石垣商店 Product Lineup

As a specialist in copper products, we provide various copper products essential to the power distribution and transmission equipment industry. Our products can meet a wide range of needs, from connection plates to busbars, earth bars, main bars, branch bars, and custom bending products. 1) Connection Plates: Used for connections in industrial batteries, power supply devices, and cubicles, customizable according to size, thickness, and connection method. 2) Earth Bars: Essential for power connections to distribution boards and control panels, as well as ensuring safety, capable of precise tapping and hole processing. 3) Main Bars and Branch Bars: Used as bridging bars in distribution boards, flexible in accommodating small lot production that is difficult with ready-made products. 4) Special Bending Products: Even when complex shapes or special bending processes are required, we provide high-quality and cost-effective products through our uniquely developed bender. 5) Plated Products: We have established a consistent production system up to plating in close cooperation with local partner companies. 6) Connection Rods (Bolts, Studs): Production of processed products using copper rods for transformers. 7) Connection Plates (Copper Strips): Production of processed products using copper strips for transformers. For difficult requests or projects that have been declined by other companies, please feel free to contact us.

We will introduce the quality symbols for copper and copper alloys. Metals possess various properties based on their components and compositions, but by changing the metal structure through heat treatment and processing, they can acquire even more diverse mechanical properties. For example, the alphabet at the end of a copper alloy designation, such as C1100-H, indicates the properties it possesses due to tempering. *For more details, please feel free to contact us.*

"Challenges of Pure Copper (C1100) Processing and Ishigaki Shoten's Unique Technology" "Issues in Chrome Copper Processing and Ishigaki Shoten's Solutions" "Ishigaki Shoten's Copper Processing Technology Boasting 70 Years of Experience" *For more details, please refer to the PDF document or feel free to contact us.*

This document explains the differences between chrome copper and beryllium copper. If you have any issues related to copper processing, please feel free to contact us. We also provide information on other copper products such as tough pitch copper and oxygen-free copper. [Contents] ■ Excellent properties of chrome copper: high heat resistance and strength ■ Beryllium copper: a copper alloy with multifunctionality ■ Our company has over 60 years of experience in copper processing *For more details, please refer to the PDF document or feel free to contact us.

This document explains the differences between Tough Pitch Copper (C1100) and Oxygen-Free Copper (C1020). It provides detailed information on the overview of Tough Pitch Copper (C1100), the characteristics of Oxygen-Free Copper (C1020), and a comparison between Tough Pitch Copper and Oxygen-Free Copper. Our company specializes in the processing of copper components. Please feel free to consult us when you need assistance. [Contents] ■ Overview of Tough Pitch Copper (C1100) ■ Characteristics of Oxygen-Free Copper (C1020) ■ Comparison of Tough Pitch Copper and Oxygen-Free Copper *For more details, please refer to the PDF document or feel free to contact us.

This document explains the differences between tough pitch copper (C1100) and chromium copper. It details the features of tough pitch copper (C1100), which combines high conductivity and workability, as well as the strengths of chromium copper, which boasts high heat resistance and high hardness. For inquiries or estimates regarding copper processing, please feel free to contact us. [Contents] ■ Features of Tough Pitch Copper (C1100): High conductivity and workability ■ Strengths of Chromium Copper: High heat resistance and high hardness ■ 60 years of experience: Professionals in copper processing *For more details, please refer to the PDF document or feel free to contact us.

This document explains the differences between chromium copper (C3234) and oxygen-free copper (C1020). It details the characteristics of chromium copper, which has a higher strength compared to oxygen-free copper, despite being a high-purity copper with an extremely low oxygen content. Additionally, it includes information on the applications and selection of both materials, so please take a moment to read it. [Contents] ■ Characteristics of oxygen-free copper (C1020) ■ Characteristics of chromium copper (C3234) ■ Applications and selection of both *For more details, please refer to the PDF document or feel free to contact us.

Our factory boasts industry-leading expertise and quality in the manufacturing of copper bars (busbars) for transformers, switchgear, and control panels in the power distribution industry. Our products, which are "specialized in copper," are essential for the efficient and safe supply of electricity. 【Our Strengths】 - Custom-made products tailored to customer requirements. - Use of high-quality copper materials, ensuring the reliability of electrical equipment. - Proven track record of supplying major manufacturers. - Offering suitable materials with thicknesses ranging from 3mm to 20mm. 【Message to Our Customers】 The stability and efficiency of power infrastructure support the quality of our lives and the growth of industries. We contribute to the overall development of society through reliable copper bar products. With a commitment to technological innovation and quality, we strongly support our customers in building their power supply systems.

