Seiko Instruments Inc. will be exhibiting at "Grinding Technology Japan 2025," held at Makuhari Messe in Chiba Prefecture. This exhibition will not only present advanced information on grinding processing technology and tool manufacturing technology but will also provide information on skills and know-how. We will also be hosting the "Grinding Concierge," among other opportunities for discussion in various settings. We look forward to your visit.

**Campaign Overview** We are offering a limited-time special price on SII's internal grinding machine STG series. ◆ Eligible Models - General-purpose internal grinding machine STG-3NX (4-inch scroll chuck specification) - 2 units - General-purpose internal grinding machine STG-6N (6-inch scroll chuck specification) - 1 unit ◆ Conditions - The eligible models will be SII standard specifications. - Orders must be placed by the end of March 2025. * Please consult separately regarding delivery times. * This offer will end once the above quantity is reached. Thank you for your understanding. <Contact Information> Seiko Instruments Inc. Precision Devices Division, Sales Department, Sales Section 3 TEL: 047-392-2091 FAX: 047-392-2476 Email: naiken@sii.co.jp

Seiko Instruments Inc. will exhibit the CNC internal grinding machine STG-6N and high-frequency spindle at the "Tack Private Show." Highlights of the exhibition: The "STG Series" is a versatile internal grinding machine equipped with a unique high-speed, high-precision, and high-rigidity spindle on the grinding wheel shaft, achieving improved processing accuracy and productivity for internal diameter finishing. Features of the STG-6N: A compact general-purpose internal grinding machine that enables precision and high-efficiency processing for a wide variety of products with an outer diameter of up to φ160mm. - Compatible with a wide range of workpieces up to an outer diameter of φ160mm. - Compatible with FANUC's FIELD system. - Suitable for gears, mold components, ring gauges, chuck collets, hydraulic parts, automotive parts, etc. Exhibition Overview: "Tack Private Show" Date: April 20 (Thursday) to April 22 (Saturday), 9:30 AM to 7:00 PM (on April 22, Saturday, from 9:00 AM to 3:00 PM) Venue: Tack Corporation Headquarters Address: 1816-3 Shijino Otsu, Tōmi City, Nagano Prefecture

Seiko Instruments Inc. will exhibit the CNC internal grinding machine STG-6N at the "2023 Chubu Machine Processing System Exhibition." Highlights of the exhibition: The "STG Series" is a versatile internal grinding machine equipped with a unique high-speed, high-precision, and high-rigidity spindle on the grinding wheel axis, achieving improved processing accuracy and productivity for internal diameter finishing. Features of the STG-6N: A compact general-purpose internal grinding machine that enables precise and high-efficiency processing for a wide variety of products with an outer diameter of up to φ160mm. - Compatible with a wide range of workpieces with an outer diameter of up to φ160mm - Compatible with FANUC's FIELD system - Suitable for gears, mold parts, ring gauges, chuck collets, hydraulic components, automotive parts, etc. Exhibition Overview: "2023 Chubu Machine Processing System Exhibition" Dates: March 16, 2023 (Thursday) 10:00 AM - 5:00 PM, March 17, 2023 (Friday) 9:30 AM - 4:00 PM Venue: Port Messe Nagoya, Hall 3

Seiko Instruments Inc. will showcase the CNC internal grinding machine STG series at "Grinding Technology Japan 2023." Highlights of the exhibition The "STG series" is a CNC universal internal grinding machine equipped with a unique high-speed, high-precision, and high-rigidity spindle on the grinding wheel axis, achieving improved machining accuracy and productivity for internal diameter finishing. 【STG-3NX】Features A compact universal internal grinding machine that significantly enhances the accuracy and productivity of small diameter hole finishing. ◆ Capable of grinding minimum inner diameters of φ0.3mm ◆ Suitable for chuck collets, mold components, ring gauges, carbide parts, ceramic parts, magnets, etc. 【STG-6N】Features A compact universal internal grinding machine that achieves precision and high-efficiency processing for a wide variety of products with outer diameters up to φ160mm. ◆ Suitable for gears, mold components, ring gauges, chuck collets, hydraulic parts, automotive parts, etc. Exhibition Overview "Grinding Technology Japan 2023" Dates: March 8 (Wed) to March 10 (Fri), 2023, 10:00 AM to 5:00 PM Venue: Makuhari Messe, Exhibition Hall 8, Booth No: 073

