日進精機 List of Products and Services

This is a hydraulic spool valve for AT. After machining on a moving spindle NC automatic lathe, anodizing is performed by a partner company, followed by finishing through through-feed grinding and stop grinding depending on the shape. With over 70 years of accumulated technology, we provide high-precision, high-quality spool valves at a low cost.

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We would like to introduce the "AT Piston" handled by Nisshin Seiki Co., Ltd. The component parts can be procured from partner factories. Aluminum DC is machined, followed by the assembly of shafts, springs, washers, etc. 【Specifications】 ■ Material: ADC12, Iron ■ Processing: Turning, Assembly *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "Sheet Lock Striker" handled by Nisshin Seiki Co., Ltd. By heating and crushing (crimping) a round bar bent in a U-shape with electricity, we sandwich the plate from both sides and perform a post-crimping tempering. Please contact us when you need our services. 【Specifications】 ■ Material: Steel ■ Processing: Thermal crimping *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "Hydraulic Booster Piston" handled by Nisshin Seiki Co., Ltd. It is machined from round bars using a composite NC lathe, followed by broaching and outer diameter semi-finishing. After anodizing by a partner company, it undergoes outer diameter super-finishing and inner diameter honing. Please feel free to contact us when you need our services. 【Specifications】 ■Product: Brake Piston ■Material: A5056 *For more details, please refer to the PDF document or feel free to contact us.

• brake
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We would like to introduce the "Spool Holder" handled by Nisshin Seiki Co., Ltd. It is machined from solid material using a composite NC lathe and broaching. Due to the need for strength, it is fully machined from round bars and undergoes anodizing (color treatment for identification) at a partner company. 【Specifications】 ■Material: A5056 ■Processing: Turning, Broaching *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce the "Brake Piston" handled by Nisshin Seiki Co., Ltd. It is machined from bar stock using an NC automatic lathe and finished by grinding. Inner diameter processing and small hole machining are also possible. Anodizing (coloring for identification from similar products) is performed by a partner company. 【Specifications】 ■ Material: A5056 (Aluminum) ■ Processing: Turning, drilling, grinding *For more details, please refer to the PDF document or feel free to contact us.

• brake
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We would like to introduce the "AT Accumulator Piston" handled by Nisshin Seiki Co., Ltd. DC raw materials can be procured from partner companies. Products with strict precision are machined using wet processing, while others are machined dry using NC lathes, with some grinding and assembly of components like springs. 【Specifications】 ■ Material: ADC12 ■ Processing: Turning, Assembly *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "P Valve Piston" handled by Nisshin Seiki Co., Ltd. It is machined from round bars using multi-axis automatic lathes or NC automatic lathes, and is subjected to anodizing treatment (coloring treatment for identification from similar products) at our partner company. Please feel free to contact us when you need assistance. 【Specifications】 ■ Material: A5056 ■ Processing: Turning, Drilling *For more details, please refer to the PDF document or feel free to contact us.

• valve
• Processing Contract

We would like to introduce the "Brake Sleeve" handled by Nippon Seiki Co., Ltd. It is machined from round bars using a multi-axis automatic lathe, and anodizing treatment (coloring treatment for identification from similar products) is performed by our partner company. Please feel free to contact us when you need it. 【Specifications】 ■ Material: A5056 ■ Processing: Turning, Milling *For more details, please refer to the PDF document or feel free to contact us.

• brake
• Processing Contract

We would like to introduce the "Control Valve Piston" handled by Nisshin Seiki Co., Ltd. It is machined from A5056 using an NC automatic lathe, and after cutting and anodizing, a metal component is assembled at the tip using a power check press. Please feel free to contact us when you need assistance. 【Specifications】 ■ Material: A5056 ■ Processing: Turning, Assembly *For more details, please refer to the PDF document or feel free to contact us.

• valve
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We would like to introduce the "Switch Case" handled by Nisshin Seiki Co., Ltd. We perform cutting and threading processing of pressed products using lathes, and plating is done by our partner company. Please feel free to contact us when you need assistance. 【Specifications】 ■ Steel (pressed material) ■ Milling, turning *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce the "Brake Pistons" handled by Nisshin Seiki Co., Ltd. We are cutting and grinding rough materials that have been cold forged by our partner companies. Please feel free to contact us when you need assistance. 【Specifications】 ■ Material: S15C ■ Processing: Turning, Grinding *For more details, please refer to the PDF document or feel free to contact us.

• brake
• Processing Contract

We would like to introduce the "Brake Master Cylinder Piston" handled by Nisshin Seiki Co., Ltd. It is machined from S45C material using NC automatic lathes, with heat treatment and blackening processed by our partner company. Please feel free to contact us when you need it. 【Specifications】 ■ Material: S45C type ■ Processing: Turning, drilling, grinding *For more details, please refer to the PDF document or feel free to contact us.

