Internal expansion rubber-flex chuck for blind-hole and semi-through-hole workpieces.
Blind-Hole Expanding Rubber Collet Chuck
KORRETTO blind-hole expanding rubber collet chuck is used for internal clamping of workpieces with blind holes, semi-through holes or internal locating surfaces. The rubber-flex expanding element supports the inside diameter and expands to hold the part from the bore. This page covers the blind-hole expanding chuck assembly, not the expanding mandrel collection page and not the through-hole outside-clamping rubber-flex chuck.
Product Overview
The blind-hole expanding rubber collet chuck is selected when the part cannot be held effectively from the outside diameter or when outside surfaces must remain open for machining. The internal expansion structure supports the workpiece from the bore and can help reduce outside-surface interference.
Selection should confirm the bore diameter, bore depth, workpiece tolerance, expansion range, draw force, radial clamping force, maximum speed and whether the application is blind-hole, semi-through-hole or another internal clamping layout.
Key Features
| Feature | Description |
|---|---|
| Internal expansion clamping | Holds the workpiece from the inside diameter. |
| Blind-hole application | Suitable for blind-hole and semi-through-hole parts. |
| Rubber-flex expansion element | Provides distributed contact inside the bore. |
| Chuck assembly page | Covers the complete blind-hole expanding rubber-flex chuck assembly. |
| Separate from collection page | Not the same as the general Expanding Mandrels collection page. |
Typical Applications
- Blind-hole workpieces
- Semi-through-hole workpieces
- Parts requiring outside-surface machining
- Bore-located components
- Thin-wall or mark-sensitive parts
- Internal expansion CNC clamping
Technical Data and Dimensions
Use the drawing and parameter tables to check chuck structure, stroke, maximum draw force, maximum radial clamping force, clamping range, recommended workpiece tolerance and maximum speed.
| No. | Structure Name |
|---|---|
| 1 | Clamping Sleeve |
| 2 | High-Precision Chuck Body |
| Model | Stroke (mm) | Maximum Draw Force (kN) | Maximum Radial Clamping Force (kN) | Clamping Range (mm) | Recommended Workpiece Tolerance (mm) | Maximum Speed (r/min) |
|---|---|---|---|---|---|---|
| A0 | 1.5+1.5 | 10 | 42 | 8–13 | ±0.2 | 7000 |
| A1 | 1.5+2 | 10 | 42 | 13–19 | ±0.25 | 7000 |
| A2 | 1.5+2 | 16 | 56 | 19–26 | ±0.25 | 7000 |
| A3 | 1.5+2.5 | 16 | 60 | 26–38 | ±0.3 | 6000 |
| A4 | 1.5+2.5 | 20 | 80 | 38–50 | ±0.35 | 5000 |
Related Rubber-Flex Pages
FAQ
What is a blind-hole expanding rubber collet chuck used for?
It is used for internal expansion clamping of workpieces with blind holes, semi-through holes or suitable internal locating surfaces.
Is this the same as the Expanding Mandrels collection page?
No. This is a detail page for the blind-hole expanding rubber-flex chuck assembly. The collection page covers a broader range of internal expansion solutions.
Is this the same as the through-hole rubber-flex chuck?
No. The through-hole rubber-flex chuck clamps from the outside. This product clamps from the inside by expansion.
What should be checked before selection?
Check bore diameter, bore depth, expansion range, workpiece tolerance, draw force, clamping force, maximum speed and support length.
Can this be used when the outside diameter must be machined?
Yes. Internal expansion clamping is often selected when the outside surface must remain accessible for machining.
What information should I send?
Send the workpiece drawing, bore size, bore depth, tolerance, material, machining process, machine layout and required accuracy.