Overview

This document provides technical specifications and details for small hole drilling tools with an 11° taper, specifically focusing on H22 (7/8") taper tools. It includes information on drill bits, drill rods, and related components used in precision small hole drilling applications.

Tool Specifications

The tools described are taper tools with an 11° taper angle, designed for small hole drilling. The document lists various sizes and configurations of drill bits and buttons, including dimensions in millimeters and inches, flushing hole sizes, and angles.

Drill Bits and Buttons

• Sizes range from approximately 30 mm to 43 mm in diameter.
• Button configurations vary, with dimensions such as 1×4.5 mm, 2×5 mm, 5×7 mm, etc.
• The angle class for all tools is 35°.
• Part numbers are provided for each size and configuration, facilitating ordering and identification.

Drill Rods

• Drill rods are specified with lengths from 610 mm to 3660 mm (2 ft to 12 ft).
• All rods have a hex shank of 22 mm diameter and length of 108 mm.
• Part numbers correspond to each rod length.

Dimensions and Weight

The document includes detailed dimensional data for each tool component, including diameter (D), length (L), and hex dimensions. Weight information is also provided for various parts, ranging from 0.20 kg to 0.43 kg for drill bits and up to 11.40 kg for larger components.

Part Numbering and Identification

Each tool and component is assigned a unique part number, which encodes size, type, and taper information. This system supports easy identification and inventory management.

Critical Parameters and Recommendations

• The 11° taper angle is a key design feature for compatibility and performance.
• Flushing hole sizes vary by tool size and are critical for effective drilling fluid circulation.
• Button configurations and angles are standardized to 35° to optimize drilling efficiency and durability.
• Hex shank dimensions ensure secure tool attachment and torque transmission.

Summary

This technical document serves as a comprehensive reference for selecting and specifying small hole drilling tools with an 11° taper. It provides essential data on dimensions, weights, part numbers, and configurations to support precise tool selection and application in drilling operations.