クロダ精機 List of Products and Services

Kuroda Seiki specializes in prototype processing of precision press parts, capable of handling products from 1mm ultra-small parts to 300mm. We have a strong advantage in processing thin materials such as terminals, springs, and busbars, achieving short delivery times. With high-precision processing by skilled craftsmen, we also cater to fine parts in the aerospace, space, and medical fields. We can propose design improvements and cost reductions aimed at mass production through prototypes that meet diverse needs. 【Features】 ■ Ultra-small prototype service available from one piece ■ Capable of processing ultra-small and fine parts from 1mm to 300mm ■ Short delivery system unique to prototype specialization ■ Numerous achievements in high-precision processing of thin and complex shapes ■ Extensive experience in processing parts for aerospace, space, and medical applications *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• Prototype Services

At Kuroda Seiki, we respond to the voices from the field with our wire-cut electrical discharge machining technology specialized in fine part processing and an in-house system capable of short delivery times and flexible responses. Our specialty lies in prototype parts that require small size and high precision, such as lens holders and positioning parts. From technical consultations at the drawing stage to single prototype production, we realize designers' ideas in the shortest time possible with a balance of speed and precision in manufacturing. 【Usage Scenarios】 - Production of prototypes requiring high-precision processing - Manufacturing of parts that require complex shapes or fine processing - Parts that require positional accuracy, such as lens fixing components - Cases where processing is needed within a short delivery time 【Benefits of Implementation】 - High-precision processing can stabilize product quality. - Achieving processing within a short delivery time can accelerate development speed.

• Processing Contract
• Prototype Services

In the manufacturing of electronic devices, parts that require complex shapes or fine processing can be difficult to achieve with conventional machining methods. Therefore, wire electrical discharge machining (wire cutting) is gaining attention. Since it cuts by melting the metal, there is no generation of burrs. The cross-section is also smoother and more vertical compared to laser or press machining. At Kuroda Seiki, we provide high-precision and high-quality wire cutting services supported by our extensive facilities and advanced technical capabilities, strongly assisting our customers in product development. 【Application Scenarios】 - Semiconductor manufacturing equipment parts: Ideal for processing semiconductor manufacturing equipment parts that require fine machining. - Medical device parts: Ideal for processing medical device parts that require precise or complex shapes. 【Benefits of Implementation】 - Improved product quality: High-precision machining contributes to enhancing product quality. - Accelerated product development: By achieving short lead times for machining, we contribute to speeding up product development. - Cost reduction: Compared to conventional machining methods, machining time can be shortened, contributing to cost reduction.

• Processing Contract
• Prototype Services

In the development of medical devices, complex shapes and high-precision parts processing pose significant challenges. At Kuroda Seiki Co., Ltd., we provide high-quality parts tailored to our customers' needs using precision processing technologies, including wire processing. We specialize in thin and small items, making us well-suited to meet the demands of the medical field. We can also accommodate short delivery times, so you can confidently place your orders with us. 【Application Scenarios】 - Precision parts processing for medical devices - Parts requiring complex shapes and fine processing - Parts that demand high precision and quality - Parts needing prototypes within a short delivery time - Prototyping stage in medical device development - Creation of prototypes based on design drawings - Development of prototypes for performance evaluation - Creation of multiple types of prototypes 【Benefits of Implementation】 - High-precision parts processing can contribute to the performance improvement of medical devices. - Short delivery times can lead to a reduction in development periods. - Our extensive equipment and technical capabilities allow us to meet diverse needs.

• Processing Contract
• Prototype Services

Kuroda Seiki is a specialized company for prototype precision sheet metal and press parts. We can provide prototype parts ranging from ultra-fine 1mm to 300mm with high precision and short delivery times. We have a wide range of delivery records in various fields, from terminals to aerospace components. You can also rely on us for prototype parts for recent trends such as EV vehicles and rapid chargers. Based on our prototyping know-how, we also offer cost reduction proposals. Please feel free to contact us when you need our services. 【Prototype Examples】 Terminals, connectors, bus bars, spring parts, cases, brackets, motor cores, and precision parts for automotive, optical medical, electrical, OA equipment, and aerospace applications. *For more details, please refer to the PDF materials or feel free to contact us.

