CSJ Crown Drill Bit, 7D Drill Diameter Range 11.50-11.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

$403.0000

CSJ Crown Drill Bit (7D, 11.50–11.99mm)

Front-Locking Body with Internal Cooling

Short Description

High-performance 7D indexable crown drill bit engineered for high-speed, deep-hole drilling. Features a secure front-locking mechanism and optimized internal cooling to deliver maximum stability, rapid chip evacuation, and exceptional hole accuracy within the 11.50–11.99mm diameter range.

Product Introduction

The CSJ Crown Drill Bit represents the next generation of deep-hole drilling technology. Designed specifically for demanding industrial applications, this 7D drill body utilizes an advanced front-locking system paired with a side-locking drill tip structure. This combination ensures seamless insert changes directly on the machine, dramatically reducing downtime. Equipped with dual internal cooling channels, it delivers coolant directly to the cutting edge, mitigating thermal stress and ensuring flawless chip evacuation even at extreme drilling depths.

Product Parameters

Parameter	Specification
Product Series	CSJ Crown Drill Bit Series
Drilling Depth Ratio	7D (7 × Drilling Diameter)
Diameter Range	$\varnothing$ 11.50 mm – $\varnothing$ 11.99 mm
Locking Mechanism	Front-Locking Body / Side-Locking Drill Tip
Cooling System	Dual Thru-Hole Internal Cooling
Insert Type	Indexable Crown Insert / Replaceable Carbide Tip
Shank Type	Flanged Cylindrical Shank (with Weldon flat for side-locking side alignment)

Product Functions & Benefits

High-Speed Deep Drilling: The rigid 7D body architecture maintains exceptional straightness and dimensional accuracy at high penetration rates.
Superior Thermal Management: Internal cooling channels force high-pressure coolant directly to the cutting zone, extending tool life and preventing work hardening.
Rigid Tip Clamping: The front-locking and side-locking dual design minimizes vibration, ensuring a stable cutting process and excellent surface finish.
Cost-Efficient Indexing: No need to resharpen standard solid drills. Simply swap the crown insert when worn, saving tool costs and reducing setup time.

Application Scenarios

Automotive Manufacturing: Deep-hole drilling for engine blocks, crankshafts, and transmission shafts.
Heavy Machinery & Energy: Machining of wind turbine hubs, hydraulic cylinders, and large valve bodies.
Mold & Die Industry: Precision drilling of long cooling lines and core pins in complex injection molds.
Compatible Materials: Optimally suited for Carbon Steel, Alloy Steel, Stainless Steel, Cast Iron, and High-Temperature Alloys.