Split-Sleeve Process Tooling in Aircraft and Aerospace Industry
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Split-sleeve coldworking was developed in the early 1970's as a way to improve joint fatigue performance by expanding or compressing the material around the fastener hole.
Split-sleeve Process Explained
In the split-sleeve process, this is accomplished by inserting a mandrel that has been prefitted with a disposable sleeve, through a fastener hole, and pulling the mandrel back through the sleeve. The internal surface of the sleeve is pre-lubricated with a special dry lubricant, protecting the mandrel from excessive wear, and reducing the amount of force required to pull the mandrel.
The Engineering Handout WCI-EH-9201 PDF > Table of Contents
- Tooling Descriptions
- Split Sleeve Coldworking of Fastener Holes—Procedures
- CA Tooling–Titanium and High Strength Steel Alloys
- CB Tooling–Aluminum, High Interference
- CW Tooling–Aluminum, Low Interference
- Metric Tables – High Interference, CA and CB Tooling
- CRACKARRESTOR–Stop Drill Procedures
- Maintenance & Repair Tool Kits