Overview

This document provides technical specifications and features for various types of tap adapters and special spindles used in tapping operations, primarily based on JIS (old) standards. It includes detailed dimensional data, application notes, and design features aimed at improving machine compactness, alignment compensation, and ease of spindle design.

1. Tap Adapter Specifications

• Sizes and Tapping Capacity: Tap sizes range from M3 to M22, including pipe taps and light tapping sizes indicated in brackets.
• Dimensions: Key dimensions such as D1, D2, L1, L2, and L are provided in millimeters with tolerances (e.g., ±0.1 mm, h6 fits).
• Adjusting Length (L2): Adjustable length feature allows fine-tuning for different tap lengths and machine setups.
• Radial Floating Feature: Some adapters include radial float to compensate for misalignment between the tap and pre-drilled hole, enhancing tapping accuracy.
• Quick Change Capability: Designed for rapid adapter changes to improve machine uptime.

2. Special Spindle Features

• Short Shank and Projection Length: Enables compact spindle design and easier machining.
• Length Compensation: Spindles and adapters incorporate length compensation to accommodate feed discrepancies between spindle and tap, especially important for machines without pitch feed.
• Tension and Compression Forces: Forces F1 (compression) and F2 (tension) are specified, with example values such as F1=3 and F1+F2=13, indicating mechanical load considerations.
• Application Notes: Suitable for special purpose machines, transfer machines, and various spindle feed types. For machines lacking pitch feed, spindle feed should be set less than tap pitch to avoid damage.

3. Ordering and Usage Recommendations

• Tap sizes follow JIS old standards; sizes in brackets are for light tapping only.
• All dimensions are in millimeters.
• Adapters and spindles are designed to make machines more compact and to compensate for misalignment and feed discrepancies.
• For alignment issues between pre-drilled holes and taps, KTLP tapping chucks are recommended.
• Quick change adapters facilitate efficient tool replacement.

4. Dimensional Tables and Parameters

The document includes detailed dimensional tables listing parameters such as:

• Diameter dimensions (D1, D2, d1, d2, d3)
• Lengths (L, L1, L2, L3)
• Tolerances (e.g., +0.5, +0.145, +0.07, +0.1 mm)
• Radial float allowances and mechanical load limits

These parameters are critical for ensuring compatibility between taps, adapters, and spindles, and for maintaining precision in tapping operations.

5. Key Features Summary

• Compact design with short shank and projection lengths.
• Radial floating adapters to compensate for misalignment.
• Length compensation to handle spindle and tap feed discrepancies.
• Quick change adapters for operational efficiency.
• Compliance with JIS standards for tap sizes.

Conclusion

This technical document serves as a comprehensive guide for selecting and using tap adapters and special spindles in tapping machinery. It emphasizes compact design, alignment compensation, and operational flexibility, supported by precise dimensional data and mechanical specifications.