CSJ Crown Drill Bit, 7D Drill Diameter Range 8.00-8.49, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

CSJ Crown Drill Bit (7D Series)

High-Speed Deep-Hole Indexable Drill with Internal Cooling

Product Description

The CSJ Crown Drill Bit (7D Series) is a premium, high-efficiency deep-hole drilling solution designed for precision machining. Featuring an innovative front-locking body design paired with a secure side-locking indexable drill tip, this tool ensures maximum rigidity and quick insert replacements. Engineered with internal cooling channels, it effectively evacuates chips and dissipates heat, making it the ultimate choice for high-speed, continuous deep-hole applications.

Product Features (Introduction)

• 7D Deep-Hole Capability: Specially engineered to handle drilling depths up to 7 times the drill diameter (7D) while maintaining exceptional straightness and surface finish.

• Front-Locking Body Design: The advanced front-locking mechanism provides rock-solid stability, minimizing vibration even under high-feed conditions.

• Dual-Locking Integrity: Combines a robust front-locking body with a side-locking insert tip to guarantee that the insert remains completely stable during heavy-load operations.

• Internal Cooling System: Dual internal coolant holes deliver high-pressure fluid directly to the cutting edge, drastically reducing thermal wear and ensuring seamless chip evacuation from deep cavities.

• Indexable Efficiency: Eliminates the need for regrinding. When the cutting edge wears out, simply replace the indexable crown tip to minimize downtime and lower tool costs.

Product Parameters

Product Functions (How it Works)

• Precise Hole Penetration: Delivers high-accuracy holes within the 8.00–8.49 mm range without requiring a pilot hole in most materials.

• Thermal Protection: Continuous internal coolant flow keeps the cutting edge cool, preventing work-hardening of the workpiece and extending insert life.

• Rapid Chip Flushing: Forwards the chips out of the deep 7D channel instantly, eliminating chip packing and preventing catastrophic tool breakage.

Application Scenarios

The CSJ 7D Crown Drill is built for heavy-duty industrial environments and CNC machining centers, specifically targeting:

• Automotive Manufacturing: Drilling deep oil galleries, engine blocks, and crankshaft fluid lines.

• Aerospace & Defense: Machining high-strength alloys, landing gear components, and structural frames requiring tight tolerances.

• Mold & Die Making: Creating deep ejector pin holes, core cooling channels, and complex water lines.

• Heavy Machinery: Processing hydraulic cylinders, valves, and massive power generation components.

• Compatible Materials: Excellent performance in carbon steel, alloy steel, stainless steel, cast iron, and high-temperature exotic alloys.