HRC45 4-Flute AlTiN-Coated Inch-Size Solid Carbide Square End Mill for Steel
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.
HRC45 Inch-Size Carbide Square End Mill Overview
This HRC45-series 4-flute solid carbide square end mill is designed for precision milling of carbon steel, alloy steel, tool steel and selected pre-hardened steel using fractional-inch tooling systems. Its rigid four-flute core and precision-ground square-end geometry support stable side milling, profiling, shoulder milling, pocketing, light slotting and finishing. Standard inch sizes from 1/16″ to 3/4″ are available with standard, long-flute and extended-reach configurations.
Inch-Size 4-Flute Series
Fractional-inch cutting diameters and matching inch shanks support compatibility with imperial tooling systems. Standard and extended configurations can be selected according to the required reach and machining feature.
Key Features
Fractional-Inch Sizes
Standard inch dimensions support imperial toolholders and component drawings.
Rigid 4-Flute Core
Four cutting edges support stable tooth engagement and productive steel finishing.
Square-End Accuracy
Flat-bottom geometry supports pockets, bottom surfaces and defined 90° shoulders.
Flexible Configuration
Standard, long-flute and extended-reach models are available for different features.
Product Gallery
Recommended Applications
Side Milling
Stable wall machining with controlled radial engagement and low runout.
Shoulder Milling
Square-end geometry supports flat surfaces and accurate 90° shoulders.
Pocket & Light Slotting
Selected pocketing and slotting with suitable chip evacuation and engagement.
Profile Finishing
Consistent contour finishing in carbon, alloy, tool and mold steels.
Machining Application & Product Video
HRC45 4-Flute Inch-Size End Mill Specifications
Reference specifications and fractional-inch dimensions for the HRC45 4-flute solid carbide square end mill series. Final size availability, coating, tolerance and center-cutting capability should be confirmed by selected model or approved drawing.
| PARAMETER | REFERENCE CONFIGURATION |
|---|---|
| Substrate | Fine-grain solid carbide |
| Tool Type | Square / flat-end mill |
| Flute Count | 4 flutes |
| Size System | Fractional inch |
| Cutting Diameter | 1/16″–3/4″ reference range |
| Length Options | Standard, long-flute and extended-reach configurations |
| Coating Options | TiAlN, AlTiN or application-specific coating; uncoated option by confirmation |
| Workpiece Materials | Carbon steel, alloy steel, tool steel and selected pre-hardened steel |
| Series Application | Up to HRC45 under selected machining conditions |
| Custom Options | Drawing-based diameter, flute length, shank, overall length, geometry, coating and tolerance |
Inch-Size Nomenclature
Standard Size Range
| MODEL | D | LOC | SHANK d | OAL |
|---|---|---|---|---|
| 1/16 × 1/4 × 1/8 × 1-1/2 × 4F | 1/16 | 1/4 | 1/8 | 1-1/2 |
| 1/8 × 3/8 × 1/8 × 1-1/2 × 4F | 1/8 | 3/8 | 1/8 | 1-1/2 |
| 1/8 × 1/2 × 1/8 × 1-1/2 × 4F | 1/8 | 1/2 | 1/8 | 1-1/2 |
| 5/32 × 1/2 × 5/32 × 2 × 4F | 5/32 | 1/2 | 5/32 | 2 |
| 3/16 × 5/8 × 3/16 × 2 × 4F | 3/16 | 5/8 | 3/16 | 2 |
| 1/4 × 3/4 × 1/4 × 2-1/2 × 4F | 1/4 | 3/4 | 1/4 | 2-1/2 |
| 5/16 × 13/16 × 5/16 × 2-1/2 × 4F | 5/16 | 13/16 | 5/16 | 2-1/2 |
| 3/8 × 1 × 3/8 × 2-1/2 × 4F | 3/8 | 1 | 3/8 | 2-1/2 |
| 7/16 × 2 × 7/16 × 4 × 4F | 7/16 | 2 | 7/16 | 4 |
| 1/2 × 1 × 1/2 × 3 × 4F | 1/2 | 1 | 1/2 | 3 |
| 1/2 × 1-1/4 × 1/2 × 3 × 4F | 1/2 | 1-1/4 | 1/2 | 3 |
| 1/2 × 2 × 1/2 × 4 × 4F | 1/2 | 2 | 1/2 | 4 |
| 5/8 × 2 × 5/8 × 4 × 4F | 5/8 | 2 | 5/8 | 4 |
| 3/4 × 2 × 3/4 × 4 × 4F | 3/4 | 2 | 3/4 | 4 |
Selection & Setup Guidance
Exact Shank Matching
Use an inch collet or holder that matches the confirmed shank diameter.
