保護中: OZAWA TEKKOSHO CO., LTD.

保護中: OZAWA TEKKOSHO CO., LTD.

量産技

Japan Quality

Masters of Forged & Complex Parts
Process Engineering for Stable Mass Production

保護中: OZAWA TEKKOSHO CO., LTD.

About Us

Metalworking Expertise Since 1933

OZAWA TEKKOSHO CO., LTD. is a metal machining company founded in 1933 and based in Hitachi City, Ibaraki, Japan. Centered on NC turning, we manufacture precision components for automotive, construction machinery, and other industrial applications.
We support projects from prototypes and small lots to stable mass production.

保護中: OZAWA TEKKOSHO CO., LTD.

Do you have any troubles like these?

✓Need a reliable supplier for stable mass production of forged or complex-shaped parts that are difficult to hold?
✓Facing dimensional defects or inconsistent quality in your current machining process?
✓Looking for one machining partner from prototypes and small lots through mass production?
✓Struggling with short tool life or machining defects caused by intermittent cutting?

Let us handle it!

Our Strength

From Difficult Workholding to Stable Mass Production

Our strength is turning forged and complex-shaped parts that are difficult to hold securely in a machine. For each part, we study the workholding method, custom fixtures, chucks, collets, cutting tools, machining sequence, and cutting conditions. From the prototype stage, we design the process for repeatable mass production—considering quality, tool life, productivity, and long-term stability.

FEATURED TECHNOLOGY

Mass-Production Turning for Forged & Complex Parts

We establish reliable chucking methods for forged and complex-shaped parts that are difficult to hold, enabling stable mass production. With precision machining at the core, our “Precision Machining Plus” approach combines materials, part geometries, and machining methods to create finished components. Drawing on shop-floor expertise, we combine processes including the machining of stainless steel and copper forgings, thin-wall machining, intermittent cutting, thread rolling, and other operations, completing multiple operations on a single lathe.

KEY BENEFITS
  • Custom workholding for forged and complex-shaped parts
  • Process design from prototype to mass production
  • Machining conditions developed for quality, tool life, and productivity
  • Support for intermittent cutting and difficult-to-machine materials
  • 3D printing used to study custom collets and fixtures for difficult shapes
CAPABILITIES

Production volume:

Prototypes and small lots to mass production of up to approximately 150,000 parts per month, depending on part specifications.

Typical machining range:

Ø20–Ø250 mm; up to approximately 600 mm in length.

Materials:

Carbon steel, alloy steel, stainless steel, heat-resistant steel, aluminum, copper, and rare metals.

Processes:

NC turning, grinding, broaching, chamfering, thread rolling, and related operations.

PRODUCT SPOTLIGHT

OZAWA CUT

A Parting Tool Shaped by Machining Experience

OZAWA CUT is a parting tool developed from hands-on machining experience and evaluated through actual cutting trials. We are currently testing it on magnesium and zirconium while recording material, spindle speed, feed rate, and cutting time. By building practical machining data, we continue to explore new possibilities for rare metals and difficult-to-machine materials.

OZAWA CUT parting tool

OZAWA CUT parting operation

Promotion Video

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BUSINESS ACTIVITIES

・Precision turning of forged, round, square, and complex-shaped materials
・Grinding, broaching, chamfering, thread rolling, and related machining processes
・Process planning and custom workholding for difficult-to-hold parts
・Support from prototypes and small lots to mass production

MAIN TECHNOLOGIES

■NC Turning for Forged & Complex Parts

Custom workholding and process planning for stable mass production.

■Intermittent Cutting & Difficult-to-Machine Materials

Cutting conditions optimized for tool life, accuracy, and production stability.

■Integrated Machining Capabilities

Turning integrated with secondary machining processes.

Examples of precision-machined components
Precision-machined gear component
Precision-machined shaft component
Large precision-machined component

Message

MESSAGE FROM MANAGEMENT

Since our founding in 1933, we have built lasting relationships with our customers through precision metal machining.
If you have forged or complex-shaped parts that require careful process development, please talk to us from the drawing or material stage.
From prototypes to mass production, we respond with stable manufacturing backed by Japanese quality.

保護中: OZAWA TEKKOSHO CO., LTD.

Yuta Ozawa | Executive Director

Contact us

Company

保護中: OZAWA TEKKOSHO CO., LTD.

5-4-16 Taga-cho, Hitachi City, Ibaraki 316-0003, Japan

Phone +81-294-35-2888

Company Profile

Representative
Hiroshi Ozawa, President
Established
April 1933
Capital
JPY 10 million
Employees
30, as of July 2026
Quality Management
ISO 9001:2015 / KES Step 2 SR

Corporate Website

https://www.ozwtk.com/

Our manufacturing sites

保護中: OZAWA TEKKOSHO CO., LTD.

PRODUCTION & QUALITY CONTROL

Across five factories in Hitachi City, we operate loader-equipped NC lathes and automated feeding systems for continuous production.
Our ISO 9001:2015-certified quality management system is supported by in-process dimensional checks, visual inspection, and measurement equipment for dimensional, roundness, profile, and surface-roughness evaluation.

Stable Production Backed by Five Factories in Hitachi

First Factory
First Factory (Next to Head Office)
Second Factory
Second Factory (Next to Head Office)
Third Factory
Third Factory
Fourth Factory
Fourth Factory

If you have any questions or concerns about our products, please feel free to contact us.

Contact us

保護中: OZAWA TEKKOSHO CO., LTD.

5-4-16 Taga-cho, Hitachi City, Ibaraki 316-0003, Japan

Phone +81-294-35-2888