CSJ Crown Drill Bit, 7D Drill Diameter Range 27.00-27.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

Product Short Description

The CSJ Crown Drill Bit (7D) is a high-performance, front-locking indexable drill engineered for deep-hole drilling applications. Designed to fit a 27.00–27.99 mm diameter range, this drill features a side-locking tip mechanism and integrated internal cooling to deliver maximum stability, rapid chip evacuation, and high-speed precision in demanding industrial machining.

Product Introduction

Engineered for ultimate productivity and durability, the CSJ Series Crown Drill Bit features a 7xD deep-hole drilling capacity that handles challenging metalworking tasks with ease. Its innovative front-locking body combined with a side-locking tip system guarantees superior insert stability, preventing head displacement during high-feed operations. Equipped with internal cooling channels, it forces coolant directly to the cutting edge to reduce heat build-up, minimize tool wear, and ensure smooth chip clearance. With an interchangeable crown design, this indexable drill drastically reduces downtime and tooling costs by allowing quick insert changes directly on the machine.

Product Parameters

• Product Type: Crown Drill Bit / Indexable Insert Drill

• Model Series: CSJ Series

• Drilling Depth Ratio: 7D (7 x Diameter)

• Drill Diameter Range: 27.00 mm – 27.99 mm

• Cooling System: Internal Through-Coolant

• Locking Mechanism: Front-Locking Body / Side-Locking Drill Tip

• Insert Type: Interchangeable Crown / Indexable Tip

• Applicable Materials: Steel, Stainless Steel, Cast Iron, High-Temperature Alloys

Key Functions & Features

• Deep-Hole Efficiency (7D): Reaches depths up to seven times its diameter without losing accuracy or drill rigidity.

• Internal Coolant Flow: Delivers high-pressure fluid directly to the cutting zone for instant cooling and reliable chip expulsion.

• Front & Side-Locking Stability: Dual-securing design provides ultra-firm tip holding, reducing vibration and extending insert life.

• Cost-Effective Indexing: Replace only the worn crown/tip instead of the entire drill body, reducing tool replacement costs and downtime.

• High-Speed Machining: Optimized geometry enables higher feed rates and faster spindle speeds while maintaining high surface finish quality.

Application Scenarios

• Heavy Machinery Manufacturing: Machining large engine blocks, hydraulic cylinders, and power transmission components.

• Oil & Gas Industry: Deep-hole drilling in thick-walled piping, valve bodies, and flange connectors.

• Automotive & Transportation: High-volume drilling of drive shafts, axles, and structural steel components.

• Mold & Die Fabrication: Creating deep cooling channels, ejector pin holes, and core plates.

• General Precision Engineering: CNC machining centers, horizontal boring mills, and lathe setups requiring deep, precise holes.