HRC45 4-Flute Solid Carbide Corner Radius End Mill Ø1–12 mm for Steel
4-flute corner radius (bull nose) end mill for steel machining. Covers 1–12mm sizes, supports up to 45HRC, and delivers stable cutting with smooth radiused corners.
⚙️ Product Configurations
*Size Range: 1–12 mm diameter
*Corner Radius Options: R0.2–R3.0 (custom available)
*Flute Count: 4 Flute (standard)
*Coating Options: TiAlN / AlTiN / TiN (optional)
*Helix Angle: 30° / 35° / 45° (optional)
*Shank Type: Straight shank
*Tool Material: Ultra-fine grain solid carbide
*Workpiece Materials: Carbon steel, alloy steel, tool steel and general steel
*Machining Type: Profiling / slotting / roughing / finishing
*Cutting Edge Design: Corner radius geometry for improved edge strength and surface finish
*Tolerance: High precision (optional)
*Customization: Custom diameter, radius, flute length and overall length available
Consistent Quality
Consistent geometry across repeat orders.
سفارشهای انعطافپذیر
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
استاندارد و سفارشی
Standard sizes and custom configurations.
HRC45 4-Flute Solid Carbide Corner Radius End Mill Overview
This HRC45-series 4-flute solid carbide corner radius end mill is designed for stable roughing, semi-finishing and contour milling in carbon steel, alloy steel, mold steel and other confirmed materials within the HRC45 application range. Its reinforced corner radius provides greater edge strength than a sharp square corner while retaining a flat-bottom cutting profile. The four-flute geometry supports productive side milling, pocketing and profiling, with carbide, edge preparation and coating selected for general steel and mold-making applications.
Key Configuration
Reinforced Corner Radius
The radiused corner reduces local edge stress and chipping risk while maintaining a usable flat-bottom profile.
Four-Flute Cutting Geometry
Four cutting edges support productive side milling, profiling and semi-finishing with stable engagement.
HRC45 Steel Configuration
Carbide, edge preparation and coating are matched to general steel and mold-steel machining conditions.
Key Product Advantages
Stronger Corner
Improved corner strength compared with a sharp-edge square end mill.
Productive Engagement
Four flutes provide more cutting contacts per revolution for stable steel milling.
Precision-Ground Profile
Controlled radius geometry supports repeatable fillets and smooth profile transitions.
General Steel Series
Micro-grain carbide is configured for confirmed materials within the HRC45 range.
Recommended Milling Operations
The corner-radius profile is particularly useful where a sharp corner is unnecessary and improved tool-edge reliability is preferred.
Workpiece Material Compatibility
| MATERIAL GROUP | EXAMPLES | APPLICATION LEVEL |
|---|---|---|
| P Carbon Steel | General carbon and structural steels | Primary application |
| P Alloy & Tool Steel | Alloy steel, tool steel and mold steel | Confirm grade and hardness |
| H Mold / Pre-Hardened Steel | Confirmed mold and pre-hardened steels within the HRC45 application range | Application review required |
Product Details & Milling Demonstration
Tool Nomenclature & Dimensions
Reference dimensions and standard configurations for the HRC45 4-flute solid carbide corner radius end mill. All listed dimensions are in millimeters.
Technical Configuration
| PARAMETER | SPECIFICATION |
|---|---|
| Tool Material | Micro-Grain Solid Carbide |
| End Profile | Flat Bottom with Reinforced Corner Radius |
| Flute Count | 4 Flutes |
| Series Positioning | HRC45 General Steel & Mold-Steel Series |
| Coating Options | AlTiN / TiAlN / TiSiN / AlTiSiN / TiN / Application-Specific Coating |
| Helix Options | 30° / 35° / 45°, selected by application |
| HRC45 Carbide Reference | 0.8 μm grain size; 10% Co; 3320 N/mm² flexural strength |
| Standard DC Range | Ø1–Ø12 mm in the listed size matrix |
| Primary Materials | Carbon Steel / Alloy Steel / Mold Steel / Confirmed Pre-Hardened Steel up to the HRC45 Series Range |
| Machine Compatibility | CNC Machining Centers / Milling Machines |
| Custom Supply | Drawing-based diameter, radius, flute length, shank and overall-length configurations |
Standard Size Matrix
The configurations below are consolidated from the original product table. Model strings have been normalized to DC × R × DCON × OAL for clearer distributor and purchasing review.
