CSJ Crown Drill Bit, 7D Drill Diameter Range 20.00-20.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

Product Overview

Short Description

High-performance CSJ Crown Drill Bit (7D) featuring a front-locking mechanism and optimized internal cooling. Designed for high-speed, high-precision deep-hole drilling across a 20.00–20.99 mm diameter range, this indexable insert drill delivers exceptional chip evacuation, extended tool life, and seamless tip replacement.

Product Introduction

The CSJ 7D Crown Drill Bit represents the next generation of deep-hole drilling technology. Engineered for demanding industrial machining, it utilizes a robust front-locking body paired with a secure side-locking drill tip mechanism. This dual-security configuration allows for rapid insert changes directly on the machine, drastically minimizing downtime. With a 7D depth-to-diameter ratio and specialized integrated internal cooling channels, this indexable tool mitigates heat buildup at the cutting zone, ensures superior structural rigidity, and maintains impeccable hole straightness even during continuous high-speed operations.

Technical Profile

Product Parameters

Performance & Applications

Product Function & Benefits

• High-Speed Deep Drilling: The 7D design allows for efficient, single-pass deep-hole drilling up to seven times the diameter without the need for frequent pecking cycles.

• Advanced Thermal Management: Dual internal cooling holes deliver high-pressure coolant directly to the cutting edge, rapidly lowering temperatures and forcing chips out of the flute.

• Rigid Front-Locking Design: The front-locking mechanism combined with side-locking inserts ensures maximum clamping stability, drastically reducing vibration and preventing tip deflection.

• Cost-Efficient Indexable System: Eliminate the need for regrinding. When the cutting edge wears out, simply swap the crown tip while keeping the heavy-duty drill body intact.

Application Scenarios

This premium drilling system is highly optimized for heavy industrial applications requiring deep, precise holes:

• Automotive & Aerospace: Machining engine blocks, crankshafts, landing gear components, and structural frames.

• Heavy Machinery & Energy: Drilling tube sheets for heat exchangers, wind turbine hubs, and oil/gas valves.

• Mold & Die Manufacturing: Creating long coolant lines and ejector pin holes in massive mold blocks.

• Compatible Materials: Highly effective in Carbon Steel, Alloy Steel, Stainless Steel, Cast Iron, and High-Temperature Alloys.