⚙️ Thread Grinding/Polishing
(Thread Matching/Lapping)
⚙️ Thread Grinding/Polishing
(Thread Matching/Lapping)
⚙️ Thread Grinding/Polishing
(Thread Matching/Lapping)



Imagine twisting a screw into a piece of wood. The spirals on the screw need to be just right, or it won’t grip properly. Thread Grinding is about carving those spirals, or “threads,” onto metal rods with extreme accuracy. We make sure each groove is the exact shape and depth needed for a perfect fit.
But it doesn’t stop there. At M1-Seiko, we take it a step further with Lapping, a process that polishes the threads to a mirror-like finish. This ensures that every thread is not only precisely shaped but also ultra-smooth, reducing friction and wear. Whether it’s a screw, bolt, or any fastener, our combined grinding and lapping techniques guarantee a perfect grip and long-lasting durability, preventing any loosening or slipping.
Imagine twisting a screw into a piece of wood. The spirals on the screw need to be just right, or it won’t grip properly. Thread Grinding is about carving those spirals, or “threads,” onto metal rods with extreme accuracy. We make sure each groove is the exact shape and depth needed for a perfect fit.
But it doesn’t stop there. At M1-Seiko, we take it a step further with Lapping, a process that polishes the threads to a mirror-like finish. This ensures that every thread is not only precisely shaped but also ultra-smooth, reducing friction and wear. Whether it’s a screw, bolt, or any fastener, our combined grinding and lapping techniques guarantee a perfect grip and long-lasting durability, preventing any loosening or slipping.
Imagine twisting a screw into a piece of wood. The spirals on the screw need to be just right, or it won’t grip properly. Thread Grinding is about carving those spirals, or “threads,” onto metal rods with extreme accuracy. We make sure each groove is the exact shape and depth needed for a perfect fit.
But it doesn’t stop there. At M1-Seiko, we take it a step further with Lapping, a process that polishes the threads to a mirror-like finish. This ensures that every thread is not only precisely shaped but also ultra-smooth, reducing friction and wear. Whether it’s a screw, bolt, or any fastener, our combined grinding and lapping techniques guarantee a perfect grip and long-lasting durability, preventing any loosening or slipping.
Thread Grinding & Lapping
At M1-Seiko, we specialize in high-precision thread grinding, distinct from conventional industrial threads. Our exceptional products are utilized across a variety of fields, including automotive, machine tools, semiconductor manufacturing equipment, aerospace, and academic research. Our expertise is particularly recognized for prototypes and master gauges, which require extremely high precision before mass production. In recent years, our high-precision threads have also been employed in actuators for precise positioning systems.
This section introduces our expertise using Feed Screws commonly used in semiconductor manufacturing equipment as an example.
Thread Grinding & Lapping
At M1-Seiko, we specialize in high-precision thread grinding, distinct from conventional industrial threads. Our exceptional products are utilized across a variety of fields, including automotive, machine tools, semiconductor manufacturing equipment, aerospace, and academic research. Our expertise is particularly recognized for prototypes and master gauges, which require extremely high precision before mass production. In recent years, our high-precision threads have also been employed in actuators for precise positioning systems.
This section introduces our expertise using Feed Screws commonly used in semiconductor manufacturing equipment as an example.
Thread Grinding & Lapping
At M1-Seiko, we specialize in high-precision thread grinding, distinct from conventional industrial threads. Our exceptional products are utilized across a variety of fields, including automotive, machine tools, semiconductor manufacturing equipment, aerospace, and academic research. Our expertise is particularly recognized for prototypes and master gauges, which require extremely high precision before mass production. In recent years, our high-precision threads have also been employed in actuators for precise positioning systems.
This section introduces our expertise using Feed Screws commonly used in semiconductor manufacturing equipment as an example.
Feed Screws
Our feed screws are essential components in semiconductor manufacturing, performing high-speed vertical movements multiple times per second. They convert rotational motion into linear motion as illustrated, ensuring smooth and precise movement.
Backlash
To achieve unparalleled precision, our feed screws are designed to minimize backlash while maintaining minimal clearance for lubrication. Backlash is the gap between adjacent parts during rotation, which can impact performance if too tight or too loose. M1-Seiko ensures an optimal balance, providing minimal backlash without sacrificing durability or accuracy.
Multi-Start Threads
Our feed screws utilize Quad-Start Threads, which feature four thread grooves on a single screw. This design allows the screw to advance four times faster than a single-start thread, enabling quick and precise vertical movements.
Single-Start Thread: One thread groove, standard movement per rotation.
Multi-Start Thread: Multiple thread grooves, faster movement per rotation.
Quad-Start Thread: Four thread grooves, four times the movement per rotation.
Multi-start threads are complex to manufacture, but they provide exceptional accuracy and speed, making them ideal for high-precision applications.
Lapping Process
After grinding, our feed screws undergo a lapping process, where fine abrasives are applied to achieve a mirror-like finish. This ensures the highest level of smoothness and accuracy. Our skilled artisans perform hand-operated lapping, a technique that requires expert craftsmanship and cannot be easily replicated by machines.
