Overview

This document provides a comprehensive technical overview of the Tungsten Carbide Drill with Internal Coolant Series, emphasizing enhanced drilling performance and extended tool life.

Material and Design Features

• Material: Constructed from tungsten carbide steel, offering high strength and durability.
• Internal Coolant Design: Central coolant hole facilitates efficient chip evacuation and prolongs tool lifespan.
• Chip Removal: Unique flute geometry ensures superior chip removal efficiency.
• Coating: TiAlN coating enhances oxidation resistance, prevents rust, and improves wear resistance.
• Edge Treatment: Special cutting edge treatment increases strength and stability for consistent drilling performance.

Comparison with Other Drill Types

A comparative table highlights the advantages of tungsten carbide drills with internal coolant over powdered and HSS drills:

• Stability: Very good (++), superior to neutral ratings of other types.
• Cutting Depth: Very good (++), allowing deeper drilling without leading holes.
• Internal Coolant: Available only in tungsten carbide drills (++), absent in others.
• Wear Resistance and Tool Life: Rated good (+), better than alternatives.
• Leading Hole Process: Not required (++), unlike other drills.

Coding System

The drill coding system defines drill specifications based on:

• Material to Machine: Codes such as DR20P (general steel), DR30M (stainless steel), DR40K (cast iron), DR50N (non-ferrous alloys), DR60S (refractory alloys), DR70H (high hardness materials).
• Shank Type: A (Straight DIN-6535HA), B (Flat DIN-6535HB), E (Beveled DIN-6535HE), M (Morse taper MT).
• Drilling Depth: Numeric codes (3, 5, 8, 12, 15) indicating multiples of drill diameter (e.g., 3xD).
• Coolant Type: C for internal coolant, N for external coolant.
• Diameter: Indicated by code D followed by size.

Specifications and Product Range

The product range includes multiple series such as DR20P-A5-C, DR20P-A8-C, DR20P-A12-C, DR20P-A15-C, and DR30M-A5-C, offering extensive size options. Key parameters include:

• Length (L), Diameter (D), Shank Diameter (d), Flute Length (H), Thickness (T), and Weight (KGS).
• Standard point angle of 140°, with some models at 135°.
• Suitability for various materials: alloyed steels, stainless steels, cast iron, refractory alloys, and high hardness materials.
• Many sizes are available as standard stock.

Cutting Conditions and Recommendations

Recommended cutting speeds and feed rates are provided for different materials and drill diameters to optimize performance and tool life:

• Alloyed Steels (P): Cutting speed ~80 m/min (range 60-110), feed rates vary by diameter (e.g., Ø3: 0.13 mm/rev).
• Stainless Steels (M): Cutting speed ~50 m/min (40-60), lower feed rates (e.g., Ø3: 0.06 mm/rev).
• Cast Iron (K): Cutting speed ~100 m/min (60-140), higher feed rates (e.g., Ø3: 0.15 mm/rev).
• Refractory Alloys (S): Cutting speed ~35 m/min (20-50), feed rates from 0.08 to 0.14 mm/rev depending on diameter.

Critical Information and Best Practices

• Utilize internal coolant drills to enhance chip evacuation and extend tool life.
• Select drill codes carefully based on material, shank type, drilling depth, and coolant method for optimal results.
• Adhere strictly to recommended cutting speeds and feed rates to maintain stability and wear resistance.
• Standard point angle is 140°, verify if 135° is needed for specific applications.
• Maintain drills properly to preserve TiAlN coating effectiveness against oxidation and wear.

Product Specifications

Drill diameters range from 0.06 mm to 0.14 mm, including intermediate sizes (0.08, 0.09, 0.10, 0.12 mm), each with specified tolerance ranges indicating acceptable size variation.

Company Information

The manufacturer is based in Taichung City, Taiwan (No. 232, Wuquan Road, Qingshui District) with additional facilities in Kunshan, Jiangsu Province, China (Building 12, J District, Mold City, Lufeng East Road).

Contact numbers: Taiwan +886-4-26265252 / +886-4-26267941; China +86-0512-57874601 / +86-0512-57874602.

Online Presence and Additional Services

The company maintains an online presence via its website (www.chain-headway.com) and social media platforms including YouTube, Twitter, and Facebook, targeting regions such as Taiwan, Myanmar, Philippines, and India.

Further service locations and detailed contact information are accessible through the official website.