• Custom diameter, radius, flute length, neck size, coating, and geometry
The Dohre solid carbide micro corner radius end mill is a small-diameter milling cutter designed for precision machining of small shoulders, side walls, compact pockets, micro grooves, mold details, stepped features, and miniature profiles.
The cutting end combines a mostly flat cutting area with a defined radius between the end face and peripheral cutting edge. Compared with a micro flat end mill, the rounded transition provides stronger corner support and can reduce stress concentration at the tool tip.
Compared with a micro ball nose end mill, the corner radius design retains a flatter cutting area and is therefore more suitable for shoulders, side walls, pocket floors, stepped surfaces, and features requiring a defined bottom-corner radius rather than a fully curved surface.
Micro-diameter tools are sensitive to spindle runout, toolholder accuracy, tool overhang, cutting depth, chip congestion, and sudden tool engagement. The tool diameter, corner radius, cutting length, coating, carbide grade, and cutting geometry should be selected according to the actual workpiece and machining conditions.
Dohre supports selected standard configurations and drawing-based custom micro corner radius end mills. Cutting diameter, corner radius, flute length, neck dimensions, shank diameter, overall length, coating, flute geometry, and cutting-edge preparation can be manufactured according to confirmed requirements.
| Parameter | Available Configuration |
|---|---|
| Tool Material | Solid Carbide |
| End Geometry | Corner Radius / Bull Nose |
| Diameter Type | Micro Diameter |
| Flute Count | Selected According to Tool Diameter and Application |
| Coating | Selected According to Workpiece Material |
| Cutting Diameter D | Standard or Custom |
| Corner Radius R | Standard or Custom |
| Flute Length Lc | Customizable |
| Neck Diameter d1 | Optional / Customizable |
| Neck Length L2 | Optional / Customizable |
| Shank Diameter d | Standard or Custom |
| Overall Length L | Standard or Custom |
Send the required cutting diameter, corner radius, flute length, neck dimensions, shank diameter, overall length, workpiece material, machining depth, and required quantity. A standard configuration or custom tool design can then be evaluated according to the application.
Dohre micro corner radius end mills are designed around the cutting-edge strength, radius consistency, low cutting resistance, and dimensional control required for small-diameter precision machining.
Solid carbide provides the hardness and structural stability required for micro-diameter milling. A stable carbide substrate helps maintain the cutting diameter, corner radius, and flute geometry during precision shoulder, wall, and profile machining.
The defined corner radius strengthens the transition between the end face and peripheral cutting edge. This can reduce stress concentration compared with a sharp square corner and improve cutting-edge support during small shoulder, wall, and profile operations.
The tool retains a mostly flat end face while producing a rounded bottom-to-wall transition. It is suitable for small pockets, shoulders, stepped features, and precision surfaces where a full ball nose profile would not produce the required machining result.
Short flute options help reduce tool deflection during micro-diameter machining. The cutting length should be only as long as necessary to reach the feature because excessive flute length or tool overhang can reduce rigidity.
The corner radius and transition area are precision ground to support consistent radius geometry, profile accuracy, and repeatable machining results during batch finishing operations.
Precision-ground cutting edges help reduce cutting resistance and support cleaner material removal. Lower cutting force is particularly important when machining miniature features, thin walls, narrow pockets, and delicate precision components.
Carbide grade, coating, flute geometry, edge preparation, and flute count can be selected according to the workpiece material. Different configurations can be developed for steel, stainless steel, aluminum, copper alloys, mold steel, graphite, and other precision-machining materials.
Dohre supports custom cutting diameter, corner radius, flute length, neck diameter, neck length, shank diameter, overall length, coating, flute geometry, laser marking, packaging, and OEM production.
Solid carbide micro corner radius end mills are suitable for precision components containing small shoulders, side walls, compact pockets, radius transitions, fine grooves, miniature steps, and detailed profiles. Tool selection should consider the workpiece material, feature depth, radius requirement, tool overhang, spindle runout, and target surface quality.
