CSJ Crown Drill Bit, 4D 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

CSJ Crown Drill Bit, 4D 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

$403.0000

1. Short Description

High-efficiency CSJ Crown Drill Bit (4D, Ø20.00–20.99 mm) featuring a front-locking body and internal cooling system. Designed for high-speed, stable, deep-hole drilling with indexable inserts and a secure side-locking drill tip.

2. Product Introduction

The CSJ Crown Drill Bit is a premium-grade, high-performance tooling solution engineered for demanding industrial machining applications. With a 4D depth capability and a precise diameter range of 20.00 mm to 20.99 mm, this tool bridges the gap between solid carbide drills and standard indexable drills.

It utilizes an innovative front-locking body mechanism combined with a side-locking drill tip, ensuring maximum rigidity, exceptional runout precision, and fast insert replacement without removing the body from the holder. Equipped with optimized internal cooling channels, it provides superior chip evacuation and heat dissipation, drastically extending tool life during high-speed, deep-hole operations.

3. Technical Parameters

Parameter	Specifications
Brand / Series	CSJ Crown Drill Series
Drilling Depth Ratio	4D (4 $\times$ Diameter)
Diameter Range ( $\emptyset$ )	20.00 mm – 20.99 mm
Clamping / Locking Type	Front-Locking Body / Side-Locking Drill Tip
Cooling System	Internal Through-Spindle Cooling (Thru-Coolant)
Insert Type	Indexable Crown Insert / Replaceable Carbide Tip
Shank Type	Side-Lock / Weldon Shank (compatible with standard holders)

4. Product Functions & Key Benefits

High-Speed Deep-Hole Drilling: The 4D aspect ratio allows for deep penetration while maintaining excellent hole straightness and surface finish at high feed rates.
Advanced Internal Cooling: Delivers high-pressure coolant directly to the cutting edge, effectively flushing out chips, reducing thermal shock, and preventing chip clogging.
Dual-Locking Stability: The combination of front-locking engineering and a side-locking tip minimizes vibration, ensuring high tracking accuracy and preventing insert displacement under heavy loads.
Cost-Efficient Indexable Design: Eliminates the need for regrinding. When the cutting edge wears out, simply replace the crown insert to restore 100% drilling efficiency instantly.

5. Applications & Industry Scenarios

This versatile drill bit is ideal for heavy-duty metalworking industries where precision and speed are critical.

Applicable Workpiece Materials: Carbon steel, alloy steel, stainless steel, cast iron, and high-temperature alloys.
Target Industries: * Automotive & Aerospace: Machining engine blocks, transmission components, and structural frames.
- Heavy Machinery & Energy: Drilling tube sheets, wind turbine components, and hydraulic cylinders.
- Die & Mold Making: Efficient core drilling and deep ejection pin hole creation.
Compatible Equipment: CNC Milling Machines, Machining Centers, Lathes with powered tooling, and specialized Deep-Hole Boring Machines.