CSJ Crown Drill Bit, 7D Drill Diameter Range 17.00-17.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

Short Description

Engineered for maximum stability in deep-hole operations, the CSJ Crown Drill Bit features a 7D aspect ratio and a front-locking design with integrated internal cooling. Designed for a 17.00–17.99 mm diameter range, this indexable side-locking tool delivers exceptional chip evacuation and precise tolerances in high-speed manufacturing.

Product Overview

The CSJ 7D Crown Drill Bit is a high-performance, indexable drilling system engineered specifically for challenging deep-hole applications. Featuring an advanced front-locking body structure, it ensures absolute rigidity and zero insert movement even under heavy axial loads.

Equipped with precision-engineered internal cooling channels, the tool delivers high-pressure coolant directly to the cutting edges. This rapidly drops cutting temperatures, eliminates thermal deformation, and forces chips out of deep holes effortlessly. The side-locking insert mechanism allows for quick, seamless tip replacements directly on the machine, drastically reducing downtime and boosting your shop’s throughput.

Product Technical Parameters

Product Functions & Benefits

• Deflection-Free 7D Drilling: The rigid front-locking system prevents the drill body from wandering, maintaining strict straightness and hole cylindricality across deep 7D depths.

• Active Thermal Control: Dual internal cooling holes spray coolant directly onto the friction zone, significantly extending insert tool life and preventing work-hardening of the workpiece.

• Rapid Chip Evacuation: Wide, polished flutes combined with internal coolant pressure prevent chip packing—the number one cause of tool breakage in deep holes.

• Cost-Efficient Indexing: No need to resharpen standard solid carbide drills. Simply swap the side-locking crown tip when worn to maintain a brand-new cutting edge instantly.

Target Applications & Industry Scenarios

This tool is built for heavy-duty CNC machining centers, multitasking turn-mill machines, and dedicated deep-hole drilling equipment.

• Automotive & Aerospace: Drilling deep oil galleries, engine block fluid channels, and landing gear components.

• Heavy Machinery & Energy: Machining tube sheets for heat exchangers, hydraulic cylinders, and turbine components.

• Die & Mold Manufacturing: Creating deep cooling lines and ejector pin holes in high-tensile tool steels.

• Material Compatibility: Highly optimized for Carbon Steels, Alloy Steels, Stainless Steels (300/400 series), and Cast Iron.