Pull-Back Expanding Collet for Blind Bores
The clip first shows the sleeve opening and closing, then a part being fitted and checked on its outside diameter. Pull-back motion expands the sleeve. Forward motion contracts it. The English narration follows the demonstrated clamp, release and sleeve-and-stop changeover sequence.
How the grip works
This pull-back expanding chuck grips inside the workpiece bore. The cylinder pulls back to expand the sleeve. A forward stroke contracts it and releases the part. Metal segments contact the bore wall; vulcanised rubber joins the segments. Internal gripping leaves the outside machining surface clear of external jaws.
For a blind bore, specify the bore diameter, usable depth, contact length and face stop. The video shows the sleeve and locating plate as the changeover parts. Replacing them adapts the contact and axial location while retaining the chuck body.
What to check in this setup
- Provide blind-bore diameter and usable depth.
- Locate the face stop against the part.
- Match sleeve diameter and contact length at changeover.