セイコーインスツル List of Products and Services

Based on the technology cultivated in watch manufacturing, we propose various grinding machines that achieve precision and high-speed processing. With expert craftsmanship, we provide compact and energy-efficient internal grinding machines that are friendly to the factory environment.

The "SIG02α II" is an evolved fully automatic internal grinding machine that inherits the SIG series, boasting a sales record of over 2,000 units. In addition to the well-established 2-roller 1-shoe spindle, a 2-shoe 1-magnet spindle is also available. It features a high-rigidity static pressure guide surface on the table guide. Moreover, it has successfully achieved significant miniaturization of the machine body, allowing it to accommodate workpiece outer diameters ranging from φ8mm to φ40mm and φ30mm to φ62mm, depending on the spindle type. 【Features】 ■ Centerless type for bearing processing ■ High-rigidity static pressure guide surface on the table guide ■ Capable of handling workpiece outer diameters from φ8mm to φ40mm and φ30mm to φ62mm ■ Significant miniaturization of the machine body achieved ■ Body dimensions: 1,240mm(W) × 1,220mm(D) × 1,800mm(H) *For more details, please refer to the PDF document or feel free to contact us.

This is the introduction of a high-precision, high-efficiency internal grinding machine developed based on the tradition and experience since the founding of Seiko Instruments Inc.!

The "SIG-S II" is a compact, environmentally friendly high-precision and high-efficiency internal grinding machine. It features a hydraulic-free design and a table ball screw lubrication-free system. The combination of block-built units allows for versatile processing. It is suitable for workpieces such as gasoline and diesel injection nozzles and pumps, with processing specifications using a diaphragm chuck spindle. 【Features】 ■ Chuck type for automotive parts processing ■ Versatile processing possible with a combination of block-built units ■ Table ball screw lubrication-free ■ Hydraulic-free ■ Main body dimensions: 1,550mm(W) x 1,270mm(D) x 1,900mm(H) *For more details, please refer to the PDF document or feel free to contact us.

The "SIG-Evo1s/2s" is a fully automatic high-precision internal grinding machine that pursues high processing accuracy and productivity. The "SIG-Evo2s" is equipped with two grinding spindle axes to accommodate complex machining. It employs oil hydrostatic guidance for the spindle and grinding spindle table, enabling high-speed and high-precision position control with linear motor drive. Furthermore, with 2-axis linear interpolation control, it can handle tapered surfaces at arbitrary angles, making setup work easier. 【Features】 ■ Chuck type for automotive parts processing ■ Oil hydrostatic guidance for the spindle and grinding spindle table ■ High-speed and high-precision position control with linear motor drive ■ Built-in motor type oil hydrostatic and dynamic pressure hybrid bearing spindle ■ Main body dimensions: 1,600mm(W) × 1,700mm(D) × 1,400mm(H) *For more details, please refer to the PDF document or feel free to contact us.

The "SIG-2S II/SIG-3S II" is a high-precision internal grinding machine characterized by multiple grinding spindle axes. With 1 chuck and 2 spindles, it enables versatile grinding. The processing specification features a diaphragm chuck spindle. It can be used for machining automotive parts such as gasoline and diesel injection nozzles and pumps. 【Features】 ■ For automotive parts machining ■ Versatile grinding with 1 chuck and 2 spindles ■ Diaphragm chuck spindle ■ Main body dimensions ・SIG-2S II: 2,100mm(W)×1,600mm(D)×1,950mm(H) ・SIG-3S II: 2,900mm(W)×3,900mm(D)×2,300mm(H) *For more details, please refer to the PDF document or feel free to contact us.

The "SG2-C/R" is a space-saving internal grinding machine that inherits the "SG1-IB" and is capable of mounting a chuck spindle. It supports various machining processes, such as sheet surfaces, with 2-axis interpolation control. The grinding wheel spindle can be mounted to rotate from 80,000 to 180,000 RPM. Additionally, it accommodates various applications such as a front sizing device and an AE sensor-equipped dressing device, achieving significant miniaturization compared to conventional chuck-type machines. 【Features】 ■ Chuck and centerless for automotive parts processing ■ Equipped with a high-precision chuck spindle ■ Grinding wheel spindle can be mounted to rotate from 80,000 to 180,000 RPM ■ Equipped with a servo motor-driven 2-arm loader for high-speed feeding ■ Main body dimensions: 850mm(W) × 1,162(D) × 1,580(H) *For more details, please refer to the PDF document or feel free to contact us.