Ishigaki Shoten Co., Ltd. is an expert in copper bar (bus bar) processing that supports our customers' challenges. We realize various copper bar processing, from the smallest parts to large power receiving equipment. ■Features■ 【Industry Expertise】 Specialized in product parts for power industry receiving equipment and storage facilities! 【Copper Material Procurement】 Strong relationships with manufacturers and wholesalers, leveraging our background as a wholesaler to procure high-purity copper! 【Custom Orders】 Capable of handling special shapes through general-purpose machining by skilled artisans! 【High Quality & Precision】 Providing high-quality products born from advanced technology through the manufacturing of industrial battery and power supply components! ■Track Record■ 【Strong Trust from Listed Companies】 Boasting numerous transaction records, our latest copper processing technology is highly regarded. ■Strengths■ 【Experience in Large Product Deliveries】 Rich experience in manufacturing large items requiring precision processing, such as large power receiving equipment. 【Cost and Speed】 Adjusting the balance of delivery time, cost, and precision according to customer needs, achieving cost optimization while preventing excessive quality. 【Integrated Production】 Comprehensive response from procurement to processing, plating, and quality control through integrated production. *For more details, please refer to the downloadable materials.

The delivery destinations for Ishigaki Shoten are transformer manufacturers and panel manufacturers. Among these, we excel at processing copper busbars ranging from 10mm to 20mm for controlling 550,000V at primary substations. We can handle material procurement, cutting, press hole drilling, press bending, machining for 12mm to 20mm, lathe processing of copper round bars, and plating (silver, tin, nickel), allowing for installation on the same day they arrive. Please note that there are processing limits for bending operations on 15mm and 20mm.

Transformers and various panels differ in size depending on the installation location and the amount of power handled. However, the strength of electricity must not weaken. To maximize performance within limited constraints, we can bend and redirect the materials, and by processing as much as possible with a single copper busbar, we can minimize the installation process. It is possible to deliver stable electricity simply by securing it with screws! Given the rising prices of copper, we only charge for the necessary material costs plus processing fees, so please consider this!

Ishigaki Shoten Co., Ltd. mainly engages in the prototyping and mass production of transformer-related components, control panel transformer-related parts, and high-speed railway-related components. We perform press processing, lathe processing, and machining to provide a variety of products in small quantities with short delivery times and high quality. We also accommodate special processes such as welding, soldering, and surface finishing. 【Business Activities】 ■ Prototyping and mass production of transformer-related components ■ Prototyping and mass production of control panel transformer-related parts ■ Prototyping and mass production of high-speed railway-related components ■ Prototyping and mass production related to the environment and new energy industries ■ Production of copper processed products for general use *For more details, please download the PDF or feel free to contact us.

This document presents a specialized guide on copper processing technology and the manufacturing and design of copper busbars. It comprehensively organizes information from the material properties of copper to processing methods, design standards for busbars, manufacturing processes, surface treatments, related standards, as well as application examples and market trends. Table of Contents 1. Overview 1.1 Importance of Copper and Copper Busbars 1.2 Key Points in Copper Processing and Busbar Manufacturing 2. Material Properties of Copper 2.1 Basic Properties of Copper 2.2 Types and Characteristics of Copper Alloys 2.3 Recyclability of Copper and Reduction of Environmental Impact 3. Copper Processing Technology 3.1 Overview of Processing Methods 3.2 Plastic Processing (Rolling, Drawing, Forging, Bending) 3.3 Cutting Processing (Turning, Milling, Drilling, etc.) 3.4 Casting (Sand Casting, Die Casting) 3.5 Powder Metallurgy 3.6 Latest Processing Technologies (Micro Machining, Laser Processing, 3D Printing, etc.) 3.7 Precautions and Countermeasures during Processing 4. Manufacturing and Design of Copper Busbars 4.1 Required Performance of Busbars 4.2 Design Process and Design Standards 4.3 Insulation Treatment and Plating Treatment Continued with other items.

## Table of Contents 1. **General Overview: Basic Knowledge of Copper and Copper Alloys** 1.1 History and Characteristics of Copper 1.2 Types and Applications of Copper Alloys 1.3 Physical, Mechanical, Electrical, and Thermal Properties of Copper 1.4 Oxidation and Corrosion Characteristics of Copper 2. **Introduction to Copper Joining Technologies** 2.1 Differences Between Welding, Brazing, and Mechanical Joining 2.2 Unique Joining Challenges of Copper (High Thermal Conductivity, Susceptibility to Oxidation, Cracking, etc.) 2.3 Key Points for Selecting Joining Technologies 3. **Comprehensive Explanation of Copper Welding** 3.1 Overview and History of Copper Welding 3.2 Methods and Types of Copper Welding (TIG, MIG, Resistance Spot, Laser, Electron Beam, etc.) 3.3 Common Defects During Welding and Countermeasures (Blowholes, Cracking, Oxidation, etc.) And so on, continuing up to eight chapters.