The Carmex Extension With Internal Coolant Bore for Indexable Milling Holders (model E20M10L80) is a precision threading extension designed for CNC milling centers, delivering versatile mill-threading capabilities in a single, efficient tool. It supports helical interpolation workflows and is ideal for shops needing reliable, fast threading across multiple diameters with one adaptable setup.

• Universal threading capability: The same toolholder and insert can produce both right-hand and left-hand threads, eliminating the need for separate tools.
• Multi-diameter coverage: A single insert & toolholder can thread the same thread on many diameters, including external and internal applications.
• Prismatic tail for reliable clamping: The insert’s prismatic tail ensures exact, repeatable alignment and secure engagement in the toolholder.
• Double-sided inserts: Most inserts offer two cutting edges, maximizing usage between replacements.
• One-pass threading: Threading is executed in a single tool pass for faster cycle times and simpler setups.
• Tapered thread capability: MT tooling supports the production of tapered threads when required.
• Internal coolant bore: Integrated coolant passage delivers cooling and lubrication directly to the cutting zone for better chip control and tool life.
• Coating for longer tool life: A multilayer coating process enhances durability and reduces wear during extended production runs.
• Cost and power efficiency: Lower tooling costs compared to taps and dies, plus reduced machine power needs enable smaller machines to produce larger threads in fewer operations.

This extension is designed to boost productivity in threading operations, especially in environments where reducing tool changes and maximizing material removal rates matters. It’s well-suited for job shops and manufacturers that need dependable internal and external thread production, precise shoulders in blind holes, and a durable, economical solution that pairs with existing indexable milling holders.