Modular taper interface with ball track system - Part 1: Dimensions and designation of shanks
1Key Takeaways
This document specifies the dimensions for modular taper interface with ball track system: tapered shanks for automatic and manual tool exchange to be applied on machine tools (e.g. lathe machines, drilling machines, milling machines and turn/milling machine centres). A range of shank sizes is specified and details of …
2Expert Interpretation
This in-depth analysis of ISO 26622-1:2017, the international standard for modular taper interfaces in ball rail systems, covers key tool shank dimensions, clamping force requirements, O-ring sealing standards, and practical application recommendations. It is applicable to the design of automatic and manual tool changing systems for lathes, milling machines, and other machine tools.
Analysis of the core content of the standard
ISO 26622-1:2017 standard specifies the key technical parameters of the taper interface of the ball rail system module, mainly including:
| Technical elements | Key points of the specification | Examples of typical values |
|---|---|---|
| Taper dimensions | Covering the key dimensions of the taper shank of 6 specifications (32-100mm) | d1 tolerance +0.15/+0.1mm |
| Ball rail system | Track width w2=2-3.75mm | Rail diameter d9 tolerance ±0.007mm |
| Clamping force range | Static/dynamic working conditions requirements | TS63 specifications: 36-58kN |
Key technology evolution
Compared with the 2008 version of the standard, the 2017 version has the following major revisions:
- Revised the datum definition of the measurement diameter d2
- Optimized the tolerance zone of the tool change groove diameter d3
- Re-standardized the associated dimensions of the ball rail system and the flange hole (b2/w2/d9, etc.)
Sealing system specifications
The standard mandates the use of fluororubber O-rings (hardness 90 Shore A):
Typical Application: TS50 specification requires a seal with d18=25.07±0.1mm, and can withstand 3.5MPa coolant pressure during high-speed cutting.
Implementation Recommendations
- Selection and Matching: Select a specification based on the machine tool's torque requirements (e.g., TS80 or higher is recommended for heavy cutting).
- Maintenance Points: Check ball rail wear every 500 hours (should be ≤0.01mm).
- Accuracy Verification: Use the geometric and positional tolerance testing methods specified in ISO 1101.