The BT40 Shrink Fit Chuck with Front Face Coolant is a precision toolholding solution designed for BT40 spindle setups. It’s ideal for engineers, machinists, buyers, tradespeople, and hobbyists who need secure, repeatable tool retention and reduced tool runout at high speeds.

Built to BT MAS403 (JIS 6339) Form AD/B standards and featuring integrated front coolant channels, this chuck delivers efficient cooling during demanding milling. With an 18 mm shank and 120 mm length, it’s balanced to G2.5 @ 25,000 RPM and set at a precise 4.5-degree contact angle for reliable performance across materials.

• High-strength shrink-fit clamping: Delivers firm, slip-resistant grip for demanding milling cuts, improving rigidity, reducing runout, and delivering repeatable toolholding at high speeds.
• Front-face coolant channels: Integrated coolant pathways keep tool and workpiece temperatures under control during heavy milling, enhancing tool life and maintaining accuracy on long runs.
• Precision balance for high-speed reliability: Balanced to G2.5 @ 25,000 RPM with a precise 4.5-degree contact angle, delivering smooth operation, reduced vibration, and cleaner finishes.

Together, these features translate into fewer interruptions and more predictable results: secure, repeatable toolholding even in demanding passes; effective cooling that keeps tolerances stable; and smooth, high-speed performance for cleaner finishes. The chuck’s BT40 compatibility, MAS403/JIS 6339 compliance, and Form AD/B design ensure reliable integration across many machines, while the 18 mm shank and 120 mm length simplify installation and keep your workflow moving efficiently.