
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.

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.
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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.
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| 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.
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Promotion Video

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.
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
Corporate Website
https://www.ozwtk.com/Our manufacturing sites

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
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




