CSJ Crown Drill Bit, 7D Drill Diameter Range 19.00-19.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

The CSJ Crown Drill Bit is a high-performance, indexable deep-hole drilling solution engineered for maximum stability and speed. Featuring an advanced front-locking body design, 7D depth capacity, and integrated internal cooling, this tool delivers exceptional precision, efficient chip evacuation, and extended tool life in demanding metalworking applications.

Product Introduction

Engineered for industrial-grade efficiency, the CSJ 7D Crown Drill Bit redefines high-speed, deep-hole drilling. Unlike traditional solid carbide drills, this tool utilizes an innovative indexable/side-locking crown insert tip combined with a front-locking body system. This rigid design allows for rapid tip replacements right on the machine, drastically reducing downtime. Equipped with dual internal coolant channels, it directs high-pressure fluid straight to the cutting edge, rapidly lowering temperatures and flushing out chips to ensure flawless surface finishes even at extreme depths.

Product Parameters

Product Functions (Product Action)

• High-Rigidity Deep Hole Drilling: The 7D structural design enables precise, deflection-free drilling up to seven times the drill’s diameter.

• Rapid Tool Changes: The front-locking mechanism and side-locking insert tip allow operators to swap worn drill crowns quickly without removing the entire tool holder.

• Advanced Thermal Management: Dual internal cooling channels deliver high-pressure coolant directly to the cutting zone, preventing thermal deformation and insert chipping.

• Superior Chip Evacuation: Optimized flute geometry combined with internal cooling forces chips out of the deep hole smoothly, preventing catastrophic tool breakage.

Application Scenarios

The CSJ 7D Crown Drill Bit is widely adopted across heavy industries requiring high-precision deep holes in tough materials (e.g., carbon steel, alloy steel, stainless steel, and cast iron):

• Automotive Manufacturing: Drilling engine blocks, crankshafts, and heavy-duty transmission shafts.

• Aerospace & Defense: High-speed machining of structural components and landing gear parts.

• Mold & Die Industry: Creating deep water cooling lines and ejector pin holes in large injection molds.

• Energy & Power: Machining heat exchanger tube sheets, flanges, and oil/gas pipeline components.

• General Mechanical Engineering: Heavy-duty fabrication requiring repetitive, high-efficiency hole making.