In modern manufacturing, the continuous advancement of technology has driven rising demands for high-performance materials. Hard and brittle materials—such as various advanced ceramics and optical glass—are experiencing surging demand in sectors like aerospace, semiconductors, optical instrumentation, automation, and petrochemicals. Prototype manufacturing and rapid delivery have become mainstream trends within the industry.
Optical glass materials (such as Zerodur, ULE, and fused silica) are commonly used in critical components like optical satellite lenses, mirrors, gyroscope housings, and semiconductor equipment. However, traditional machining methods often fall short in meeting the required levels of precision and surface roughness. High-quality surfaces and ultra-precise parts must instead rely on processes like ultra-precision grinding, polishing, or advanced lapping techniques. Some companies have already reached near world-class levels in key processes such as cutting, drilling, grinding, and polishing, and the industry’s technical capabilities are rapidly maturing.
Ceramic components (such as alumina, zirconia, Macor, silicon carbide, and aluminum nitride) stand out for their excellent electrical insulation, thermal conductivity, and mechanical strength. As a result, their applications in high-end manufacturing are becoming increasingly widespread.
Top 10 Companies in Advanced Ceramics & Optical‑Glass Machining
Insaco (USA, founded 1947)
Materials: Sapphire, optical quartz, fused silica, technical ceramics (alumina, zirconia, SiC, Si₃N₄, AlN)
Core tech: Ultra‑precision CNC machining, sub‑micron grinding and polishing with tolerances in millionths of an inch
Potential disadvantages: Small size, US-based, no advantage for extremely large parts or extremely low costs
Link: Insaco official
Top Seiko (Japan, founded 2001)
Materials: Advanced ceramics (alumina, zirconia, SiC, Si₃N₄), optical glass (quartz, borosilicate), refractory metals (W, Mo), composites
Core tech: Linear‑motor driven high‑speed milling, 5‑axis ultra‑precision CNC, deep‑hole & micro‑hole drilling
Potential drawbacks: limited production capacity and equipment resources
Link: Top Seiko official
Microbas (Sweden, founded 1958)
Materials: Glass‑ceramics, optical glass, ceramics, metals, granite
Core tech: Precision & ultra‑precision lapping, grinding, planar and slight‑curve surface finishing with sub‑micron accuracy
Potential disadvantages: Mainly limited to flat and slightly curved surface polishing, limited CNC processing capabilities for complex three-dimensional structures
Link: Microbas official
Kyocera (Japan, founded 1959)
Materials: Electronic/precision ceramics, ceramic insulators, semiconductor packaging, solar cell components
Core tech: Fine‑ceramic forming (pressing, ISP), precision cutting, sintering technologies
Potential shortcoming: The wide range of business areas leads to insufficient attention to the details of some high-end customized processing
Link: Kyocera Fine Ceramics
Precision Ceramics Ltd. (UK, founded 1992)
Materials: Engineering ceramics (alumina, zirconia, Si₃N₄, SiC, Macor)
Core tech: Custom ceramic design, precision CNC machining and grinding
Potential disadvantages: Difficult to meet ultra-large-scale production needs
Link: Precision Ceramics Ltd
Valley Design (USA, founded 1975)
Materials: Ceramics, silicon, germanium, glass, quartz, sapphire, metals
Core tech: Precision planar polishing, cutting, 4/5‑axis CNC, lapping, optical polishing, dicing
Potential disadvantages: The process is focused on flat and small and medium-sized parts
Link: Valley Design Corp
华工激光 HGLASER (China, founded 1997)
Materials: Metals, semiconductors, some glass
Core tech: High‑power fiber laser, ultrafast laser processing for cutting, welding, drilling, surface treatment
Potential shortcomings: Laser processing is mainly aimed at thin plates and surface shapes, and has limited processing capabilities for thick and large-volume parts.
Link: 华工激光官网
Advanced Glass Industries (USA, founded 1975) – now EvolvOptic
Materials: Optical & industrial glass blanks (fused quartz, silica)
Core tech: CNC blank cutting, molding, slumping, grinding, cutting; prototypes to mass blanks
Potential shortcomings: Specialized in glass blank production, lack of final ultra-precision polishing and structural function integration processing capabilities
Link: EvolvOptic (formerly AGI)
CoorsTek (USA, founded 1910)
Materials: High‑purity alumina, SiC, zirconia, structural & electronic ceramics
Core tech: Isostatic forming, cold isostatic pressing, tape casting, HIP, precision sintering and machining
Potential disadvantages: Huge production scale and complex processes may lead to long delivery times and high manufacturing costs
Link: CoorsTek
Jundro Ceramics Company Introduction (China, founded 2019)
We are a comprehensive manufacturer specializing in ultra‑precision machining of hard‑brittle materials, including advanced ceramics and optical glass. Our capabilities include:
5‑axis CNC Machining for complex geometries, round parts, and free‑form surfaces with tolerances as tight as 0.01 mm.
Cylindrical Rods & Tubes: roundness ≤ 0.001 mm; dimensional accuracy ≤ 0.001 mm.
Flat & Optical Surfaces: flatness ≤ 0.001 mm for structural parts; optical flatness ≤ 1/20 λ.
Micro‑Hole Structures: minimum diameter 0.1 mm with positional accuracy of 0.01 mm.
Surface Roughness: Ra 0.01 µm on structural parts; Ra 0.002 µm on optical parts.
We machine a wide range of materials, such as:
Technical Ceramics: alumina (Al₂O₃), aluminum nitride (AlN), zirconia (ZrO₂), silicon carbide (SiC), Macor.
Low‑Expansion Glasses: ULE, Zerodur.
Optical Glasses: CLEARCERAM‑Z, fused quartz, sapphire.
Industries Served: semiconductor, aerospace, optical instrumentation, medical devices, defense, and more.
Competitive Advantages:
One‑Stop, End‑to‑End Service: From design consultation through final inspection.
Quick Turnaround on Small Batches: Rapid prototyping and fast delivery.
Cost‑Performance Balance: Highly competitive pricing through optimized workflows.
Multi‑Material Compatibility: Seamless handling of both ceramic and optical glass projects.
Innovation‑Driven: Continuous investment in process development to stay ahead.
Certifications & Patents: ISO 9001, ISO 14001, ISO 13485, multiple material‑specific qualifications, and numerous invention patents.
Equipment: large‑travel 5‑axis CNC centers, dedicated ceramic 3‑/4‑axis machines, ultra‑precision grinders, and polishers.
Inspection Tools: CMM, optical 2D measurers, surface roughness testers, roundness meters, and laser interferometers.
Key Clients: National University of Singapore, Jabil, GE, ASM, Hikvision, and more.
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