| SPECIFICATION | DC | R | DCON | OAL | FLUTES |
|---|---|---|---|---|---|
| Ø1×R0.2×D4×50L | 1 | 0.2 | 4 | 50 | 4 |
| Ø1.5×R0.2×D4×50L | 1.5 | 0.2 | 4 | 50 | 4 |
| Ø2×R0.2 / R0.3 / R0.5×D4×50L | 2 | 0.2 / 0.3 / 0.5 | 4 | 50 | 4 |
| Ø2.5×R0.2 / R0.5×D4×50L | 2.5 | 0.2 / 0.5 | 4 | 50 | 4 |
| Ø3×R0.2 / R0.5×D3×50L | 3 | 0.2 / 0.5 | 3 | 50 | 4 |
| Ø3×R0.2 / R0.3 / R0.5 / R1×D4×50L | 3 | 0.2 / 0.3 / 0.5 / 1 | 4 | 50 | 4 |
| Ø4×R0.2 / R0.3 / R0.5 / R1×D4×50L | 4 | 0.2 / 0.3 / 0.5 / 1 | 4 | 50 | 4 |
| Ø5×R0.5 / R1×D6×50L | 5 | 0.5 / 1 | 6 | 50 | 4 |
| Ø6×R0.2 / R0.3 / R0.5 / R1×D6×50L | 6 | 0.2 / 0.3 / 0.5 / 1 | 6 | 50 | 4 |
| Ø6×R0.2 / R0.5 / R1×D8×60L | 6 | 0.2 / 0.5 / 1 | 8 | 60 | 4 |
| Ø8×R1.5 / R2×D8×60L | 8 | 1.5 / 2 | 8 | 60 | 4 |
| Ø10×R0.5 / R1 / R1.5 / R2 / R3×D10×75L | 10 | 0.5 / 1 / 1.5 / 2 / 3 | 10 | 75 | 4 |
| Ø12×R0.5 / R1 / R2 / R3×D12×75L | 12 | 0.5 / 1 / 2 / 3 | 12 | 75 | 4 |
Additional Product Details
Corner Radius End Mill Application Guidance
- Radius Selection: Select an R value equal to or smaller than the required part fillet.
- Side Milling: Use appropriate radial engagement to benefit from the four-flute geometry and control cutting temperature.
- Pocket Machining: Confirm center-cutting and entry capability before plunging or helical interpolation.
- Toolholding: Use a low-runout holder and minimize unnecessary overhang, especially for small DC and small R sizes.
- Chip Control: Use air blow or a suitable coolant strategy to prevent chip recutting in enclosed pockets.
HRC45 4-Flute Corner Radius End Mill Customization
Cutting diameter, corner radius, flute length, overall length, shank configuration, helix angle, cutting-edge preparation and coating can be configured for carbon steel, alloy steel and mold-steel machining. Standard and non-standard configurations are reviewed according to the workpiece grade, actual hardness, required component fillet, milling operation, tool engagement, machine rigidity and dimensional accuracy.
| PARAMETER | MANUFACTURING CAPABILITIES |
|---|---|
| Application Range | HRC45-series configuration for carbon steel, alloy steel, mold steel and selected pre-hardened steel within the confirmed application range |
| Cutting Diameter | Reference standard sizes cover selected cutting diameters from Ø1 to Ø12 mm, with intermediate and non-standard diameters reviewed according to the drawing |
| Corner Radius | Standard and drawing-defined R values can be produced according to the required component fillet, cutting-edge strength, machining allowance and surface transition |
| Flute Count | Standard 4-flute geometry for stable side milling, pocket machining, contour milling, roughing and semi-finishing operations |
| Flute Length | Standard, short-flute and drawing-defined flute lengths can be configured according to the machining depth, axial engagement and required tool rigidity |
| Reach & Overall Length | Standard and extended overall lengths can be reviewed according to the required machining reach, holder clearance and allowable tool overhang |
| Shank Configuration | Precision cylindrical shanks with standard or drawing-defined shank diameter, clamping length and cutting-section transition |
| Helix Angle | 30°, 35° or 45° helix configurations can be reviewed according to the workpiece material, cutter diameter, chip formation and milling operation |
| Corner-Radius Geometry | Reinforced transition between the end and peripheral cutting edges can be matched to the required internal fillet while retaining a flat-bottom cutting profile |
| Cutting-Edge Preparation | Rake geometry, relief geometry, edge honing and corner preparation can be adjusted according to the steel hardness, cutting load and required surface finish |
| Carbide Grade | Micro-grain solid carbide selected to balance cutting-edge toughness, wear resistance and machining stability within the HRC45 application range |
| Coating Selection | AlTiN, TiAlN, TiSiN, AlTiSiN, TiN or another application-specific coating can be selected according to the steel grade, cutting temperature, coolant method and tool-life requirement |
| Milling Application | Geometry can be optimized for side milling, pocket machining, 2D and 3D contouring, roughing and semi-finishing; full-width slotting requires additional chip-evacuation and engagement review |
| Dimensional Tolerance | Drawing-defined requirements for cutting diameter, corner radius, flute length, shank diameter, overall length, cutting-edge runout and radius-profile accuracy |
خدمات OEM و برند خصوصی
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.
