58° 4 Flute Ball Nose Carbide End Mill | 0.4μm Micro-Grain Tungsten Carbide CNC Cutter

Product Overview

The 58° 4 Flute Ball Nose Carbide End Mill is designed for precision CNC milling, curved-surface machining, and contour finishing of hard materials. Manufactured from 0.4 μm micro-grain tungsten carbide, this cutting tool combines a four-flute ball nose geometry with an optimized 30° helix angle to support stable cutting performance and consistent surface quality.

The tool is precision-ground using imported 5-axis CNC grinding equipment and grinding wheels. Its TiSiN titanium silicon nitride nano coating is designed to improve wear resistance and thermal performance during suitable high-speed machining operations. A reinforced core structure and smoothly ground spiral flutes help maintain tool rigidity and support chip evacuation.

Supplied by Changzhou Boston Tool Co., Ltd., the end mill is suitable for mold manufacturers, precision machining workshops, and CNC machining service providers. Standard sizes and customized specifications can be discussed according to workpiece materials, machining requirements, and equipment conditions.

Key Product Features and Advantages

1. 0.4 μm Micro-Grain Tungsten Carbide Substrate

• Manufactured from ultra-fine-grain tungsten carbide with a stated grain size of 0.4 μm.

• Designed to combine hardness, toughness, and wear resistance.

• Supports reliable cutting performance during suitable high-speed finishing operations.

• Helps reduce premature edge wear and tool replacement frequency when matched with appropriate cutting parameters.

2. Four-Flute Ball Nose Design

• Ball nose geometry supports machining of curved surfaces, arcs, and complex contours.

• Four-flute construction provides multiple cutting edges for suitable finishing applications.

• Suitable for precision mold machining and three-dimensional surface processing.

• The final surface finish depends on tool diameter, stepover, machine rigidity, workpiece material, and cutting conditions.

3. Optimized 30° Helix Angle

• Designed to support smooth cutting action and stable tool engagement.

• Helps facilitate chip movement through the flutes.

• Supports consistent machining of compatible metal materials.

• Can help reduce cutting instability when the tool is used within its recommended operating range.

4. TiSiN Nano Coating

• Features a titanium silicon nitride (TiSiN) coating.

• Designed to improve wear resistance and performance under elevated cutting temperatures.

• Helps reduce friction and material adhesion under suitable machining conditions.

• Supports cutting-edge durability during demanding CNC operations.

5. Precision 5-Axis Grinding

• Processed using imported 5-axis CNC grinding machines and imported grinding wheels.

• Precision grinding supports consistent cutting geometry and dimensional accuracy.

• Multi-stage inspection helps control parameters such as concentricity, dimensions, and coating appearance.

• Designed to support repeatable tool performance across production batches.

6. Reinforced Core and Smooth Flute Geometry

• Large-core design supports tool rigidity and resistance to bending.

• Smoothly ground spiral flutes help facilitate chip evacuation.

• Designed to support stable cutting during contour finishing.

• Appropriate cutting parameters and chip management remain important to prevent tool damage and surface scratching.

7. Standard Sizes and Customization

• Standard sizes are available subject to inventory confirmation.

• Non-standard diameter and flute length options can be discussed.

• Customized overall lengths and selected coating requirements may be available.

• Technical drawings and machining details help the supplier assess customization feasibility.

Technical Specifications

Note: The product name includes “58°,” but the supplied technical information does not clearly define what this angle represents. The specified helix angle is 30°. Please confirm the meaning of 58° and request the complete dimensional drawing before ordering. Tool diameter, ball radius, flute length, overall length, shank diameter, applicable hardness range, and recommended cutting parameters should also be confirmed for the selected model.

Applicable Materials

The 58° 4 Flute Ball Nose Carbide End Mill is intended for precision machining of compatible metal materials, including:

• Mold steel

• High-hardness steel within the tool's rated application range

• Stainless steel

• Cast iron

• Other compatible engineering metals

The appropriate tool grade and cutting conditions depend on the exact material grade, hardness, heat treatment, and machining strategy. Confirm suitability with the supplier when processing hardened steel or other difficult-to-machine materials.

Industry Applications

This ball nose carbide end mill can be used in precision machining applications such as:

• Mold and die manufacturing

• Plastic mold finishing

• Precision hardware component production

• Automotive component machining

• Electronic mold manufacturing

• Medical device component machining

• Aerospace precision component manufacturing

• Complex curved-surface machining

• Three-dimensional contour finishing

• CNC machining of precision parts

Recommended Machining Applications

Curved-Surface Finishing

The ball nose profile is suited to machining curved surfaces and three-dimensional contours. Toolpath planning, stepover, and cutting depth should be selected according to the required surface quality and tool geometry.