• brake
• Processing Contract

A "blank" is a component that automatically controls the vehicle to maintain its direction of travel. The bar material is cut by a partner company and machined using a parallel two-axis NC lathe. Please feel free to contact us when you need assistance. 【Specifications】 ■ Material: SUJ2 type ■ Processing: Lathe *For more details, please refer to the PDF document or feel free to contact us.

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• Other Auto Parts

We would like to introduce the "Brake Piston" handled by Nisshin Seiki Co., Ltd. Secondary processing such as cutting and grooving using NC lathes. High-frequency hardening, outer diameter grinding, blackening, and rust prevention are performed by our partner companies. Please feel free to contact us when you need assistance. 【Specifications】 ■ Material: S45C series ■ Applications: Turning, milling, grinding *For more details, please refer to the PDF document or feel free to contact us.

• brake
• Processing Contract

The "linear sleeve" is a control sleeve for electromagnetic valves used in automatic transmissions (AT). It is processed for inner and outer diameters, inner diameter grooves, and threads on a machining machine with all NC processes connected, with dimensional tolerances managed at 4μ. Anodizing treatment is performed by a partner company, and DC raw materials can be procured from the partner company. 【Specifications】 ■ Material: ADC12 ■ Processing: Turning *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "Door Lock Striker" handled by Nisshin Seiki Co., Ltd. By heating and crushing a bent round bar with electricity (to rivet it), we sandwich the plate from both sides and perform a post-rivet heat treatment. We have a production capacity of 3 million units per month. Please contact us when you need our services. 【Specifications】 ■ Material: Steel ■ Processing: Hot Riveting *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the "Hydraulic Valve for AT" handled by Nisshin Seiki Co., Ltd. Depending on the shape, you can choose between through grinding and stop grinding. After cutting with a CNC lathe, anodizing is performed by a partner company, followed by finishing with grinding. 【Specifications】 ■Material: A6061 ■Processing: Turning, Grinding *For more details, please refer to the PDF document or feel free to contact us.

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• Drive system parts

The method of softening iron with heat from electric current and crushing it with pressure is known as thermal riveting technology. Nisshin Seiki Co., Ltd. has achieved mass production by processing on an automated line. This has made it possible to secure products more cheaply and quickly than with arc welding. A main product is the striker that locks car doors and seats. For more details, please contact us or refer to our catalog.

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Nisshin Seiki Co., Ltd.'s "Aluminum Cutting Processing" accommodates various materials from aluminum bar stock to aluminum die casting. By utilizing single-purpose machines and NC lathes, we achieve cost-effective and high-performance processing. Additionally, by using tools developed exclusively by Nisshin Seiki, we can consistently maintain high precision in inner diameters. Typical processing examples include AT sleeves, plugs, AT pistons, and AT valves. For more details, please contact us or refer to our catalog.

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Nisshin Seiki Co., Ltd.'s "Aluminum Cutting Processing" accommodates various materials from aluminum bar stock to aluminum die casting. By utilizing single-purpose machines and NC lathes, we achieve cost-effective and high-performance processing. Additionally, by using tools developed uniquely by Nisshin Seiki, we can consistently maintain high precision in inner diameters. Typical processing examples include brake valve pistons, brake sleeves, and P valve pistons. The brake valve piston is a component that appropriately distributes hydraulic pressure to the front and rear wheels. It is processed from aluminum bar stock, with a steel pin driven into the tip. For more details, please contact us or refer to our catalog.

• Processing Contract

Nisshin Seiki Co., Ltd.'s "Aluminum Cutting Processing" accommodates various materials from aluminum bar stock to aluminum die casting. By using single-purpose machines and NC lathes, we achieve cost-effective and high-performance processing. Additionally, by utilizing tools developed uniquely by Nisshin Seiki, we can consistently maintain high precision in inner diameters. Typical processing examples include spool valves, brake pistons, and sleeves for automatic transmissions. The brake master cylinder piston (aluminum) is a crucial component that converts the force applied to the brake pedal into hydraulic pressure. Due to its soft aluminum material, we take great care to avoid scratches during processing. For more details, please contact us or refer to our catalog.

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At Nippon Seiki Co., Ltd., our "Iron Cutting Processing" focuses on high-precision machining of safety components that are critical to human life, such as brake master cylinder pistons and spool pulp. By utilizing versatile NC lathes during processing, we can accommodate various shapes. Our long-standing track record since our founding has enabled us to achieve high precision in dimensions and surface roughness. Typical examples of our machining include brake pistons and switch cases. The brake master cylinder piston (made of iron) is an essential component that converts pedal force into hydraulic pressure. We process these using advanced NC lathes and tapping centers. For more details, please contact us or refer to our catalog.

• Processing Contract