• Other machine elements

At Kuroda Seiki, we handle various processes including "wire processing (wire electrical discharge machining)," as well as "laser processing," "press processing," and "bending processing." We also possess a wealth of equipment, including the high-speed, high-performance wire electrical discharge machining machine "ALN600G," the deburring machine "Mini AuDeBu," and the load management air "QC Press." Please feel free to contact us when you need our services. 【Equipment List (Excerpt)】 ■ Wire cut electrical discharge machining machine ■ Laser processing machine ■ Crank press ■ Machining center ■ Projector ■ CAD *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract
• Prototype Services

This document is a collection of case studies showcasing the achievements of our company, which specializes in prototype precision press parts, in the field of ultra-precision micro prototypes. It includes examples of prototypes such as "shells" for automotive manufacturers, as well as "lids" and "terminals" for industrial machinery manufacturers. Based on our prototyping know-how, we also offer proposals for cost reduction. Please feel free to contact us when you need assistance. [Featured Cases] ■ For automotive manufacturers: Shell ■ For the electronic components industry: Socket cover ■ For industrial machinery manufacturers: Lid ■ For industrial machinery manufacturers: Terminal ■ For companies considering motor implementation: Motor core *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• Prototype Services

We would like to introduce a case of prototype processing for "socket covers (electronic components)" aimed at the electronic components industry. After shaping the outer form with wire, each piece is manually bent one step at a time. Products with such shapes often have strict precision requirements, but this is where our company excels. *Dedicated mold production 【Overview】 ■ Delivery time: 2 weeks ■ Quantity: 80 pieces ■ Work size: Height 3mm × Length 6mm × Width 8mm ■ Dimensional accuracy: ±0.02 ■ Processing material: C5210 t=0.25 *For more details, please refer to the PDF document or feel free to contact us.

• Prototype Services

We would like to introduce a case of prototype processing of "motor cores (small motor components)" for companies considering the introduction of motors. We can accommodate various needs, including "no mold," "simple mold stacking," "press processing considering mass production," and "prototype processing with stacking," depending on the application. We can also handle a wide range of materials and quantities, so please feel free to contact us. 【Overview】 ■ Delivery time: 3 weeks ■ Quantity: 30 pieces ■ Work size: Height 30mm × Length 25mm × Width 25mm ■ Dimensional accuracy: ±0.01 ■ Processing material: Electrical steel sheet T0.35 *For more details, please refer to the PDF document or feel free to contact us.

• Prototype Services

We would like to introduce a case of prototype processing of "shells (in-vehicle components)" for automobile manufacturers. After shaping the material with plating using wire, bending processing was performed with a bender. Although it is bent into a square shape, it can be manufactured with a precision of ±0.02. 【Overview】 ■Delivery time: 2 weeks ■Quantity: 200 pieces ■Work size: Height 15mm × Length 20mm × Width 30mm ■Dimensional accuracy: ±0.02 ■Processing material: C2600 t=0.4 *For more details, please refer to the PDF document or feel free to contact us.

• Prototype Services

We would like to introduce a case of prototype processing of "lids (machine parts)" for industrial machinery manufacturers. The key point is the small diameter curl bending. This product has an inner diameter of Φ0.5, with a precision of ±0.01. The attached shaft is crimped after curl bending. *Dedicated mold production 【Overview】 ■ Delivery time: 3 weeks ■ Quantity: 100 pieces ■ Work size: Height 5mm × Length 15mm × Width 15mm ■ Dimensional accuracy: ±0.01 ■ Processing material: SUS301 t=0.2 *For more details, please refer to the PDF document or feel free to contact us.

• Prototype Services

We would like to introduce a case of prototype processing of "terminals (industrial machine parts)" for industrial machinery manufacturers. The ladder part has a tapered shape, but there is no overall distortion. The area where the two pieces are joined has a gap of 0. *Custom mold made. 【Overview】 ■ Delivery time: 2 weeks ■ Quantity: 52 pieces ■ Work size: Height 10mm × Length 20mm × Width 10mm ■ Dimensional accuracy: ±0.02 ■ Processing material: C5210 t=0.2 *For more details, please refer to the PDF document or feel free to contact us.

• Prototype Services

"Fine Hole Discharge Machining" creates holes by melting metal through the action of discharge (a discharge phenomenon similar to lightning that generates heat) occurring between the machining electrode and the material. At Kuroda Seiki, we use electrodes ranging from Φ0.3 to 3mm, but the finished dimensions and conditions vary depending on the machining material and thickness. [Features of our Fine Hole Discharge Machining] ■ Uses electrodes from Φ0.3 to 3mm ■ Finished dimensions and conditions vary depending on the machining material and thickness *For more details, please refer to the PDF document or feel free to contact us.

• Electric discharge machine

"Etching processing" primarily involves the chemical or electrochemical dissolution and removal of the surface or shape of metals, allowing for the processing of the metal surface into any desired shape. At Kuroda Seiki, the standard dimensional tolerance is generally ±10-15% of the plate thickness, but we can accommodate strict requirements for small lots. [Features of our etching processing] ■ Processing plate thickness: t: 0.005–2.0 (other thicknesses available upon consultation) ■ Corner shape: R with 40% of plate thickness for outer corners, and R with 80% of plate thickness for inner corners ■ We respond to strict requirements for small lots ■ For double-sided etching, within 10% of plate thickness; for single-sided etching, within 20% of plate thickness *For more details, please refer to the PDF document or feel free to contact us.

