⚙️ Internal Thread Processing

⚙️ Internal Thread Processing

⚙️ Internal Thread Processing

Think of a screw that needs to twist smoothly into a bolt. If the grooves, or “threads,” aren’t perfectly shaped, it won’t fit tightly or could even get stuck. At M1-Seiko, we create these threads with extreme precision to ensure a perfect fit every time.

We also use a process called Lapping to polish the threads, making them super smooth. This reduces friction, prevents wear, and ensures the threads move seamlessly. Whether it’s for screws, bolts, or complex parts that require precise rotation, our fitting thread processing guarantees accuracy and durability.

Think of a screw that needs to twist smoothly into a bolt. If the grooves, or “threads,” aren’t perfectly shaped, it won’t fit tightly or could even get stuck. At M1-Seiko, we create these threads with extreme precision to ensure a perfect fit every time.

We also use a process called Lapping to polish the threads, making them super smooth. This reduces friction, prevents wear, and ensures the threads move seamlessly. Whether it’s for screws, bolts, or complex parts that require precise rotation, our fitting thread processing guarantees accuracy and durability.

Think of a screw that needs to twist smoothly into a bolt. If the grooves, or “threads,” aren’t perfectly shaped, it won’t fit tightly or could even get stuck. At M1-Seiko, we create these threads with extreme precision to ensure a perfect fit every time.


We also use a process called Lapping to polish the threads, making them super smooth. This reduces friction, prevents wear, and ensures the threads move seamlessly. Whether it’s for screws, bolts, or complex parts that require precise rotation, our fitting thread processing guarantees accuracy and durability.

Internal Thread Processing

At M1-Seiko, we specialize in high-efficiency internal thread processing, utilizing our extensive expertise and advanced CNC lathes designed specifically for this purpose. Through the development of optimized programs and specialized equipment, we have achieved exceptional efficiency and precision. Our innovations also play a vital role in preserving and transferring artisan-level craftsmanship to future generations.

Internal Thread Processing

At M1-Seiko, we specialize in high-efficiency internal thread processing, utilizing our extensive expertise and advanced CNC lathes designed specifically for this purpose. Through the development of optimized programs and specialized equipment, we have achieved exceptional efficiency and precision. Our innovations also play a vital role in preserving and transferring artisan-level craftsmanship to future generations.

Internal Thread Processing

At M1-Seiko, we specialize in high-efficiency internal thread processing, utilizing our extensive expertise and advanced CNC lathes designed specifically for this purpose. Through the development of optimized programs and specialized equipment, we have achieved exceptional efficiency and precision. Our innovations also play a vital role in preserving and transferring artisan-level craftsmanship to future generations.

Dedicated CNC Lathe for Internal Threads

To ensure the highest accuracy in precision feed screws and positioning screws used in automotive, semiconductor, and machine tool industries, it is crucial to maintain exceptional precision in both internal and external threads. Our dedicated CNC lathe achieves this through:

  • Core Machine Modifications: Adjustments to rotation speed and torque for optimized performance.

  • Precision Programming: Fine-tuned cutting depth, feed rate, and speed, integrating decades of accumulated knowledge.

  • Custom Diamond Cutting Tools: Developed in-house to enhance efficiency and precision.


Through these innovations, M1-Seiko has achieved labor savings and higher efficiency in internal thread processing, delivering products that meet the highest industry standards.

Dedicated CNC Lathe for Internal Threads

To ensure the highest accuracy in precision feed screws and positioning screws used in automotive, semiconductor, and machine tool industries, it is crucial to maintain exceptional precision in both internal and external threads. Our dedicated CNC lathe achieves this through:

  • Core Machine Modifications: Adjustments to rotation speed and torque for optimized performance.

  • Precision Programming: Fine-tuned cutting depth, feed rate, and speed, integrating decades of accumulated knowledge.

  • Custom Diamond Cutting Tools: Developed in-house to enhance efficiency and precision.


Through these innovations, M1-Seiko has achieved labor savings and higher efficiency in internal thread processing, delivering products that meet the highest industry standards.

Dedicated CNC Lathe for Internal Threads

To ensure the highest accuracy in precision feed screws and positioning screws used in automotive, semiconductor, and machine tool industries, it is crucial to maintain exceptional precision in both internal and external threads. Our dedicated CNC lathe achieves this through:

  • Core Machine Modifications: Adjustments to rotation speed and torque for optimized performance.

  • Precision Programming: Fine-tuned cutting depth, feed rate, and speed, integrating decades of accumulated knowledge.

  • Custom Diamond Cutting Tools: Developed in-house to enhance efficiency and precision.


Through these innovations, M1-Seiko has achieved labor savings and higher efficiency in internal thread processing, delivering products that meet the highest industry standards.

Near Lapping-Grade Surface Finish

Our CNC lathe can achieve a surface roughness equivalent to lapping, with a finish of approximately ▽▽▽▽ grade. While a final lapping process is recommended to ensure seamless fitting with external threads, initial measurements using surface roughness testers show that our automated processing alone can achieve near-lapping quality.


Government Support & Recognition

This development project was supported by the Tokyo Metropolitan Government through the following grants:

  • FY2011: Competitive Strengthening Subsidy for Small and Medium-sized Manufacturing Enterprises — "Development of a Dedicated NC Lathe for High-Precision Internal Threads"

  • FY2013: Competitive Strengthening Subsidy for Small and Medium-sized Manufacturing Enterprises — "Development of Tools for Internal Thread Cutting"

Near Lapping-Grade Surface Finish

Our CNC lathe can achieve a surface roughness equivalent to lapping, with a finish of approximately ▽▽▽▽ grade. While a final lapping process is recommended to ensure seamless fitting with external threads, initial measurements using surface roughness testers show that our automated processing alone can achieve near-lapping quality.


Government Support & Recognition

This development project was supported by the Tokyo Metropolitan Government through the following grants:

  • FY2011: Competitive Strengthening Subsidy for Small and Medium-sized Manufacturing Enterprises — "Development of a Dedicated NC Lathe for High-Precision Internal Threads"

  • FY2013: Competitive Strengthening Subsidy for Small and Medium-sized Manufacturing Enterprises — "Development of Tools for Internal Thread Cutting"

Near Lapping-Grade Surface Finish

Our CNC lathe can achieve a surface roughness equivalent to lapping, with a finish of approximately ▽▽▽▽ grade. While a final lapping process is recommended to ensure seamless fitting with external threads, initial measurements using surface roughness testers show that our automated processing alone can achieve near-lapping quality.


Government Support & Recognition

This development project was supported by the Tokyo Metropolitan Government through the following grants:

  • FY2011: Competitive Strengthening Subsidy for Small and Medium-sized Manufacturing Enterprises — "Development of a Dedicated NC Lathe for High-Precision Internal Threads"

  • FY2013: Competitive Strengthening Subsidy for Small and Medium-sized Manufacturing Enterprises — "Development of Tools for Internal Thread Cutting"

At M1-Seiko, we continue to push the boundaries of precision engineering, combining traditional craftsmanship with cutting-edge technology to deliver products that outperform expectations in even the most demanding applications.

At M1-Seiko, we continue to push the boundaries of precision engineering, combining traditional craftsmanship with cutting-edge technology to deliver products that outperform expectations in even the most demanding applications.

At M1-Seiko, we continue to push the boundaries of precision engineering, combining traditional craftsmanship with cutting-edge technology to deliver products that outperform expectations in even the most demanding applications.

M1 Seiko Co., Ltd.

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