Gyokucho

Gyokucho

Gyokucho (pronounced guy-kooh-cho) invented the first replaceable blade Japanese saw back in the 1970's, and by many accounts still lead the industry in terms of quality and innovation.

The blades of their saws receive a special surface treatment called electroless nickel plating. The plating produces a very smooth surface that resists corrosion and the adhesion of tree resins as well as providing a reflective surface that can be used to accurately align the cut. 

The teeth of Gyokucho saws are hardened by a highly developed version of impulse hardening - only the very tip of the tooth is exposed to exactly 27.12MHz for between 3 and 5 milliseconds, the resulting shockwave case hardens the outside of the tip of the tooth to well over RC67 (harder than a file) while leaving the interior soft for maximum strength. This extremely precise differential hardening process is the secret behind Gyokucho's reputation for unparalleled quality.

With careful daily use in a professional workshop, we would typically expect a Gyokucho saw blade to last between 5 and 7 years. 

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