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Ultra-Precision Molded Parts – Ultra-Precision Molded Parts and Tooling – Nagatsu Precision Mold Co., Ltd.

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High-Accuracy Molds for Micro and Mirror Surface Machining

Nagatsu Precision Mold Co., Ltd. manufactures molds for various industries with a focus on ultra-precision and micro-feature machining. Using equipment capable of nanometer-level resolution and high-speed rotation, they achieve exceptional surface finishes and tight tolerances.

Description

This offering includes ultra-precision molds processed using advanced milling, turning, and shaping technologies. Surface roughness as low as Ra 1–3 nm has been achieved on samples such as lens arrays, mirror surfaces, and Fresnel lenses. Materials processed include Ni-P plating, SUS420J2, brass, and aluminum. The use of diamond and CBN tools, along with high-resolution equipment, supports complex geometry with high consistency.

Supplier

Nagatsu Precision Mold Co., Ltd.
The company specializes in the production of precision molds for multiple sectors. It operates equipment such as the Toshiba UVM-450C and ULG-100D, which offer nanometer-scale linear drive resolution and high spindle speeds (up to 40,000 rpm). Measurement is conducted using laser probes and white light interferometry with resolution down to 0.1 nm.

Specification

Ultra-precision Machines used: Toshiba UVM-450C, ULG-100D

Workpiece Materials: SUS420J2, Ni-P plating, brass, A5052 aluminum

Surface Roughness Achieved: Ra 1–25 nm (depending on sample)

Measurement Tools: Panasonic UA3P-4, Mitaka NH-3N, Zygo NewView6200

Sample Types: Lens arrays, Fresnel lenses, mirror ball structures, flow channels

Measurement Data

Sample 1 – Machined with ULG-100D

Lens-Shaped Sample
Workpiece Material: Electroless Ni-P Plating (Surface)

Machining Method: Turning

Finishing Tool: Single-Crystal Diamond Tool

 

Sample 2 – Machined with ULG-100D

Lens Array Sample
Workpiece Material: Electroless Ni-P Plating (Surface)

Machining Method: Shaping

Finishing Tool: Single-Crystal Diamond Tool

 

 

Sample 3 – Machined with ULG-100D

Fresnel Lens Sample
Workpiece Material: Electroless Ni-P Plating (Surface)

Machining Method: Turning

Finishing Tool: Single-Crystal Diamond Tool

 

 

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Nagatsu Precision Mold Co., Ltd.
Nagatsu Precision Mold Co., Ltd.

Company Profile

Creating the Future through Precision Mold Technology

Founded in 1950, Nagatsu Precision Mold Co., Ltd. is a pioneering manufacturer in the field of high-precision injection molds for plastics. With a heritage of over 70 years, we have continually integrated advanced machining technologies with master craftsmanship to deliver world-class solutions in precision molding. Headquartered in Kawasaki City, Kanagawa Prefecture, we operate manufacturing facilities in Niigata Prefecture and maintain overseas bases in Hong Kong, China (Dongguan, Wuxi), and the Philippines.

Recognized by Japan’s Ministry of Economy, Trade and Industry (METI) as a “Local Future Leading Company” and one of “300 Dynamic Manufacturing SMEs,” we continue to innovate in the development of nano-level molds and automated manufacturing systems to meet the evolving demands of global industries.

Our Business

From Design to Mass Production — Precision, Speed, and Reliability

We specialize in the design and production of ultra-precise plastic injection molds and provide integrated services that include molding, coating, printing, and sub-assembly. Our products are widely used in the manufacturing of:

  • Structural parts and casings for IT devices and high-end SLR cameras

  • Automotive components

  • Medical devices and specialized containers

  • Customized precision parts using insert molding, magnesium molding, and complex undercuts

  • Optical components requiring high precision movement and miniaturization

Leveraging our proprietary automated design systems, cutting-edge 3D measuring equipment, and over 50 nationally certified engineers, we ensure both exceptional mold accuracy and durable performance. Our overseas plants are ISO9001 and ISO14001 certified, with our Dongguan plant also IATF16949 certified, guaranteeing reliable quality for international clients.

Global Operations

Our global network enables full-scale production and delivery across Asia.

  • Japan: Head Plant & Sales Office (Kawasaki, Kanagawa), Niigata Plant

  • China: Dongguan, Wuxi, Shenzhen

  • Hong Kong: Sales and technical support office

  • Philippines: Production base in Laguna

 

 

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Nagatsu Precision Mold Co., Ltd.

Nagatsu Precision Mold Co. Ltd.

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