Overview

This document provides detailed technical specifications, usage guidelines, and accessory information for a range of high-speed drills featuring square inserts, produced by Chain Headway Machine Tools Co., Ltd. The drills are designed for efficient chip evacuation and high precision in various drilling applications.

1. Product Description and Features

• Design: Long trough type design enhances chip evacuation capability.
• Special Surface Finishing: The drills have a special surface finishing to improve performance.
• Cutting Method: Utilizes a special cutting method (TSP) optimized for oblique face enlargement and cross-hole drilling.
• Drilling Conditions: Suitable for half holes, concave faces, and irregular bend layers with specific limitations on layer gap (<0.2mm) and slope angle (<6 degrees).
• Feed Rate Recommendations: Reduce feed rate by 30-50% during entry and finish phases to improve tool life and hole quality.
• Coolant Use: Use coolant at exact pressure to stabilize operation and extend cutter life.

2. Specifications

The document lists multiple drill models categorized by diameter (Dx2, Dx3, Dx4, Dx5), with detailed dimensions and weights:

• Parameters include: Overall length (OAL), cutting length (LH), usable length (LU), cutting face length (LCF), drill core diameter (DC), and insert specifications.
• Insert Types: Various insert specifications such as SP.0502, SP.0602, SP.07T3, SP.0904, SP.1104, and SP.1405 are used depending on drill size.
• Weight: Drill weights range from approximately 0.18 kg to over 2.6 kg depending on size.

3. Accessories and Tooling

• Insert Screws and Wrenches: Specific screw sizes and torque values are provided for each insert type, e.g., SP.0502 requires M2 screws with 0.6 N·m torque, SP.0904 requires M3.5 screws with 2.0 N·m torque.
• Wrench Types: Torque wrenches T6, T7, T8, T10, T15, and T20 are specified for different screw sizes.

4. Usage Guidelines and Best Practices

• Drilling Irregular Surfaces: Slope angle must be less than 6 degrees; use exact drills without pilot holes.
• Layer Gap: For stacked layers, gap must be less than 0.2 mm to ensure drilling quality.
• Feed Rate Adjustment: Reduce feed rate by 30-50% during entry and finish to avoid tool damage.
• Coolant Pressure: Maintain exact coolant pressure for stable operation and longer tool life.

5. Material Compatibility and Cutting Conditions

• The drills are suitable for a wide range of materials including alloyed steels, stainless steels, cast iron, aluminum alloys, refractory alloys, and hard materials.
• Cutting conditions are categorized into continuous cutting, general cutting, and interrupted cutting, with recommended feed rates and speeds for different material grades.

6. Product Identification and Ordering

• Each drill model is identified by a code indicating diameter, length, and insert type.
• Sets are available with corresponding weights and recommended screw torque specifications.

7. Manufacturer Information

Chain Headway Machine Tools Co., Ltd. is the manufacturer, with contact and social media information provided for further support and product updates.

Critical Information Summary

• Maintain layer gap below 0.2 mm and slope angle below 6 degrees for optimal drilling.
• Reduce feed rate by 30-50% during entry and finish phases.
• Use exact drill sizes; pilot drills are not recommended.
• Apply coolant at specified pressure to enhance tool life.
• Follow specified torque values for insert screws to ensure secure assembly.
• Select appropriate insert type based on drill size and material.