CSJ Crown Drill Bit, 7D Drill Diameter Range 32.00-32.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

The CSJ Series Crown Drill Bit (7D) is a high-performance indexable/side-locking deep-hole drill engineered for rapid, precision drilling. Featuring a front-locking body, 7xD drilling depth capacity, and internal cooling channels, it delivers superior chip evacuation, high-speed cutting efficiency, and extended tool life.

Product Introduction

Designed for high-efficiency metal cutting, the CSJ Crown Drill Bit combines the stability of solid tooling with the cost-efficiency of indexable inserts. Its 7D (7 times diameter) depth-to-diameter ratio enables deep-hole processing in a single pass without peck drilling. The innovative front-locking system allows for quick and secure tip replacement directly on the machine, minimizing setup downtime. Equipped with internal coolant channels, it effectively flushes out chips, reduces thermal friction, and ensures excellent surface finish even under heavy-cut conditions.

Product Parameters

Product Functions & Key Features

• Deep-Hole Penetration: Achieves up to 7D depth in a single continuous pass without requiring peck drilling steps.

• Rapid Tool Changes: Front-locking body enables quick insert or drill-tip replacement without dismounting the tool holder, drastically reducing downtime.

• Internal Cooling & Chip Removal: Pressurized internal coolant delivers fluid directly to the cutting edge, reducing heat build-up and blowing chips cleanly out of deep bores.

• High Rigidity & Stability: Side-locking tip design prevents chatter and deformation, ensuring tight hole tolerances and smooth surface finishes.

• Cost Efficiency: Replaceable crown tip system eliminates the need for tool regrinding and lowers per-hole processing costs.

Application Scenarios

• Heavy Machinery & Automotive: Machining engine blocks, crankshaft passages, transmission housings, and hydraulic cylinders.

• Energy & Power Generation: Drilling structural holes in wind turbine hubs, steam turbine components, and oil field drilling equipment.

• Mold & Die Manufacturing: Deep coolant passage drilling in large injection molds and forging dies.

• General Precision Engineering: High-efficiency deep-hole processing across medium-to-large steel components, alloy steels, stainless steel, and cast iron.