HRC55 2-Flute Solid Carbide Micro Ball Nose End Mill for Steel with 4 mm Shank
Consistent Quality
Consistent geometry across repeat orders.
Flexible Orders
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
Standard & Custom
Standard sizes and custom configurations.
HRC55 2-Flute Solid Carbide Micro Ball Nose End Mill Overview
This HRC55-series 2-flute solid carbide micro ball nose end mill is configured for 3D contouring, small mold features, curved-surface profiling and precision finishing in carbon steel, alloy steel, pre-hardened steel and mold steel. The Ø0.3–Ø0.9 mm cutting range is combined with a standardized 4 mm shank for precision toolholding across multiple micro sizes. Two-flute geometry provides chip space and helps control cutting resistance, while application-matched TiN or AlTiN coating options support wear control under stable steel-machining conditions.
Product Configuration
Why Two Flutes for Micro Milling?
Chip Clearance
Two flutes provide chip space for small-diameter profiling and controlled material removal.
Lower Cutting Resistance
The 2-flute configuration helps limit cutting load on delicate micro cutting edges.
4 mm Precision Shank
A common shank diameter supports consistent clamping across the micro size range.
Ball-Nose Surface Generation
Full-radius geometry supports smooth toolpaths on curved and three-dimensional features.
Micro Geometry & Cutting Details
Recommended Applications
Micro 3D Contouring
Curved and freeform micro features using controlled step-over and stable engagement.
Mold & Rib Features
Small mold details, radiused transitions, ribs and narrow recessed features.
Precision Profiling
Fine contours and dimensional finishing on small steel components.
Surface Finishing
Controlled cusp generation on small curved surfaces and cavity profiles.
Micro Ball Nose End Mill Video
Specifications & Sizes
Reference specifications for the HRC55 2-flute solid carbide micro ball nose end mill with a 4 mm shank. Final flute length, ball radius, overall length, coating and dimensional tolerances should be confirmed by the selected model or approved tool drawing.
| PARAMETER | REFERENCE CONFIGURATION |
|---|---|
| Tool Type | Solid carbide micro ball nose end mill |
| Series | HRC55 steel-machining series |
| Substrate | Micro-grain solid carbide |
| Cutting Diameter D | Ø0.3–Ø0.9 mm reference range |
| Ball Radius R | Full-radius ball-nose profile; confirm radius by selected cutting diameter |
| Shank Diameter d | 4 mm |
| Flute Count | 2 flutes |
| Helix Angle | Approximately 30°, subject to selected model confirmation |
| Flute Length L1 | Defined by selected model or drawing |
| Overall Length L | Standard or customized configuration |
| Coating | TiN or AlTiN according to the confirmed product configuration and steel application |
| Workpiece Materials | Carbon steel, alloy steel, pre-hardened steel and mold steel within the confirmed application range |
| Machine Compatibility | Precision CNC machining centers and suitable high-speed milling machines |
| Dimensional Tolerance | Standard production tolerance or drawing-defined requirements for diameter, radius, flute length, shank, overall length and runout |
Selection & Setup Guidance
Control Runout
Use a clean precision collet and verify spindle, holder and shank condition before machining.
Minimize Overhang
Clamp the 4 mm shank securely and use only the projection needed to reach the feature.
Use Smooth Entry
Avoid sudden direction changes, impact loading and unnecessary dwell at the center of the ball nose.
Maintain Chip Removal
Use a consistent air, mist or coolant strategy suitable for the steel grade and coating.
HRC55 Micro Ball Nose End Mill Customization
Cutting diameter, ball radius, flute length, neck dimensions, overall length, 4 mm shank configuration, cutting-edge preparation and coating can be reviewed according to the steel grade, verified hardness, micro-milling operation, component geometry and required surface accuracy. The standard series uses a 2-flute ball-nose design with cutting diameters from Ø0.3 to Ø0.9 mm, while selected non-standard dimensions and application-specific configurations can be manufactured according to an approved drawing.
| PARAMETER | MANUFACTURING CAPABILITIES |
|---|---|
| Cutting Diameter | Standard Ø0.3–Ø0.9 mm micro range, with selected intermediate and drawing-defined diameters reviewed according to manufacturing feasibility |
| Ball Radius | Standard full-radius ball-nose geometry or drawing-defined radius requirements matched to the required 3D profile and surface condition |
| Flute Count | Standard 2-flute configuration providing chip space and controlled cutting resistance for micro contouring and profiling |
| Flute Length | Standard or drawing-defined flute length selected according to the feature depth, cutting engagement and required tool rigidity |
| Neck Configuration | Straight, reduced-neck or selected long-neck configurations reviewed according to the required reach, wall clearance and allowable tool deflection |
| Shank Configuration | Standard 4 mm precision cylindrical shank with drawing-defined clamping length and overall tool configuration |
| Overall Length | Standard or customized overall length reviewed according to machining reach, holder clearance and rigidity requirements |
| Helix Geometry | Approximately 30° standard helix or selected application-specific geometry, subject to model and engineering confirmation |
| Ball-Nose Geometry | Ball-tip profile, center-edge condition, gash geometry and cutting-edge transition reviewed for stable micro 3D machining |
| Edge Preparation | Micro cutting-edge preparation matched to the steel hardness, cutting load, required edge strength and surface-finish target |
| Coating Selection | TiN, AlTiN or another application-specific coating selected according to the steel grade, verified hardness, cutting temperature and coolant conditions |
| Milling Application | Geometry reviewed for micro 3D contouring, mold and rib features, curved-surface profiling, semi-finishing and precision finishing |
| Radius & Profile Tolerance | Standard production tolerance or drawing-defined requirements for cutting diameter, ball radius, profile accuracy and cutting-edge runout |
| Dimensional Tolerance | Drawing-defined requirements for cutting diameter, flute length, neck diameter, reach, 4 mm shank, overall length and tool runout |
OEM & Private Label Services
OEM manufacturing and private-label supply options are available for industrial distributors, tooling brands and repeat-production customers. Laser identification, label content, protective packaging and coating presentation can be configured according to the approved product specification and order requirements.