Removal of Incomplete Threads
M1-Seiko eliminates incomplete threads at the starting point of the screw. Unlike conventional methods, we carefully remove sharp edges to prevent internal damage to the mating female thread and ensure safe and smooth assembly. This is not only for precision but also for operator safety and long-term reliability.
Feed Screws
Our feed screws are essential components in semiconductor manufacturing, performing high-speed vertical movements multiple times per second. They convert rotational motion into linear motion as illustrated, ensuring smooth and precise movement.
Backlash
To achieve unparalleled precision, our feed screws are designed to minimize backlash while maintaining minimal clearance for lubrication. Backlash is the gap between adjacent parts during rotation, which can impact performance if too tight or too loose. M1-Seiko ensures an optimal balance, providing minimal backlash without sacrificing durability or accuracy.
Multi-Start Threads
Our feed screws utilize Quad-Start Threads, which feature four thread grooves on a single screw. This design allows the screw to advance four times faster than a single-start thread, enabling quick and precise vertical movements.
Single-Start Thread: One thread groove, standard movement per rotation.
Multi-Start Thread: Multiple thread grooves, faster movement per rotation.
Quad-Start Thread: Four thread grooves, four times the movement per rotation.
Multi-start threads are complex to manufacture, but they provide exceptional accuracy and speed, making them ideal for high-precision applications.
Lapping Process
After grinding, our feed screws undergo a lapping process, where fine abrasives are applied to achieve a mirror-like finish. This ensures the highest level of smoothness and accuracy. Our skilled artisans perform hand-operated lapping, a technique that requires expert craftsmanship and cannot be easily replicated by machines.
Removal of Incomplete Threads
M1-Seiko eliminates incomplete threads at the starting point of the screw. Unlike conventional methods, we carefully remove sharp edges to prevent internal damage to the mating female thread and ensure safe and smooth assembly. This is not only for precision but also for operator safety and long-term reliability.
Feed Screws
Our feed screws are essential components in semiconductor manufacturing, performing high-speed vertical movements multiple times per second. They convert rotational motion into linear motion as illustrated, ensuring smooth and precise movement.
Backlash
To achieve unparalleled precision, our feed screws are designed to minimize backlash while maintaining minimal clearance for lubrication. Backlash is the gap between adjacent parts during rotation, which can impact performance if too tight or too loose. M1-Seiko ensures an optimal balance, providing minimal backlash without sacrificing durability or accuracy.
Multi-Start Threads
Our feed screws utilize Quad-Start Threads, which feature four thread grooves on a single screw. This design allows the screw to advance four times faster than a single-start thread, enabling quick and precise vertical movements.
Single-Start Thread: One thread groove, standard movement per rotation.
Multi-Start Thread: Multiple thread grooves, faster movement per rotation.
Quad-Start Thread: Four thread grooves, four times the movement per rotation.
Multi-start threads are complex to manufacture, but they provide exceptional accuracy and speed, making them ideal for high-precision applications.
Lapping Process
After grinding, our feed screws undergo a lapping process, where fine abrasives are applied to achieve a mirror-like finish. This ensures the highest level of smoothness and accuracy. Our skilled artisans perform hand-operated lapping, a technique that requires expert craftsmanship and cannot be easily replicated by machines.
Removal of Incomplete Threads
M1-Seiko eliminates incomplete threads at the starting point of the screw. Unlike conventional methods, we carefully remove sharp edges to prevent internal damage to the mating female thread and ensure safe and smooth assembly. This is not only for precision but also for operator safety and long-term reliability.
Why Choose M1-Seiko for Thread Grinding?
Our feed screws are not just products; they are the result of master craftsmanship combined with cutting-edge technology. Our artisans adjust the screws by feel and intuition, achieving a level of precision that surpasses machine automation. In the modern age of automated production, we believe in the unmatched accuracy of human expertise.
Why Choose M1-Seiko for Thread Grinding?
Our feed screws are not just products; they are the result of master craftsmanship combined with cutting-edge technology. Our artisans adjust the screws by feel and intuition, achieving a level of precision that surpasses machine automation. In the modern age of automated production, we believe in the unmatched accuracy of human expertise.
Why Choose M1-Seiko for Thread Grinding?
Our feed screws are not just products; they are the result of master craftsmanship combined with cutting-edge technology. Our artisans adjust the screws by feel and intuition, achieving a level of precision that surpasses machine automation. In the modern age of automated production, we believe in the unmatched accuracy of human expertise.
Comparison: Sliding Screws vs. Ball Screws
Below is a comparison of the two types of screws commonly used in precision machinery.
Comparison: Sliding Screws vs. Ball Screws
Below is a comparison of the two types of screws commonly used in precision machinery.
Comparison: Sliding Screws vs. Ball Screws
Below is a comparison of the two types of screws commonly used in precision machinery.



M1 Seiko Co., Ltd.