Minimum Overhang
Use the shortest practical projection to improve rigidity and reduce deflection.
Controlled Engagement
Reduce cutting engagement when using long-flute or extended-reach models.
Coating Selection
Match coating and cutting parameters to steel grade, hardness and coolant method.
HRC45 4-Flute Inch-Size End Mill Customization
Inch-size cutting diameter, flute length, shank diameter, overall length, helix geometry, square-end profile, cutting-edge preparation and coating can be reviewed according to the imperial drawing, steel grade, workpiece hardness, machining operation and production requirements.
Inch-Size Dimensions
Fractional cutting diameter, flute length, shank diameter and overall length can be configured according to the imperial drawing and required machining reach.
4-Flute Geometry
Core diameter, flute form, helix angle and chip space can be reviewed to balance tool rigidity, tooth engagement and surface quality during steel milling.
End & Edge Profile
Square-end geometry, center-cutting capability, corner preparation, gash geometry and cutting-edge condition can be selected according to the required milling operation.
Coating Selection
AlTiN and selected application-specific coatings can be reviewed according to the steel grade, hardness, cutting temperature, engagement and coolant conditions.
| PARAMETER | MANUFACTURING CAPABILITIES |
|---|---|
| Cutting Diameter | Standard fractional sizes from 1/32" to 3/4", with selected intermediate and non-standard inch diameters reviewed according to the tool drawing |
| Flute Count | Standard 4-flute configuration designed to support rigidity, stable tooth engagement and productive finishing in steel |
| Flute Length | Standard, long-flute and drawing-defined inch-length configurations reviewed according to feature depth, cutting engagement and tool rigidity |
| Shank Configuration | Standard fractional cylindrical shanks or drawing-defined shank diameter and clamping length |
| Overall Length | Standard and extended overall lengths from the listed inch-size series, with selected custom lengths reviewed according to machining reach |
| Helix Geometry | Standard steel-milling helix or selected application-specific geometry reviewed according to chip formation, cutting stability and surface requirements |
| Square-End Profile | Flat-bottom square-end geometry for side milling, pockets and 90° shoulders, with center-cutting capability confirmed by the selected configuration |
| Edge Preparation | Application-matched edge preparation, end-face grinding, gash geometry and corner condition reviewed according to the steel hardness and cutting load |
| Coating Selection | AlTiN or selected application-specific coating matched to the steel grade, cutting temperature, machining engagement and coolant conditions |
| Milling Application | Geometry can be reviewed for side milling, shoulder milling, profiling, pocket finishing, semi-finishing and selected light-slotting operations |
| Dimensional Tolerance | Standard production tolerances or drawing-defined inch requirements for cutting diameter, flute length, shank diameter, overall length, runout and square-end geometry |
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 HRC45 4-Flute AlTiN-Coated Inch-Size Solid Carbide Square End Mill for Steel.
What materials is this square end mill designed to machine?
Why use the 4-flute configuration for this application?
What milling operations are suitable for this square-end design?
How should the inch-size configuration be specified?
Which coating or surface treatment should be selected?
What machining conditions should be reviewed before use?
Ordering & Customization FAQs
Information for distributors, tooling brands and customers requesting standard or application-specific 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 square-end, ball-nose, 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 workpiece grade, 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.
