Single Crystal Diamond Ball Nose/Arc Milling Tools

The diamond arc milling tool, with its R-angle design, allows for better handling of curved surfaces and chamfers during the machining process, making it suitable for applications requiring high precision and smooth surfaces.

Tell us the surface finish (Ra), material and CAM-toolpath strategy — we’ll suggest the ideal ball radius and R-angle profile, and can produce small runs or tooling samples for in-house validation.

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Description
Specification
Advantages
Usage Attentions
Our Service

Description

Installed on the high-speed machining center, a single crystal diamond ball nose/arc milling tool is a kind of ultra-precision machining tool, which is mainly used in the processing of non-ferrous metals and non-metallic hard brittle materials such as nickel, copper, optical glass and silicon wafers.

Designed for flawless 3D contouring and superior surface integrity, our single-crystal diamond ball-nose and R-angle arc mills are the go-to choice for precision freeform machining. The ball-nose profile maintains a true, stable radius for complex surfaces while the R-angle arc variant combines rounded transitions with stronger edge geometry to handle chamfers and curved fillets with excellent surface finish and minimal tool wear. These tools produce smooth scallop patterns that require little to no hand finishing — a major throughput advantage for mold, optical and consumer parts.

Application:

High-precision mold & die finishing, optical lens and sensor component profiling, miniature consumer device housings, and any application that demands consistent radii and exceptional surface quality on contoured geometries.

Precision electronic parts: For example, the miniature structural components inside smart phones, wearable devices and the processing that requires machining with extremely high precision and surface finish.

Optical Element: Micro-contour and curved surface processing of optical devices such as lenses, prisms, and filters.

Key Selling Points

· True, repeatable ball radius and R-angle geometry for high-accuracy 3D profiling and mold cavities.
· Single-crystal diamond cutting faces deliver mirror finishes and resist abrasive wear in silicon-rich aluminum alloys, composites and graphitic materials.
· Optimized rake and relief for stable cutting on contoured surfaces — fewer step marks, better surface consistency between passes.

Single Crystal Diamond Milling Tools

Why Choose Us?

Compared with conventional carbide ball ends, our single-crystal diamond variants keep their radius and surface integrity longer under abrasive loading, cutting down tool changes and post-processing. We provide custom radii, length-of-cut options and balanced toolholders to integrate seamlessly into your CAM strategies.

Specification

Single Crystal Diamond Ball Nose/Arc Milling Tools
Diamond Types	Natural Diamond	Yes
Diamond Types	Synthetic Diamond	Yes
Minimum Radius		0.03mm
Maximum Radius		3mm
Arc		90°
Included Angle		20° to 30°
Rake Angle		0°
Clearance Angle		10°
Cutting Edge Waviness		0.05μm-2μm
Holder	Solid Shank	Yes
Shank Material	Tungsten	Yes
	Steel	Yes
	Molybdenum	Yes
Shank Type	Round 3.0, 3.17, 4.0, 6.0 & 6.35 mm Ø	Yes
	Minimum length 30mm	Yes
	Other Sizes Available on Request	Yes

Litian Century Diamond Tools creates all the diamond end mill cutting tools you need, radius is variety from 0.05mm to 10mm.Whatever you need, please check with us and we can make it.

Advantages:

A diamond arc milling tool is suitable for arc machining with extremely small diameter and high precision, and can achieve accurate milling of complex surfaces and contours at the micron level.

It can achieve an excellent surface roughness and is especially suitable for parts that require a mirror effect or have strict surface requirements.

Litian Century has the State-of-the-art equipment for both producing and measuring diamond milling cutters. Our technicians have been working with diamond for more than 20 years now. We are constantly innovating and driving the company years ahead of the competition.

First-class Natural Diamond (ND) and Advanced Synthetic Diamond, both available, are the essential for perfect performance and durability of our single crystal diamond milling tools. You can choose the suitable material according to your requirements. Take advantage of our innovations that will assure you are using the most efficient and reliable tools that eliminate errors and reduce production costs.

· Exceptional Cutting Performance: Made from high-quality natural diamond (ND) and advanced synthetic diamond, ensuring outstanding hardness and wear resistance for longer tool life.

· Ultra-High Surface Finish: Precision grinding achieves cutting edge waviness from 2.0μm down to <30nm, delivering mirror-like surface quality.

· Wide Range of Specifications: Available in ball nose (curved) and end mill types, with minimum radius as small as 0.03mm and maximum radius up to 10mm, meeting diverse machining needs.

· Customizable Options: Tailored sizes and shapes are available to perfectly match your machining equipment and process requirements.

Usage Attentions

1. Preparations:
• Familiarize Tool Parameters: Before using the tool, read the product manual carefully to understand the tool’s specifications, applicable materials, recommended cutting speeds, and feed rates.
• Calibrate the Machine Tool: Ensure that the machine tool is in good condition. In particular, the spindle runout, parallelism, and verticality must meet the requirements of precision machining.
• Install the Tool: Correctly install the tool onto the machine tool chuck with an appropriate tightening force. Avoid over-tightening, which may cause deformation, or under-tightening, which may lead to chatter.

2. Cooling and Lubrication:
• Use a suitable coolant or lubricant. Oil-based coolants are recommended for diamond tool machining as they can effectively reduce heat and prolong the tool's service life.

3. Initial Cutting Test:
• Before starting the machining process, conduct a light cutting test. Observe the running status of the tool and the effect of the trial machining, and adjust the cutting parameters to the optimal values.

4. Setting of Cutting Parameters:
• Cutting Speed: Set the cutting speed according to the hardness of the material and the tool's specifications. Generally, diamond tools are suitable for relatively high cutting speeds.
• Feed Rate: Set it cautiously. An excessive feed rate may cause premature wear of the tool or damage to the cutting edge.
• Depth: Increase the depth gradually in layers to avoid uneven stress on the tool caused by cutting too deep at once.

5. Monitor the Machining Process:
• During machining, pay attention to listening to the sound of the machine tool and observing the shape of the chips. Any abnormalities (such as vibrations or unusual noises) should prompt an immediate shutdown for inspection.

6. Maintenance and Care:
• After the machining process is completed, clean the tool to remove residual materials and coolant, and store it properly in a dry environment.

Our Service

Why Choose Our Single Crystal Diamond Cutting Tools?

① After-sales Services

We have professional after-sales service team and after-sales system which called "Litian Century after-sales system". This system is used to manage the information of after-sales maintenance products, and can realize the functions of inquiring the grinding progress, grinding cost and feedback of after-sales problems. Advantages of the system: "zero consultation, more time saving, more convenient, more efficient", users can log in at any time to check.

② Quality Assurance

The company is equipped with advanced inspection equipment and trained inspection personnel which assure us carry out inspections during each process. At the same time, every single tool can be sent to our customers after the professional inspection by Quality Control Center.

③ Repair Service

For the multi-way tools which can be repaired, we can bring your monocrystalline diamond tools back to "new tool" condition in a very short turnaround time. A after-sales service system is available which can let you know the condition of your repaired tools in real time.

④ Packages

We customize special packaging box for the tool, in line with the mechanical structure of the human body, that is, convenient disassembly and safe.

⑤ Delivery

We can arrange delivery your goods by air, DHL, FedEx and other ways your need.

Our products enjoy a great reputation for its good surface finish, high precision and complete product variety. We serve the customers from USA, Mexico, Germany, Belgium, Russia, South Africa, Egypt, India, Pakistan, Korea, Japan and all Southeast Asian countries.

Single Crystal Diamond Milling Tools

Get In Touch

Send us your quotation request and we will reply to you within one working day