Seiko Instruments Inc. will exhibit the CNC internal grinding machine STG-6N at the "2023 Osaka Machine Processing System Exhibition." Highlights of the exhibition: The "STG Series" is a versatile internal grinding machine equipped with a unique high-speed, high-precision, and high-rigidity spindle on the grinding wheel shaft, achieving improved processing accuracy and productivity for inner diameter finishing. Features of the STG-6N: A compact general-purpose internal grinding machine that enables precision and high-efficiency processing for a wide variety of products with an outer diameter of up to φ160mm. - Compatible with a wide variety of workpieces with an outer diameter of up to φ160mm. - Compatible with FANUC's FIELD system. - Suitable for gears, mold components, ring gauges, chuck collets, hydraulic parts, automotive parts, etc. Exhibition Overview: "2023 Osaka Machine Processing System Exhibition" Dates: February 16, 2023 (Thursday) 10:00 AM - 5:00 PM, September 17, 2023 (Friday) 9:30 AM - 4:00 PM Venue: Intex Osaka, Hall 5 A & B

Seiko Instruments Inc. will exhibit the STG series CNC internal grinding machines and high-frequency spindles at "MECT 2023." Highlights of the exhibition: The "STG series" is a versatile internal grinding machine equipped with a unique high-speed, high-precision, and high-rigidity spindle on the grinding wheel shaft, achieving improved processing accuracy and productivity for inner diameter finishing. Features of the [STG-3NX]: A compact, versatile internal grinding machine that greatly enhances the accuracy and productivity of small diameter hole finishing. - Capable of grinding minimum inner diameters of φ0.3mm - Suitable for chuck collets, mold parts, ring gauges, carbide parts, ceramic parts, magnets, etc. Features of the [STG-6N]: A compact, versatile internal grinding machine that achieves precision and high-efficiency processing for a wide variety of products with outer diameters up to φ160mm. - Suitable for gears, mold parts, ring gauges, chuck collets, hydraulic parts, automotive parts, etc. Exhibition Overview: "MECT 2023" Dates: October 18 (Wed) to 21 (Sat), 10:00 AM to 5:00 PM *On the 21st (Sat), until 4:00 PM Venue: Port Messe Nagoya, New No. 1 Exhibition Hall Booth: 1A23 We sincerely look forward to your visit.

Seiko Instruments Inc. will exhibit the CNC internal grinding machine STG-6N and high-frequency spindle at the "Tohoku Grand Fair 2023." Highlights of the exhibition: The "STG series" is a versatile internal grinding machine equipped with a unique high-speed, high-precision, and high-rigidity spindle on the grinding wheel shaft, achieving improved machining accuracy and productivity for internal diameter finishing. Features of the STG-6N: A compact general-purpose internal grinding machine that enables precise and efficient machining for a wide variety of products with an outer diameter of up to φ160mm. - Compatible with a wide range of workpieces with an outer diameter of up to φ160mm. - Compatible with FANUC's FIELD system. - Suitable for gears, mold components, ring gauges, chuck collets, hydraulic parts, automotive parts, etc. Exhibition Overview: "Tohoku Grand Fair 2023" Dates: July 21 (Friday) to July 22 (Saturday) from 10:00 to 17:00 *On July 22 (Saturday), from 9:00 to 16:00 Venue: Yume Messe Miyagi (Miyagi Industrial Exchange Center) Address: 3-1-7 Minato, Miyagino-ku, Sendai City, Miyagi Prefecture, 983-0001

▼Exhibition Overview Our company was established in 1937 as the watch manufacturing division of the Seiko Group. Since then, we have played a central role in watch manufacturing for many years and have developed a wide range of businesses utilizing the derived technologies from watch manufacturing, including electronic components, precision parts, and printing devices. At our booth at the Mechanical Element Technology Exhibition, we will introduce various products based on the small and precise manufacturing cultivated through watch production. We warmly invite you to visit our booth during your visit. ▼Exhibited Products 1. Rare earth magnets with excellent heat resistance and corrosion resistance 2. High-performance metal products SPIRON that do not rust, are strong, do not deform, and do not magnetize 3. New metal material TNS alloy with excellent biocompatibility 4. High-precision, high-quality miniature ball bearings 5. High-precision and high-quality precision machined parts cultivated in the automotive industry 6. High-frequency spindle, the heart of ultra-precision grinding machines We sincerely look forward to your visit.

We would like to introduce our processing case that has achieved high-precision machining of thin-walled workpieces. Workpieces that require internal grinding often demand not only roundness and surface roughness but also runout (concentricity) relative to the outer diameter. This is particularly challenging for thin-walled workpieces, where deformation due to gripping becomes an issue. To address this, we have developed a new 2-roll 1-shoe spindle, which has been installed in our CNC internal grinding machine STG-6N, enabling high-precision machining of thin-walled workpieces.