UF(600) 4 flute long neck carbide square end mill with 0.6μm fine-grain carbide and AlCrN PVD coating, designed for deep grooves, cavities and difficult-to-machine materials including stainless steel, titanium alloys and hardened steel up to 50 HRC.
The UF(600) 4 flute long neck end mill is designed for CNC milling applications where standard-length cutters cannot reach deep or restricted features.
Made from 0.6μm fine-grain carbide and coated with a high-performance AlCrN PVD coating, the UF(600) provides excellent thermal stability, oxidation resistance and anti-adhesion performance. Its long neck configuration is suitable for deep grooves, recessed cavities, narrow pockets and other difficult-to-reach areas in stainless steel, titanium alloys and hardened steel up to 50 HRC.
Key Features
Recommended Applications
The UF(600) long neck square end mill is designed for machining features that require additional tool reach while maintaining a compact cutting section.
Deep Groove Milling
Suitable for deep grooves and slots where a standard-length end mill cannot provide sufficient reach.
Deep Pocket & Cavity Milling
The long neck configuration provides additional clearance for recessed pockets and deep cavities.
Narrow Feature Machining
Suitable for restricted machining areas where the toolholder or standard tool body may interfere with the workpiece.
Mold & Die Machining
Useful for mold inserts, deep cavities and other precision features where extended reach is required.
Difficult-to-Machine Materials
The AlCrN-coated carbide construction supports machining of stainless steel, titanium alloys and hardened steel up to 50 HRC.
Why Choose the UF(600) Long Neck End Mill?
Extended Reach for Deep Features
The long neck design provides additional clearance behind the cutting section, allowing the tool to reach deeper or more restricted machining features than a conventional square end mill.
4-Flute Square End Geometry
The 4-flute configuration is designed for stable cutting and efficient material removal while maintaining a square cutting profile for flat-bottom features and straight side walls.
0.6μm Fine-Grain Carbide
The fine-grain carbide substrate provides a balance of hardness, wear resistance and cutting stability for demanding CNC milling applications.
AlCrN PVD Coating
The AlCrN coating provides strong resistance to high-temperature oxidation and supports stable cutting performance under demanding thermal conditions.
Strong Anti-Adhesion Performance
When machining stainless steel, material adhesion and built-up edge can negatively affect tool life and surface quality. The UF(600) coating is designed to help reduce these common problems.
Designed to Solve Deep Milling Challenges
| Common Milling Problem | UF(600) Solution |
| Standard tool cannot reach the machining area | Long neck configuration provides additional reach |
| Toolholder interference in deep cavities | Reduced-neck section provides additional clearance |
| Built-up edge when machining stainless steel | AlCrN coating helps reduce material adhesion |
| Excessive cutting heat | High thermal stability for demanding conditions |
| Rapid tool wear | Fine-grain carbide supports wear resistance |
| Deep and narrow features | Long neck square geometry for restricted areas |
Long neck tools should be used with the shortest practical overhang. Excessive tool extension can reduce rigidity and increase vibration, deflection and tool breakage risk. This is a key consideration for deep machining applications.
Material Compatibility
| Workpiece Material | Recommended Application |
| Stainless Steel | Deep and restricted-feature milling |
| Titanium Alloy | Suitable for difficult-to-machine applications |
| Hardened Steel ≤50 HRC | Suitable with appropriate cutting conditions |
| Other Difficult-to-Machine Materials | Application dependent |
Actual tool performance depends on workpiece grade, hardness, tool diameter, neck length, tool overhang, machine rigidity, cutting parameters and cooling conditions.
Technical Specifications
| Parameter | Specification |
| Product Series | UF(600) |
| Tool Type | 4 Flute Long Neck Carbide Square End Mill |
| Number of Flutes | 4 |
| End Type | Square End |
| Neck Design | Long Neck |
| Substrate | 0.6μm Fine-Grain Carbide |
| Coating | AlCrN PVD |
| Recommended Materials | Stainless Steel, Titanium Alloy, Hardened Steel |
| Hardened Steel Capability | Up to 50 HRC |
| Cutting Conditions | Dry Cutting / Coolant-Assisted |
| Application | Deep Grooves, Cavities, Pockets & Restricted Features |
Dimensional Information
For long neck tools, the cutting diameter, flute length, neck diameter, effective length, shank diameter and overall length should be evaluated together.
Long Neck End Mill Selection Guide
Choosing a long neck end mill requires careful consideration of both machining reach and tool rigidity.
Determine the actual machining depth and choose the shortest practical effective length.
Choose a diameter that fits the feature while maintaining sufficient tool strength.
The neck should provide enough clearance without creating unnecessary unsupported tool length.
Longer tool overhang can increase vibration and deflection. Keep the tool extension as short as practical.
For stainless steel, titanium alloys and hardened steel, cutting parameters should be adjusted to control heat and cutting load.
Recommended Cutting Conditions
Long neck milling requires particular attention to tool rigidity, overhang and cutting load.
Recommended cutting parameters should be selected according to:
JimmyTool can provide application-specific recommendations based on your material, tool size and machining conditions.
Send us your material grade, hardness, tool diameter, required machining depth and machine conditions for a recommended starting point.
Custom Long Neck Carbide End Mills
Need a longer reach, special neck diameter or non-standard geometry?
JimmyTool can provide customized long neck carbide end mills according to your machining requirements and technical drawings.
Customization Options
OEM & Custom Tooling
Custom long neck end mills are available for deep cavities, narrow grooves, restricted machining areas and application-specific tooling requirements.
Why JimmyTool?
Fine-Grain Carbide
High-quality fine-grain carbide substrates selected for demanding CNC machining applications.
High-Performance PVD Coatings
AlCrN coating technology provides thermal stability, oxidation resistance and anti-adhesion performance.
Precision Tool Manufacturing
Controlled manufacturing processes support consistent tool geometry and dimensional accuracy.
Custom Tool Capability
Customized long neck carbide end mills are available for application-specific requirements.
Frequently Asked Questions
What is a long neck end mill used for?
A long neck end mill is designed for machining deep grooves, recessed pockets, cavities, narrow features and other areas where a standard-length end mill may not provide sufficient reach.
What is the difference between a long neck end mill and a standard end mill?
A long neck end mill has an extended reduced-neck section behind the cutting area, providing additional clearance and reach for deep or restricted features. The cutting geometry can remain relatively compact to help retain tool rigidity.
Is the UF(600) suitable for stainless steel?
Yes. Its AlCrN PVD coating provides strong anti-adhesion performance and helps reduce sticking and built-up edge during stainless steel machining.
Can the UF(600) machine titanium alloys?
Yes. The UF(600) is suitable for titanium alloys and other difficult-to-machine materials when appropriate cutting parameters are used.
Can the UF(600) machine hardened steel?
Yes. The UF(600) is suitable for hardened steel up to 50 HRC under appropriate cutting conditions.
Can the UF(600) be used for dry cutting?
Yes. The tool can be used for dry cutting as well as coolant-assisted machining depending on the workpiece and machining conditions.
Can JimmyTool customize long neck end mills?
Yes. JimmyTool can customize cutting diameter, flute length, neck dimensions, overall length, shank size, geometry and coating according to your requirements.
