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Single-point diamond turning (SPDT) is now a core process in modern ophthalmic manufacturing, used to produce high-precision contact lenses, intraocular lenses (IOLs), and complex spectacle lenses. To support the strict requirements of this industry—from direct machining of polymers to the production of high-quality molds—we provide a full line of high-grade monocrystalline diamond cutting tools.
Single-point diamond turning (SPDT) is now a core process in modern ophthalmic manufacturing, used to produce high-precision contact lenses, intraocular lenses (IOLs), and complex spectacle lenses. To support the strict requirements of this industry—from direct machining of polymers to the production of high-quality molds—we provide a full line of high-grade monocrystalline diamond cutting tools.
Litian Century manufactures custom single-crystal diamond turning tools for ultra-precision ophthalmic lens production. Our tools support the machining of contact lenses, intraocular lenses (IOLs), spectacle lenses and precision lens mold components.
Available in solid-shank and insert configurations, each tool can be manufactured according to your application, lens material, machine interface, required nose radius and surface quality target. Natural diamond and selected synthetic diamond options are available to balance edge quality, wear resistance and production cost.
Our diamond tools are built for sub-micron form accuracy and nanometer-level surface quality. They perform especially well when creating complex geometries like aspheric, diffractive, and freeform surfaces used in progressive addition lenses and advanced EDOF IOLs.
Litian Century ophthalmic diamond turning tools are developed for direct machining of compatible optical polymers and ultra-precision machining of non-ferrous mold materials. Typical workpiece materials include:
◆ PMMA and other optical-grade polymers
◆ Hydrophobic acrylic materials
◆ Hydrophilic hydrogel materials
◆ Nickel-phosphorus plated mold components
◆ Aluminum alloy mold components
For a broader introduction to production processes and applications, visit our diamond tooling solutions for the ophthalmic industry.
| Application | Typical Process | Machined Materials | Recommended Tooling |
|---|---|---|---|
| Contact lenses | Direct turning of lens blanks | PMMA, RGP materials and selected lens polymers | Roughing and finishing MCD turning tools |
| Contact lens molds | Machining mold pins and inserts | Aluminum, copper and nickel-phosphorus-coated materials | Profile and round-nose diamond tools |
| Intraocular lenses | Direct optic turning and edge processing | Hydrophobic acrylic, hydrophilic acrylic and PMMA | Ultra-fine finishing and profile tools |
| IOL haptics | Milling, drilling and contour machining | IOL-grade polymer materials | Micro diamond milling and drilling tools |
| Spectacle lenses | Prescription and freeform lens generation | CR-39, polycarbonate and high-index resin | MCD inserts and solid-shank turning tools |
| Ophthalmic molds | Spherical, aspheric and freeform mold production | Non-ferrous mold materials and NiP coatings | Custom single crystal diamond tools |
Material suitability should be confirmed according to the cutting condition, lens material state and machine configuration.
Diamond tools are used during the production of prescription, aspheric, freeform and progressive spectacle lenses. Accurate tool geometry helps maintain the designed lens profile while producing a consistent surface for subsequent finishing or polishing.
Litian Century can customize the tool radius, insert geometry and shank configuration according to the lens material, generator setup and required machining process.
Contact lens production may involve direct turning of the lens material or precision machining of the mold used to form the lens. In both processes, tool nose radius, cutting-edge quality, rake angle and waviness directly affect the finished lens geometry and surface condition.
Custom roughing and finishing tool requirements can be reviewed according to the customer’s material and machining parameters.
Intraocular lens manufacturing requires stable tool geometry and a sharp, consistent cutting edge. Litian Century provides custom diamond turning tools for IOL optical surface machining and related mold applications.
Customers can specify the lens material, required optical geometry, machine interface and dimensional tolerances when requesting a tool design.
The performance of an ophthalmic diamond tool depends on the cutting-edge condition, tool geometry, workpiece material, machine accuracy and machining parameters.
Litian Century tools are engineered to support:
◆ Low-waviness cutting edges, typically below 80 nm for applicable tool designs
◆ Machined surface roughness down to Ra ≤0.02 μm under suitable conditions
◆ Accurate reproduction of spherical, aspheric and freeform surfaces
◆ Reduced polishing requirements
◆ Stable surface quality across repeated production
◆ Longer usable tool life through suitable diamond and geometry selection
Actual machining results depend on the lens material, machine condition, setup accuracy, coolant strategy, cutting speed, feed rate and depth of cut. Performance targets should therefore be confirmed for each application rather than treated as universal values.
Ophthalmic machines and toolholders may use different interfaces, offsets and insert geometries. To avoid installation and alignment problems, Litian Century can manufacture the tool according to:
◆ Machine brand and model
◆ Toolholder drawing or interface dimensions
◆ Solid-shank or insert system
◆ Workpiece and lens material
◆ Roughing or finishing operation
◆ Required nose radius and tolerance
◆ Rake and clearance angles
◆ Target surface roughness and form accuracy
If an existing tool performs poorly, customers may also provide the current tool drawing, used tool sample or machining issue description for technical evaluation.
Each ophthalmic diamond turning tool is inspected before shipment. The cutting edge is checked under 800× magnification to identify edge defects that could affect machining quality.
Litian Century’s independent quality control process covers raw material selection, in-process inspection and finished-tool verification. Learn more about our diamond tool R&D and quality control.
For applications requiring specific inspection data, dimensional tolerances or approval drawings, include these requirements with your RFQ so they can be reviewed before production.
We offer comprehensive customization services to meet your specific machining needs:
· Tool Shank Types: Solid shank or insert style (35° / 55° insert)
· Tool Types: Including but not limited to contact lens and spectacle lens tools
· Shank Material: Tungsten carbide etc.
· Diamond Types: Natural diamond, CVD, and MCD are available, with various radii available such as R0.5, R2, and R5, and can be customized to your exact specifications
At Litian Century Diamond Tools, we are committed to providing fully customized solutions for even the most unique machining requirements. Whatever your application, please consult with us—we have the capability to manufacture the precise tool you need.
Litian Century employs cutting-edge facilities to produce and inspect our diamond tools. With over 20 years of experience, our technicians possess deep expertise in diamond craftsmanship. Continuous innovation keeps us ahead of the competition.
We offer both first-class natural diamond and advanced synthetic diamond, both essential for the superior performance and durability of our single crystal diamond turning tools. Select the ideal material for your specific needs. Leverage our innovations to ensure you're using highly efficient, reliable tools that minimize errors and lower production costs.
Quality Commitment
· All tools undergo rigorous quality inspection before shipment.
· Advanced proprietary manufacturing and measurement technologies.
· Cutting edge quality strictly inspected under 800x magnification.
· Tool re-sharpening and repair services available to extend tool life.
Tool Clamping
· Handle the tool lightly when clamping.
· Do not contact the diamond tip directly.
· After removing the Diamond Turning Tool, place it back in the tool box immediately.
· Do not leave tools exposed to avoid damaging the diamond.
Tool Cleaning
· Wipe the diamond tips gently with a clean foam stick dipped in industrial alcohol.
· Avoid excessive force or abrasive materials that could damage the cutting edge.
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 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.
