Elastic diaphragm collet for precision diaphragm chuck systems and low-deformation clamping.
Diaphragm Collet
KORRETTO diaphragm collet is an elastic clamping element used in diaphragm-style precision workholding. It supports controlled clamping contact, repeatable holding and low-deformation support for suitable workpieces. This page covers the diaphragm collet itself, not a complete diaphragm chuck assembly and not the diaphragm chuck collection page.
Product Overview
The diaphragm collet is selected when the clamping element needs elastic movement and controlled contact with the workpiece. It may be used as part of a matched diaphragm chuck or fixture system, depending on the machine interface and workpiece requirements.
Selection should confirm the workpiece diameter, clamping range, collet form, material, contact length, matching chuck structure, repeatability requirement and machining process.
Key Features
| Feature | Description |
|---|---|
| Diaphragm-style elastic element | Used as the clamping element in suitable diaphragm workholding systems. |
| Separate from chuck assemblies | This page covers the collet, not a complete diaphragm chuck. |
| Controlled workpiece contact | Suitable for precision clamping where repeatability and contact stability matter. |
| Application-specific matching | Must be matched with the correct chuck or fixture structure. |
| Useful for low-deformation clamping | Helps support parts that require gentle and repeatable holding. |
Typical Applications
- Precision diaphragm clamping elements
- Workpieces requiring controlled elastic contact
- Matched chuck or fixture systems
- Low-deformation finishing setups
- Repeat clamping applications
Technical Data for Diaphragm Collets
Use the drawing and parameter table to check collet size, clamping range, connection dimensions, contact form, compatible chuck structure and workpiece requirements.
| Parameter | JD-60 | JD-70 | JD-100 | JD-150 | ||||
|---|---|---|---|---|---|---|---|---|
| Type | External | Internal | External | Internal | External | Internal | External | Internal |
| ΦA (mm) | 65 | 70 | 75 | 80 | 105 | 110 | 155 | 160 |
| ΦB (mm) | 45 | 60 | 50 | 70 | 80 | 100 | 120 | 150 |
| C Clamping Range (mm) | 3–60 | 6–80 | 3–100 | 6–140 | 3–150 | 6–170 | 5–200 | 10–220 |
| ΦD (mm) | 52 | 52 | 60 | 60 | 90 | 90 | 135 | 135 |
| E (mm) | 20 | 20 | 22 | 22 | 29 | 29 | 35 | 35 |
| F (Mounting Hole) | 6-M4 CSK | 6-M4 CSK | 6-M5 CSK | 6-M5 CSK | 8-M5 CSK | 8-M5 CSK | 8-M6 CSK | 8-M6 CSK |
| Gripping Length | Custom length available on request | |||||||
Related Diaphragm Chuck Pages
FAQ
What is a diaphragm collet?
A diaphragm collet is an elastic clamping element used in matched diaphragm chuck systems for controlled precision clamping and low-deformation workholding.
Is the diaphragm collet the same as the diaphragm collet chuck?
No. The diaphragm collet is a replaceable clamping element and must be used with a matching diaphragm collet chuck unit. It does not provide the full mounting interface or actuation transmission by itself.
How does it relate to diaphragm chuck assemblies?
The diaphragm collet is one part of the complete diaphragm chuck workholding system. Final clamping performance depends on the matching chuck structure, the selected collet size and the workpiece condition.
How do I choose between the external and internal types?
The external type clamps the outside diameter of the workpiece, while the internal type expands in the bore. Selection should be checked against the workpiece datum, diameter range and the matching chuck model.
What workpieces is it suitable for?
It is selected for workpieces that need controlled elastic contact, repeat clamping and low-deformation support within a matching diaphragm chuck system.
How should clamping diameter and wall thickness be confirmed?
The workpiece diameter, tolerance, wall thickness, clamping length and contact surface should be checked together with the matching chuck model before the collet type is finalized.
Can it be customized?
Yes, final matching depends on the workpiece drawing, gripping length and the chuck model. The table notes custom gripping length because the final configuration may be adjusted to the application.
What information is needed for quotation?
Please provide the matching chuck model or spindle interface, workpiece diameter and tolerance, gripping length, clamping surface and material, plus machining load and cycle target.