Laser Etching
Custom logos, tool codes, cutting dimensions, coating identification and batch numbers can be marked according to the available shank area.
Custom Labels & Packaging
Individual protective tubes, product labels, specification details, colored packaging tubes and private-label packaging can be reviewed.
Commercial Terms
MOQ, sample evaluation, custom-size trials, repeat orders and scheduled supply programs are confirmed according to the selected configuration.
Technical Workflow
A structured review process is used to confirm standard, customized and private-label square end mill requirements before production.
Inquiry
Submit the material, hardness, milling operation, dimensions, tolerance and quantity.
Engineering
Review flute geometry, helix angle, edge preparation, coating, ap and ae.
Commercial
Confirm quotation, MOQ, sample requirements, production schedule and delivery terms.
Production
CNC grinding, end-face formation, edge preparation, coating and laser marking.
Quality Control
Inspect diameter, flute length, shank, runout, square-end geometry and cutting edges.
Quality, Inspection & Delivery
Our solid carbide square end mills are controlled through material verification, precision grinding, in-process measurement and final inspection. Key dimensions, square-end geometry, cutting-edge condition, coating appearance and product identification are reviewed according to the approved specification or drawing before packing.
Three-Stage Quality Control
Inspection checkpoints are arranged around the manufacturing process to support dimensional consistency and repeat-order control.
Incoming Material Control
Carbide substrate grade, blank dimensions and supplied material information are checked against the production requirement.
In-Process Grinding Control
Cutting diameter, flute geometry, flute length, square-end profile and shank dimensions are monitored during CNC grinding.
Final Tool Inspection
Finished tools are reviewed for specified dimensions, runout, cutting-edge condition, coating appearance, marking and packing identification.
Key Inspection Characteristics
Inspection requirements are confirmed according to the standard product specification or the approved custom drawing.
| INSPECTION ITEM | CONTROL FOCUS | CONFIRMATION BASIS |
|---|---|---|
| Cutting Diameter (DC) | Diameter and dimensional consistency | Standard specification or approved drawing |
| Flute Length (APMX) | Effective cutting length | Confirmed product size or drawing requirement |
| Shank Diameter (DCON) | Clamping-section dimension and surface condition | Applicable shank specification |
| Overall Length (OAL) | Total tool length | Standard size matrix or approved drawing |
| Radial Runout | Concentricity between cutting section and shank | Agreed inspection requirement |
| Square-End Geometry | End-face profile, corner condition and center-cutting form | Selected tool configuration |
| Flute & Helix Profile | Flute count, helix form and grinding consistency | Approved manufacturing configuration |
| Cutting Edge & Coating | Edge condition, visible defects and coating appearance | Application-specific production requirement |
| Marking & Identification | Tool code, dimensions and batch information where applicable | Confirmed order and packaging specification |
Measurement & Batch Traceability
Optical measuring systems, tool inspection equipment and appropriate dimensional gauges are selected according to the feature being checked.
Optical Measurement
Profile and dimensional review of specified cutting features.
Runout Verification
Concentricity review based on the agreed product requirement.
Edge Inspection
Magnified review of the end face, corners and cutting-edge condition.
Batch Identification
Order, product and batch information are linked where required for repeat supply.
Protective Packaging Process
Finished end mills are protected to reduce contact between cutting edges and to support clear product identification during storage and transportation.
Bulk-Order & Export Packaging
Bulk shipments can be arranged with reinforced cartons, protective wrapping, palletized loading or export cases according to order quantity, shipment weight and agreed transportation requirements.
Delivery Coordination
Production completion, packing method and dispatch arrangements are confirmed according to the approved order. Courier, air, sea or customer-designated shipping options can be reviewed according to shipment size and destination. Final lead time is confirmed after product specifications, quantity and packaging requirements are approved.
Product & Application FAQs
Answers to common questions about selecting and applying the HRC55 2-Flute Solid Carbide Micro Ball Nose End Mill for Steel with 4 mm Shank.
What materials is this ball nose end mill designed to machine?
What operations are suitable for the ball-nose profile?
How should step-over be selected for surface finishing?
Can the tool cut at the center of the ball nose?
What affects ball-radius and profile accuracy?
What should be considered when using a micro ball nose with a 4 mm shank?
Ordering & Customization FAQs
Information for distributors, tooling brands and customers requesting standard or application-specific ball-nose configurations.
What standard sizes are available?
Can non-standard dimensions or geometry be manufactured?
Are OEM marking and private-label packaging available?
What information is required for an accurate quotation?
Technical Downloads
Use the following references for product selection and starting cutting-data review.
Solid Carbide End Mill Catalog
Review related ball-nose, square-end, corner-radius and application-specific end mill series.
End Mill Speeds & Feeds Guide
Access reference starting parameters for application review and controlled machining trials.
Need a Size or Application Review?
Send the steel grade and verified hardness, required dimensions, machining operation and quantity for configuration and quotation review.
Need Sizes, Pricing or Custom Options?
Send us the required tool type, sizes, quantities, workpiece material and any OEM or custom requirements. We will confirm suitable specifications, availability, lead time and quotation details.
Drawings, size lists and reference photos are welcome.
