Pneumatic fluid power - Cylinders, 1000 kPa (10 bar) series - Mounting dimensions of rod-end clevises
1Key Takeaways
This document specifies the mounting dimensions required for interchangeability of rod-end clevises of pneumatic cylinders. The rod-end clevises have been designed specifically for use with 1000 kPa [10 bar1)] series cylinders manufactured in accordance with ISO 6432 and ISO 15552, but this does not limit their applica…
2Expert Interpretation
This article provides an in-depth analysis of the ISO 8140:2018 standard for the installation dimensions of rod-end yokes for 1000 kPa series pneumatic cylinders, covering key dimensional tolerances, application guidance, and its relationship with ISO 6432/15552, providing a standardized reference for pneumatic system design.
Analysis of the core content of the standard
The fourth edition of ISO 8140:2018 clearly stipulates the installation dimensions of the rod end fork (AP2 type) of pneumatic cylinders, and is mainly suitable for use with ISO 6432 (8-25mm cylinder diameter), ISO 15552 (32-320mm cylinder diameter) and ISO 21287 (20-100mm cylinder diameter) standard cylinders.
Key technical parameters
| Thread specification | CK aperture (mm) | ER length (mm) | Tolerance requirements |
|---|---|---|---|
| M12×1.25 | 20 | 32 | H9 |
| M16×1.5 | 22 | 40 | +0.5/+0.15mm |
| M20×1.5 | 28 | 48 | f8 recommended |
Version Update Highlights
Main changes compared to 2009 version:
1. Updated the list of normative references
2. Corrected the starting point of ER dimensioning in Figure 1 (changed to hole centerline datum)
Application Guide
Installation Specifications: A locking nut is required to secure the rod end yoke. It is recommended that the bearing shaft use f8 tolerance grade (refer to ISO 286-2)
Lubrication Requirements: Determine the lubrication method and frequency based on actual working conditions to ensure stable performance of the rod end yoke
Standard Implementation Recommendations
- When ordering, please specify the AP2 model and CK bore diameter (e.g., AP2 ISO 8140:—, 20).
- It is recommended that the standard statement be used for product labeling: "Conforms to the installation dimension requirements of ISO 8140:2018 rod end yokes."
- When used with ISO 15552 cylinders, the maximum force compatibility must be verified.