CSJ Crown Drill Bit, 7D Drill Diameter Range 39.00-39.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

CSJ Crown Drill Bit, 7D Drill Diameter Range 39.00-39.99, Front-Locking Body with Internal Cooling for High-Speed Deep-Hole Drilling, Indexable Insert Drill / Side-Locking Drill Tip

$1,216.0000

The CSJ Series 7D Crown Drill Bit is a high-performance indexable insert drill engineered for high-speed, deep-hole drilling applications. Featuring a front-locking insert design and internal coolant channels, it delivers superior clamping stability, effective chip evacuation, and exceptional hole accuracy across a 39.00–39.99 mm diameter range.

Product Introduction

Designed for heavy-duty metal cutting, the CSJ 7D Crown Drill Bit combines the convenience of replaceable indexable tips with the rigid performance of solid tooling. Its innovative front-locking system allows quick and precise tip replacements directly on the machine, reducing setup times and minimizing production downtime. Built with dual internal cooling ports, this drill directs coolant straight to the cutting edge, effectively dissipating extreme heat during deep 7D aspect-ratio drilling while continuously flushing chips out of the hole.

Product Parameters

Parameter	Specification
Tool Type	CSJ Crown Drill Bit / Indexable Insert Drill
Drilling Depth Ratio	7D (7 × Drill Diameter)
Drill Diameter Range	39.00 mm – 39.99 mm
Locking Mechanism	Front-locking / Side-locking replaceable tip
Coolant System	Dual internal cooling channels (Thru-coolant)
Shank Type	Weldon / Side-lock flat shank
Applicable Workpiece Materials	Steel, Stainless Steel, Cast Iron, High-Temp Alloys

Key Functions & Capabilities

Deep-Hole Precision: Achieves stable 7D depth-to-diameter ratio drilling without severe deflection or vibration.
Thermal Control: Internal coolant passages reduce cutting temperatures, preventing thermal cracking and extending tip service life.
High-Efficiency Chip Evacuation: Pressurized internal fluid drives chips smoothly up the flutes to prevent clogging and hole scoring.
Fast Tool Changes: Front-locking structure enables rapid insert indexing without removing the tool holder from the spindle.

Application Scenarios

Heavy Machinery Manufacturing: Large-diameter hole drilling in structural frames, hydraulic cylinders, and excavator components.
Energy & Power Generation: Deep-hole machining on tube sheets, pressure vessels, and wind turbine main shafts.
Automotive & Die/Mold: Deep coolant hole and ejector pin hole creation in large forging dies and heavy vehicle chassis.
General Precision Engineering: High-feed metal removal in medium-to-large steel fabrications and cast iron housing parts.