• Small shoulders and straight side walls
• Compact pockets with radius transitions
• Micro grooves and stepped features
• Miniature mold profiles and inserts
• Fine contours and small profile features
• Light semi-finishing and precision finishing
• Thin-wall and delicate component machining
• Small features requiring stronger corner protection
| Application Area | Typical Machining Features |
|---|---|
| Mold & Die | Small mold inserts, detailed shoulders, radius transitions, fine walls, and compact profile features |
| 3C Electronics | Small housings, connector features, compact pockets, precision shoulders, and miniature profiles |
| Optical Modules & CPO Components | Micro cavities, interface profiles, positioning areas, small shoulders, and radius transition features |
| Medical & Precision Components | Miniature instrument parts, compact mechanisms, small side walls, and precision profile finishing |
| Liquid Cooling Components | Small sealing features, connector details, narrow profiles, and compact radius transitions |
| Graphite Electrodes | Detailed electrode profiles, small-radius transitions, mold features, and precision contouring with suitable coating |
| Custom Precision Parts | Prototype components, small fixtures, miniature shoulders, compact pockets, and application-specific profiles |
| Tool Geometry | Primary Machining Result | Typical Selection |
|---|---|---|
| Micro Flat End Mill | Flat bottom and relatively sharp transition | Micro slots, flat pockets, grooves, and small shoulders |
| Micro Ball Nose End Mill | Curved surface and continuous 3D contour | Mold cavities, freeform profiles, arc surfaces, and 3D finishing |
| Micro Corner Radius End Mill | Mostly flat surface with a reinforced rounded corner | Shoulders, side walls, stepped features, pockets, and stronger corner support |
For flat-bottom features and narrow slots, review the solid carbide micro flat end mill.
For curved surfaces, 3D contours, and mold cavities, review the solid carbide micro ball nose end mill.
Micro corner radius end mills require precise control of the cutting diameter, corner radius, flute symmetry, cutting-edge condition, radial runout, and dimensional consistency. Small variations can significantly affect tool life, profile accuracy, and batch machining results.
Micro corner radius end mills are produced using German Walter five-axis CNC grinding equipment. Precision-controlled grinding helps maintain consistent flute geometry, corner radius formation, cutting-edge profile, and tool symmetry.
The corner radius must transition smoothly between the end face and peripheral cutting edge. Cutting diameter, radius size, relief geometry, flute profile, and edge preparation are controlled together to support consistent machining results.
Cutting diameter, corner radius, flute length, neck dimensions, shank diameter, overall length, and cutting-edge profile are controlled according to the confirmed tool specification. Stable grinding control helps reduce variation between individual tools and production batches.
Walter HELICHECK PLUS measuring equipment is used to inspect tool geometry and important dimensional features. Optical profile measurement supports consistent radius control, cutting-diameter accuracy, flute geometry, and repeatable batch production.
High-magnification inspection is used to evaluate visible edge chipping, radius condition, grinding marks, coating appearance, and surface defects. Small cutting-edge defects can have a significant effect on micro-diameter tool performance.
Controlled shank dimensions, tool symmetry, cutting-edge geometry, and grinding processes help reduce variation during batch production. Final machining performance also depends on spindle condition, toolholder runout, tool overhang, workholding, and cutting parameters.
Dohre supports standard tool supply, drawing-based custom micro corner radius end mills, sample production, application testing, OEM orders, private-label production, laser marking, customized packaging, and stable batch supply.
It is used for small shoulders, side walls, compact pockets, stepped features, micro grooves, mold details, and miniature profiles requiring a mostly flat cutting surface with a reinforced rounded corner.
A micro flat end mill produces a flat bottom with a relatively sharp bottom-to-wall transition. A micro corner radius end mill produces a mostly flat surface with a rounded corner transition that provides stronger cutting-edge support.
A micro ball nose end mill has a fully rounded cutting end and is used for curved surfaces, freeform profiles, and three-dimensional contours. A micro corner radius end mill retains a flatter cutting area and uses a smaller radius only at the cutting corner.
The radius should match the component drawing, internal corner requirement, cutting diameter, remaining allowance, and required cutting-edge strength. A larger radius can provide stronger corner support but may not fit a small internal feature.
No. The tool produces a rounded transition corresponding to its corner radius. A micro flat end mill or another finishing process is required when the component needs a sharper internal bottom corner.
Micro-diameter tools have limited cross-sectional strength and are sensitive to runout, excessive cutting depth, tool deflection, unstable clamping, chip congestion, unsuitable toolpaths, and excessive overhang.
• Use a high-precision toolholder with low runout
• Keep tool overhang as short as possible
• Use suitable axial and radial cutting depths
• Avoid sudden entry and unstable engagement
• Maintain effective chip or dust evacuation
• Select the correct carbide, coating, and geometry for the material
Select the shortest flute length that can safely reach the machining feature. A shorter cutting section normally provides better rigidity and lower tool deflection. Longer flute or neck dimensions should only be used when required by the feature depth.
Material-specific versions can be developed for steel, stainless steel, aluminum, copper alloys, mold steel, graphite, and other precision-machining materials. Carbide grade, coating, flute geometry, and cutting-edge preparation should be selected according to the workpiece.
Yes. Cutting diameter, corner radius, flute length, neck diameter, neck length, shank diameter, overall length, flute number, carbide grade, coating, cutting-edge design, marking, and packaging can be customized.
Provide the required cutting diameter, corner radius, flute length, neck dimensions, shank diameter, overall length, workpiece material, machining feature, cutting depth, machine conditions, required quantity, coating preference, and any available drawing or sample.
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