Halnn offers high-performance solid deep hole drills designed for exceptional precision, long tool life, and efficient chip evacuation—making them ideal for drilling deep and narrow holes in hardened materials. Our solid deep hole drills are crafted using ultra-fine carbide materials and advanced geometries to ensure smooth, accurate machining even under the most demanding industrial conditions.

With a strong focus on innovation and customer-oriented solutions, Halnn delivers cutting tools that improve productivity and reduce machining costs across industries.

Application Range

·Processing diameter range: 12D-50D

·Effective drilling depth: 400mm

Key Features of Halnn Solid Deep Hole Drills  

Wide Processing Diameter Range  

Supports drilling with diameter-to-depth ratios ranging from 12D to 50D, making it ideal for deep hole machining.  

Exceptional Drilling Depth  

Capable of drilling depths up to 400mm, ensuring flexibility for various machining requirements.  

 Cost-Effective Solution  

Designed to provide long tool life and consistent performance, reducing downtime and tooling costs.  

 Advanced Design for Superior Results  

Optimized cutting geometry for enhanced chip evacuation and minimized heat generation.  

Internal coolant channels ensure effective cooling and lubrication, improving tool life and hole quality.  

Specification

Harden® HD·12×D	Harden® HD·15×D	Harden® HD·20×D
Harden® HD·25×D	Harden® HD·30×D	Harden® HD·40×D

Application Cases

	Workpiece: crankshaft              Hardness: HRC28-32 Workpiece material: 42CrMo   Drilling depth: 150mm Machine: vertical machining center  Drilling method: continuous machining
	Comparison test	Original inserts	Halnn inserts
	Diameter	D8 internal coolant  deep hole drill	D8 internal coolant  deep hole drill
	Vc(m/min)	62.8m/min	62.8m/min
	F(mm/min)	500mm/min	500mm/min
	n(r/min)	2500r/min	2500r/min
	Processed Quantity	180 pcs	220 pcs
	Results: Under the same processing parameters, the life of Halnn's insert increased by 22%.

Halnn Tool Design & Manufacturing Advantages

1. Optimized Chip Breaker & Rake Angle Design: A unique flute geometry and specialized core taper ensure smooth and efficient chip breaking and evacuation.

2. Special Drill Tip & Cutting Edge Design: The optimized point angle and positive rake angle at the chisel edge enhance centering accuracy, reduce cutting 

resistance, and promote the formation of easily breakable conical spiral chips, significantly improving chip control.

3. Large Flute Opening & Four-Flute Guide Design: Provides enhanced cutting stability and reduced cutting resistance, ensuring a smoother drilling process.

4. High-Feed Rate Design: Allows for significantly improved processing efficiency, reducing overall machining time.

5. Advanced Manufacturing Process: Utilizing imported machine tools with P-axis configuration and full-length tool support ensures the reliability and precision required for producing 40:1 aspect ratio deep-hole drills.