The product, the compact universal internal grinding machine "STG-3NX," is a CNC internal grinding machine that enables high-precision and high-efficiency processing despite its compact size. Since its launch in 2009, the "STG-3NX" has received high praise as a successor model to the small internal grinding machine "STG-3N," which is equipped with a 3-inch/4-inch chuck. It retains the advantages of space-saving, high rigidity, and low center of gravity structure while expanding the internal space by extending the stroke of the spindle base table, thereby improving workpiece loading and unloading as well as in-machine measurement operations. Additionally, it is equipped with a high-output, high-rigidity self-developed high-frequency spindle "H Series," contributing to the improvement of customer productivity through high-precision and high-efficiency processing. 【Features】 ■ The stroke of the spindle base table is extended by 33%, expanding the internal space. ■ Achieves high-precision and high-efficiency processing. ■ Improved operability based on ergonomic layout. ■ Equipped with FANUC NC device (FIELD system compatible). *To evaluate the capabilities of the STG-3NX, we offer test processing of specified workpieces free of charge in principle. Please contact us through the site or form below.

A "grinding machine" is equipment used to process workpieces by pressing a high-speed rotating grinding wheel against the material to be machined. Since it processes by grinding away the surface, it takes longer to achieve the desired shape compared to cutting processes that involve cutting the material. However, because it grinds slowly and gradually, it can achieve high precision. It is commonly used in the finishing process to enhance surface accuracy after shaping the workpiece into the desired form through cutting processes. 【Features】 ■ Presses a high-speed rotating grinding wheel against the material to be processed ■ Used in the finishing process to enhance surface accuracy ■ Manual grinding machine: Small, handheld for processing materials ■ Machine grinding machine: Installed in factories such as manufacturing industries *For more details, please refer to the related links or feel free to contact us.

The grinding machine can be classified according to the purpose of processing and the shape of the material to be processed. The "surface grinding machine" is primarily equipment for performing surface grinding, and it can be used for various types of grinding depending on the direction of movement of the workpiece and the way the grinding wheel is applied. In addition, there are "internal grinding machines" for performing internal grinding, "cylindrical grinding machines" that rotate the grinding wheel in the opposite direction to the workpiece, "centerless grinding machines," and "tool grinding machines." [Types of Grinding Machines (Excerpt)] ■ Surface Grinding Machine - Achieves both high dimensional accuracy and high precision surface roughness - Capable of achieving high flatness and parallelism on both sides of the workpiece ■ Internal Grinding Machine - Standard type: Both the workpiece and the grinding wheel are rotated while the grinding wheel is moved back and forth - Planetary type: The workpiece is fixed while only the grinding wheel rotates *For more details, please refer to the related links or feel free to contact us.

There are various types of grinding machines. In recent years, as products have become more complex and compact, the components required have also needed to be smaller and more precise, leading to a demand for high precision and efficiency in the grinding machines used to process them. Additionally, from the perspective of environmental and space efficiency, it is necessary to reduce the footprint of the equipment itself without compromising performance. If you choose a domestic manufacturer that offers comprehensive support from before to after installation, you can easily consult them and alleviate any concerns. 【Types of Grinding Machines】 ■ Surface Grinding Machine ■ Internal Grinding Machine ■ Cylindrical Grinding Machine ■ Centerless Grinding Machine ■ Tool Grinding Machine *For more details, please refer to the related links or feel free to contact us.

