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What is JIS? Common rules for manufacturing.

A clear explanation from the basics of JIS to how to read tolerances and the relationship between tolerances and costs!

Common rules for product dimensions, quality, and testing methods: "JIS." We will clearly explain why they are necessary, representative examples such as dimensional tolerances and geometric tolerances, how to read "H11" and "H7" on drawings, and why processing costs change with tolerance specifications, all in four pages. Ishigaki Shoten has extensive processing experience with copper busbar products for transformer manufacturers and panel manufacturers in the Tokai region, with thicknesses ranging from 3mm to 20mm, processing a total of 150 tons of copper annually as a specialized copper processing company. We have a consistent production system from order to processing, plating, and delivery/shipping, allowing us to respond quickly with drawings and order forms! Hand-drawn drawings are acceptable! Truly starting from one piece is fine! Urgent orders are welcome! Please feel free to consult with us!

copper busbar.com

basic information

For details about the products, please feel free to contact us at 【copperbusbar.com】!

Price range

Delivery Time

Model number/Brand name

ishigaki-Cu-busbar

Applications/Examples of results

Applications Incorporation achievements - Oil-filled transformers - Molded transformers - Cubicles - Distribution boards and control panels - Electrical components for machine tools such as spot welding machines and plating equipment

Strip conductors and busbars - How to interpret standard terminology

TECHNICAL

What is the difference between IEC 61439 and JIS? Basics of panel verification methods.

TECHNICAL

The story of the change in bus duct standards - How to read the JIS C 8364 2025 revision.

TECHNICAL

Reading of the copper material symbol - Alloy number, shape symbol, and quality breakdown guide.

TECHNICAL

End chamfering of copper busbars - Standard values defined by JIS H 3140 [Explanatory Document]

TECHNICAL

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Distributors

We have been providing copper components to transformer and control panel manufacturers, delivering energy through copper and ensuring safety and security for society. As a result of walking alongside our customers throughout this process, we have become a "copper specialty processing company"! When our customers are truly in need, we respond as quickly as the same day, embodying the spirit of mutual support! ■ Overwhelming inventory ■ Craftsmanship that allows for the fastest processing and youthful, energetic power ■ Strong network with local plating partner companies We can perform various processing methods such as machining, pressing, welding, and brazing. Since we have established a production system for a wide variety of small quantities, ■ Small lots ■ Various sizes ■ Complex shapes can also be handled quickly. We aim to be a company that delivers energy to everyone through copper, and we look forward to your continued support.