• Etching Equipment

"Bending processing" involves placing a workpiece, which is a sheet material, on a V-shaped die and pressing it from above with a punch to bend it at a desired angle. This is a fundamental process in sheet metal processing. At Kuroda Seiki, we perform this process accurately by hand for each individual part using a small press brake called a bender, designed for precision small parts. Since we own many general-purpose models, we can reduce time and costs, and our machines are compact and capable of producing high dimensional accuracy. Additionally, we use dedicated jigs tailored to the products, allowing us to accommodate any shape. We can also process thin sheets (starting from 0.01mm). **Features of our bending processing:** - Each part is accurately processed by hand using a bender. - We can reduce time and costs due to our extensive inventory of general-purpose models. - Our machines are compact and capable of producing high dimensional accuracy. - We can accommodate any shape using dedicated jigs tailored to the products. - We can process thin sheets (starting from 0.01mm). *For more details, please refer to the PDF document or feel free to contact us.*

• Processing Contract

"Press processing" is a method that uses molds to apply pressure with a press machine to cut or bend materials, commonly used in mass production. At Kuroda Seiki, we adopt a sequential processing method primarily using single molds rather than molds designed for mass production. Since we create them simply, the mold production time is short and inexpensive, enabling quick delivery and low costs. 【Features of Our Press Processing】 - We adopt a sequential processing method primarily using single molds rather than molds for mass production. - The simple creation process results in short and inexpensive mold production time, allowing for quick delivery and low costs. *For more details, please refer to the PDF document or feel free to contact us.

• Press Dies

"Machining processing" refers to the automated processing of materials by drilling or cutting them using various rotating tools that are changed out according to a program. At Kuroda Seiki, we specialize in processing aluminum materials. Please feel free to consult us even for intricate shapes or items with strict dimensional tolerances. We also focus on the quality of the finished surface. [Features of our machining processing] ■ Specializing in processing aluminum materials ■ Able to accommodate inquiries for intricate shapes and strict dimensional tolerances ■ Emphasizing the quality of the finished surface *For more details, please refer to the PDF document or feel free to contact us.

• Machining Center

"Laser processing" refers to a processing method that utilizes the high-density energy obtained by focusing a laser beam to a single point for cutting and drilling materials such as metals. Generally, CO2 (carbon dioxide) lasers are widely used. It can be considered a type of thermal processing similar to gas cutting; however, the absorption rate of the laser light by the material is crucial. Therefore, cutting materials that easily reflect laser light, such as gold and silver, is particularly challenging. At Kuroda Seiki, we have introduced fine laser processing machines, allowing for high-precision processing (approximately ±0.02mm) of thin sheets around 0.1mm and intricate shapes. [Features of our laser processing] - Introduction of fine laser processing machines - High-precision processing (approximately ±0.02mm) of thin sheets around 0.1mm and intricate shapes *For more details, please refer to the PDF materials or feel free to contact us.

• Processing Contract

Product Introduction "Wire Processing" is a technology that uses metal wires ranging from Φ0.02mm to Φ0.35mm to cut and process metal materials with high precision. Typically, Φ0.2mm to Φ0.3mm brass wire is used. The processing utilizes electric discharge like lightning to cut while melting the metal with its heat, known as "non-contact and melting processing." This method results in minimal wear and achieves high precision finishes. At Kuroda Seiki, we use Φ0.2mm brass wire on all six wire processing machines (also capable of Φ0.1mm). We have introduced three wire CAMs and the latest high-speed processing machines, achieving a balance of "short delivery times and high precision." Features of Our Wire Processing - All models use Φ0.2mm brass wire (Φ0.1mm is also available) - Equipped with three wire CAMs and six processing machines - Introduction of the latest high-speed processing machines to improve productivity - Flexible response to short delivery time requests *For more details, please refer to the PDF document or feel free to contact us.*

• Processing Contract

Kuroda Seiki Co., Ltd. specializes in the production of precision press parts with the catchphrase "Your Prototype Factory." With a rich inventory of materials and the concept of a "convenience store factory" operating 350 days a year, we achieve short delivery times through reliable technology provided by many skilled craftsmen. We have confidence in our know-how for quickly producing inexpensive prototypes. Based on our prototyping expertise, we also offer cost reduction proposals. 【Features】 ■ Precision fine sheet metal and precision press, rapid prototyping ■ Accepting drawings via fax or data (3D in IGES format) ■ Quick estimates (within 4 hours), detailed discussions, and adherence to promised delivery dates ■ Reliable processing technology due to our specialization ■ Next-day delivery possible via courier from Nagano Prefecture, the center of Japan For more details, please contact us or download our catalog.

• Processing Contract