Internal grinding is a type of grinding process that involves grinding the inner surface of cylindrical workpieces. In various industries such as automotive, home appliances, and information devices, where high functionality and complex internal structures are advancing, there is a demand for small, high-precision parts. In internal grinding used for processing these parts, a balance between high processing accuracy and productivity is desired. Additionally, beyond processing accuracy, the equipment itself for internal grinding machines must also meet various requirements. [Challenges] - Balancing high processing accuracy and productivity - The equipment for internal grinding machines must also respond to various demands - Space-saving and cost-effective equipment - Consideration for the environment - Improvement of processing accuracy and efficiency *For more details, please refer to the related links or feel free to contact us.

At Seiko Instruments, we offer a space-saving internal grinding machine with excellent machining accuracy. We have achieved a machine size that fits small workpieces without sacrificing the operability and usability for the operators using the equipment. The machining accuracy is realized by adopting a high-performance high-frequency spindle developed in-house. Additionally, the main body of the equipment is highly versatile and has excellent expandability. 【Features】 ■ Space-saving with excellent machining accuracy ■ Does not sacrifice the operability and usability for the operators using the equipment ■ Achieves a machine size that fits small workpieces ■ Adopts a high-performance high-frequency spindle developed in-house ■ Main body of the equipment: highly versatile and excellent expandability *For more details, please refer to the related links or feel free to contact us.

We would like to introduce a case where Seiko Instruments Inc. resolved challenges through test processing. For small parts, such as components for medical devices, where coaxiality between the inner and outer diameters is required, it is generally difficult to ensure precision using commonly employed tool clamping methods like air chucks, diaphragm chucks, and magnetic chucks. Our internal grinding machine addresses these challenges by adopting a roll spindle mechanism used in bearing processing and our self-developed high-frequency spindle. [Case Overview] ■ Issues - Difficulty in ensuring precision for small parts requiring coaxiality between the inner and outer diameters. ■ Results - Achieved automatic supply of parts via a parts feeder, automatic measurement of workpieces after processing, and automatic discharge. - Capable of responding to demands not only for processing precision and efficiency but also for overall productivity improvement. *For more details, please refer to the related links or feel free to contact us.

We would like to introduce a case where Seiko Instruments Inc. solved challenges through test processing. In the case of precision machined parts, a lapping process may be required in the post-process of inner surface grinding. To shorten the time required for processing, it is necessary to machine at a precision close to that of the final finishing lapping process during the inner surface grinding stage. By improving roundness, cylindricity, and surface roughness, the lapping process can be simplified. 【Case Overview】 ■Challenges - Shorten processing time - Machine at a precision close to that of lapping ■Results - Simplified lapping process - Achieved improvement in surface roughness in addition to shape accuracy *For more details, please refer to the related links or feel free to contact us.

We would like to introduce a case where Seiko Instruments Inc. resolved challenges through test processing. When performing internal grinding of micro-holes, the rigidity of the quill supporting the grinding wheel becomes lower, resulting in greater deflection of the quill, making it very difficult to ensure dimensional and shape accuracy. With our internal grinding machine, we can perform high-efficiency internal grinding of extremely small diameters down to a minimum of 0.3mm, thanks to our self-developed high-speed spindle with high precision and the processing know-how cultivated over many years of experience. [Case Overview] ■Challenges - Ensuring dimensional and shape accuracy ■Results - High-efficiency internal grinding of extremely small diameters down to a minimum of 0.3mm is possible. *For more details, please refer to the related links or feel free to contact us.

A grinding machine is a piece of equipment that processes workpieces by pressing a high-speed rotating grinding wheel against the material to be machined. It is mainly used for finishing processes and machining difficult-to-cut materials, but various types of equipment and machining methods are employed depending on the workpiece and the area to be processed. Additionally, with the miniaturization and complexity of finished products, the demands on machining equipment continue to rise. This document explains the basics of grinding machines and the types of grinding machines and grinding processes. We encourage you to read it. At Seiko Instruments, we primarily handle internal grinding machines. Seiko Instruments' internal grinding machines utilize a self-developed high-frequency spindle, achieving high precision and work efficiency, especially for small-diameter hole machining, while also being space-saving. If you are considering the introduction of an internal grinding machine, please feel free to consult with Seiko Instruments. *For more details, please refer to the PDF document or feel free to contact us.