Mold and Die Machining

The combination of ball nose geometry and carbide construction makes the tool suitable for compatible mold finishing operations. Confirm the workpiece hardness and coating compatibility before machining hardened mold steel.

Precision Contour Processing

The four-flute geometry and precision-ground cutting edges support contour machining where dimensional consistency and surface finish are important.

High-Speed CNC Milling

The TiSiN coating and reinforced core are designed to support demanding cutting conditions. Actual allowable cutting speed and feed rate must be determined according to tool diameter, material, machine capability, and manufacturer recommendations.

Product Selection and Customization

Changzhou Boston Tool Co., Ltd. supports inquiries for standard and customized carbide cutting tools. To identify a suitable ball nose end mill, please provide:

1. Tool Diameter: Required cutter diameter and ball radius.

2. Tool Dimensions: Flute length, overall length, and shank diameter.

3. Workpiece Material: Material grade, hardness, and heat-treatment condition.

4. Machining Operation: Roughing, semi-finishing, finishing, or complex contour machining.

5. Machine Information: CNC machine type, spindle capability, and toolholding system.

6. Cutting Conditions: Cutting speed, feed rate, axial depth, radial engagement, and coolant method, if known.

7. Order Requirements: Required quantity, delivery schedule, and any special coating or geometry requirements.

Customized dimensions and special specifications are subject to technical assessment and confirmation.

Manufacturer Information

Changzhou Boston Tool Co., Ltd. is a precision cutting-tool manufacturer based in Changzhou, China. Founded in 2013, the company integrates research and development, production, sales, and service, with a product range that includes solid carbide drills, milling cutters, reamers, and customized special tools.

Manufacturing and Quality Capabilities

• Established in 2013: More than a decade of experience in precision cutting-tool manufacturing.

• Precision Grinding Equipment: Uses imported equipment from manufacturers including SAACKE and WALTER.

• MES Production Management: Digital production management supports process monitoring and quality control.

• Technical Development: The company reports more than 29 patents.

• OEM Experience: Supports OEM cooperation and application-specific cutting-tool requirements.

• Technical Support: Provides assistance with tool selection, machining parameters, and process optimization.

• Supply Support: Standard products may be available from stock, subject to size and inventory confirmation.

The company focuses on precision manufacturing, product consistency, and application-oriented service for industrial machining customers.

Frequently Asked Questions

Q1: What is a four-flute ball nose end mill used for?

It is commonly used for curved-surface machining, three-dimensional contour milling, mold finishing, and precision surface processing. The suitable application depends on the tool dimensions, workpiece material, and cutting conditions.

Q2: What is the advantage of a 0.4 μm micro-grain carbide substrate?

Fine-grain tungsten carbide is designed to provide a combination of hardness, toughness, and wear resistance. Performance depends on the specific carbide grade and the machining conditions.

Q3: What does the TiSiN coating do?

The TiSiN coating is intended to improve wear resistance and thermal performance under suitable cutting conditions. Its effectiveness depends on the workpiece material, cutting parameters, and coolant strategy.

Q4: Can this tool machine high-hardness steel?

It is intended for demanding machining applications, but the exact maximum workpiece hardness is not specified in the supplied technical data. Confirm the carbide grade, coating suitability, and recommended hardness range before using it on hardened steel.

Q5: Are customized dimensions available?

Customized diameters, flute lengths, overall lengths, and selected coating requirements can be discussed with the supplier. Final availability depends on technical feasibility and order specifications.

Q6: How can machining stability be improved?

Select the correct tool diameter and geometry, use a suitable toolholder, minimize unnecessary tool overhang, and follow recommended cutting parameters. Proper chip evacuation and machine rigidity also influence surface finish and tool life.

Ordering and Packaging Information

• Product: 58° 4 Flute Ball Nose Carbide End Mill

• Tool Material: 0.4 μm Micro-Grain Tungsten Carbide

• Flute Count: 4

• Helix Angle: 30°

• Coating: TiSiN

• Order Quantity: Confirm with the supplier

• Delivery Time: Depends on size, quantity, customization, and inventory

• Packaging: Protective packaging suitable for long-distance transportation

• Inspection: According to the supplier's applicable quality standards

• Payment Terms: Confirm in the quotation or sales contract

Before ordering, confirm the agreed tool dimensions, coating, inspection criteria, delivery schedule, payment terms, and applicable return conditions in writing.

Request a Quotation

For pricing, stock availability, technical drawings, or customized tooling, provide the required dimensions, workpiece material, hardness, machining operation, and order quantity.

Contact Changzhou Boston Tool Co., Ltd. to discuss your requirements for the 58° 4 Flute Ball Nose Carbide End Mill | 0.4μm Micro-Grain Tungsten Carbide CNC Cutter and confirm the appropriate configuration for your CNC machining application.