FAQ & Downloads
Review common product, application and ordering questions for the HRC45 4-flute solid carbide corner radius end mill, then access the current end mill catalog and starting cutting-data guide.
Product & Application FAQs
Selection and application guidance for general steel and mold-steel milling.
What materials is this HRC45 corner radius end mill designed to machine?
It is primarily designed for carbon steel, alloy steel, mold steel and selected pre-hardened steel within the confirmed HRC45 application range. Please provide the exact material grade and hardness so the appropriate coating and cutting conditions can be reviewed.
Does HRC45 mean every tool can machine steel at exactly 45 HRC?
HRC45 indicates the product-series positioning rather than a universal machining guarantee. Actual suitability depends on the steel grade, cutting diameter, corner radius, operation, engagement, cutting data, tool overhang, holder runout and machine rigidity.
What is the advantage of the corner-radius profile?
The corner radius reinforces the transition between the end and peripheral cutting edges. It helps reduce stress concentration and edge chipping compared with a sharp-corner square end mill while retaining a flat-bottom cutting profile for pockets, steps and contour features.
How should I select the correct corner radius?
Select a cutter radius equal to or smaller than the required internal fillet on the component. A larger radius generally provides greater edge strength, but the cutter cannot produce an internal corner smaller than its own R value. A component drawing is recommended when the fillet dimension is critical.
Which operations are suitable for the 4-flute design?
The 4-flute geometry is suitable for side milling, pocket machining, contour milling, roughing, semi-finishing and selected finishing operations. Four cutting edges provide stable engagement and productive feed capability when radial engagement and chip evacuation are properly controlled.
Can this 4-flute end mill perform full-width slotting?
Selected configurations can be used for slotting, but a 4-flute cutter provides less chip space than a 2-flute tool. Use reduced cutting parameters and reliable chip removal for full-width slots. Center-cutting, ramping and plunge capability should be confirmed for the selected configuration.
Which coating should be selected for this HRC45 end mill?
AlTiN, TiAlN, TiSiN, AlTiSiN, TiN or another application-specific coating can be reviewed according to the steel grade, hardness, cutting temperature, coolant method and required tool life. Coating should be selected together with the carbide substrate and edge preparation.
Ordering & Customization FAQs
Information for distributors, tooling brands and customers requesting standard or drawing-based configurations.
What standard sizes are available?
The reference size matrix covers selected cutting diameters from Ø1 to Ø12 mm with multiple corner-radius, shank-diameter and overall-length combinations. Final availability should be confirmed using the complete DC, R, flute length, DCON and OAL specification.
Can non-standard dimensions or corner radii be manufactured?
Yes. Cutting diameter, corner radius, flute length, reach, shank diameter, overall length, cutting-edge preparation, flute geometry and coating can be customized after the tool drawing, component drawing and machining application have been reviewed.
Can I order samples before placing a wholesale order?
Yes. Sample orders can be reviewed according to the required cutting diameter, corner radius, coating and quantity. Please contact us to confirm sample availability, cost and shipping arrangements.
What is the lead time?
In-stock standard sizes are generally ready for shipment within 1–3 days. Lead time for customized or made-to-order tools is confirmed after reviewing the required dimensions, coating, order quantity and packaging requirements.
Are OEM marking and private-label packaging available?
Yes. Laser marking, customized tool codes, private labels, protective tubes and branded packaging are available for distributors, resellers and OEM orders. Final options depend on the tool dimensions, available marking area and order quantity.
What information is required for an accurate quotation?
Please provide the workpiece material and hardness, cutting diameter, corner radius, flute length, shank diameter, overall length, machining operation, axial depth ap, radial engagement ae, coating preference, dimensional tolerance and order quantity. A tool drawing or component drawing is recommended for custom projects.
Technical Downloads
Access current product-range information and starting cutting references for solid carbide end mill selection.
Solid Carbide End Mills Catalog
Product families, hardness series, flute options and reference sizes.
End Mill Speeds & Feeds Guide
Starting cutting speeds, chip loads, engagement guidance and adjustment notes.
Cutting data are starting references only. Adjust the values according to the cutting diameter, corner radius, workpiece hardness, engagement, tool overhang, holder condition and machine rigidity.
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.
