CSJ Crown Drill Bit, 7D Drill Diameter Range 13.00-13.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

The CSJ Crown Drill Bit (7D) is a premium, high-speed deep-hole indexable drilling solution engineered for maximum efficiency, precision, and longevity. Featuring a rigid front-locking system and integrated internal cooling channels, this tool delivers exceptional stability and chip evacuation when drilling depths up to 7 times the diameter ($7 \times D$). Designed for seamless side-locking insert replacement, it minimizes downtime and maximizes productivity in heavy-duty manufacturing environments.

1. Short Description

High-speed 7D indexable crown drill bit featuring a secure front-locking body, internal cooling, and side-locking replaceable tips. Designed for precision deep-hole drilling across a 13.00mm to 13.99mm diameter range.

2. Product Benefits & Functions

• High-Speed Deep Drilling (7D): Effortlessly penetrates materials up to seven times the drill’s diameter without compromising structural straightness or surface finish.

• Advanced Internal Cooling: Dual through-coolant channels deliver high-pressure fluid directly to the cutting edges, drastically reducing thermal stress and ensuring rapid chip evacuation.

• Rigid Front-Locking Body: Provides maximum clamping force and high torque resistance, minimizing vibration and preventing deflection during high-feed operations.

• Cost-Efficient Side-Locking Tips: The indexable crown insert can be swapped quickly via the side-locking mechanism without removing the entire tool body from the machine, significantly cutting down-time.

3. Product Specifications

4. Typical Applications & Industry Scenarios

This tool is purpose-built for high-production CNC machining centers, specialized deep-hole drilling rigs, and heavy-duty milling machines. It excels in the following sectors:

• Automotive Manufacturing: Drilling engine blocks, crankshafts, and fluid transmission channels.

• Aerospace & Defense: Creating deep, precise fastening and weight-reduction holes in tough alloys.

• Mold & Die Industry: Machining deep water cooling lines and ejector pin holes in heavy mold bases.

• Heavy Machinery & Energy: Processing tube sheets for heat exchangers, hydraulic cylinders, and structural components.