SK Introduces New-Feature Chip Saw Sharpener 'SK-640E' Ahead of Mowing Season — Expanding Sales via Exhibitions and Web Sales

SK Corporation (Headquarters: Sōja City, Okayama Prefecture; President: Yasunori Sasazuma), which designs and sells chip saw sharpeners for brush cutters, announces the launch of its successor model 'SK-640E' in June 2026. This new model, featuring enhanced functions while retaining the beloved design of its long-selling predecessor used for over 30 years, will be introduced through exhibitions and direct web sales.

Targeting agricultural, landscaping, and forestry sites struggling with rising material costs and labor shortages, SK promotes a sustainable work environment by encouraging users to 'sharpen and reuse' blades instead of discarding them. Alongside participation in summer agricultural machinery exhibitions where users can experience the machine firsthand, the company will begin direct online sales via its official website, expanding its reach nationwide.

[Development Background: The Shift Toward 'Resharpening' in Response to Rising Material Costs]

Soaring material and fuel prices have made cost increases a serious challenge for primary industries. Since its founding, SK has advocated for 'tool reuse' by resharpening chip saws—reducing blade costs while also improving fuel efficiency, work productivity, and safety. For the new SK-640E, the company has added new features while keeping the price unchanged, aiming to support customers facing tough business conditions.

[Four Key Upgrades and Features of the New 'SK-640E']

The SK-640E inherits the ease of use and durability of the previous model while adding new functionalities. It retains the simple lever-based operation while evolving to better meet on-site needs.

- Newly equipped with a 'grinding volume adjustment function' (0.2mm–0.6mm) that adapts to blade wear - Dual-sided sharpening (relief and rake faces) restores cutting performance to near-new condition - Compatible with nearly all commercially available brush cutter chip saws from 230mm to 305mm - Maintains the same price as the previous model despite incorporating the latest features

The company plans to exhibit at upcoming trade shows, offering live demonstrations so visitors can experience the machine’s sharpening performance and usability firsthand.

In addition to its traditional sales channels—dealers and exhibitions—SK has now established a direct online purchasing system via its official website. This will enable smoother and faster delivery to customers across Japan.

[Comment from the Development Lead]

As the original developer of chip saw sharpeners that have supported field mowing operations for over 30 years, we made the decision to keep the price unchanged in this model update to support farmers and professionals struggling with rising material and fuel costs.

Our proposal goes beyond simply extending blade life. By maintaining sharpness, users can work efficiently even at lower engine speeds, reducing fuel consumption and shortening work time. It also contributes to improved safety by minimizing risks such as flying debris and kickback.

Mowing in extreme heat places a tremendous physical burden on workers. That’s why we remain committed to supporting safer, easier work environments through our products.

We hope visitors to our exhibitions and live demos can experience firsthand how effortlessly the SK-640E restores sharpness and performance.

[Product Specifications]

[Exhibition Information]

- Event: 26th JA Kumamoto Agricultural Machinery and Automobile Grand Exhibition - Dates: July 24–25, 2026 - Venue: GranMesse Kumamoto - Display: Live demonstration and physical display of the SK-640E