Overview

This document provides technical specifications and data for small hole drilling tools with a 12° taper, specifically focusing on H22 (7/8") taper tools. It includes detailed dimensions, part numbers, angles, and weights for various components such as drill rods, gauge buttons, and chisel bits.

Tool Specifications

• Taper Angle: 12° taper for all tools listed.
• Tool Type: Includes drill rods with hex shank (22 mm diameter, 108 mm length), gauge buttons, and chisel bits.
• Sizes: Various sizes are provided, ranging from approximately 1 1/4 inch to 2 1/8 inch in diameter, with corresponding metric dimensions (30 mm to 45 mm).
• Flushing Hole Dimensions: Flushing hole sizes vary between 1×4 mm to 6×9 mm depending on the tool size and type.
• Angles: Most tools have a 40° angle, with some having 35° or a combination of 15° and 35° angles.

Part Numbers and Identification

Each tool and component is identified by a unique part number, for example, 30322207-12, 313822-12, and 10220612. These part numbers correspond to specific sizes and configurations of the tools.

Dimensions and Weight

• Drill Rod Lengths: Available lengths include 610 mm, 1220 mm, 1830 mm, 2000 mm, 2440 mm, 3050 mm, 3200 mm, and 3660 mm.
• Weights: Weights range from 0.20 kg to 0.48 kg for individual components, with some larger assemblies weighing up to 11.40 kg.
• Hex Shank Diameter: 22 mm for drill rods.

Usage and Application Notes

The tools are designed for precision small hole drilling applications, with taper tools optimized for 12° taper interfaces. The flushing hole sizes and angles are selected to optimize drilling efficiency and debris removal.

Summary Table Highlights

The document includes tables listing:

• Part numbers linked to specific sizes and angles.
• Dimensions in both metric and imperial units.
• Weight data for each tool component.
• Flushing hole sizes and configurations.

Critical Information

• Ensure correct part number selection based on required hole size and drilling depth.
• Verify taper compatibility (12°) with existing equipment.
• Consider flushing hole size and angle for optimal drilling performance.
• Weight data is essential for handling and equipment load calculations.

Conclusion

This technical document serves as a comprehensive reference for selecting and specifying small hole drilling tools with a 12° taper, providing all necessary dimensions, part numbers, and performance-related parameters to support efficient drilling operations.