KORRETTO · CLAMPING HEAD SYSTEMS
Segmented Clamping Head
KORRETTO Segmented Clamping Heads, also called rubber-flex collets, grip the outside of round, square, hexagonal or matched-profile workpieces. Hardened steel segments contact the part directly; vulcanized rubber joins the segments so they can open and close together.
How It Works
The matching chuck moves the clamping head axially against its taper to close the segments around the workpiece. Separated steel segments provide broad, parallel contact while the rubber connection supplies elastic movement. Choose a finished gripping bore for the part, or an EM machinable head for bore-to-size preparation.
Selection should confirm the collet type, code, length, outside diameter, workpiece clamping shape, clamping diameter and matching chuck system.
Key Features
S: smooth bore
For finished surfaces where a smooth gripping face is preferred.
R and RL: grooved bores
R has radial grooves; RL combines radial and longitudinal grooves.
EM: machinable head
Prepare the bore to the required size using the matching turning fixture.
Quick-change tooling
Use a compatible changing tool to install or remove the head.
Typical Applications
- Rubber-flex chuck systems
- Round, square and hex workpieces
- Precision turned parts
- Workpieces requiring reduced clamping marks
- Replacement collet selection
- Stable repeat clamping
Technical Data: Segmented Clamping Head
Use the drawing and parameter table to check type, code, length, outside diameter and clamping range for round, square or hex workpieces.
| Type | Code | L (mm) | D (mm) | d (Round) (mm) | d (Square) (mm) | d (Hex) (mm) |
|---|---|---|---|---|---|---|
| 32 | 32S | 44 | 57.7 | 6–32 | 7–27 | 7–22 |
| 32 | 32R | 44 | 57.7 | 8–32 | 8–27 | 8–22 |
| 32 | 32RL | 44 | 57.7 | 11–32 | — | — |
| 32 | 32EM | 44 | 57.7 | 4–32 | — | — |
| 42 | 42S | 42 | 79.3 | 6–42 | 7–38 | 7–30 |
| 42 | 42R | 42 | 79.3 | 8–42 | 8–38 | 8–30 |
| 42 | 42RL | 42 | 79.3 | 11–42 | — | — |
| 42 | 42EM | 42 | 79.3 | 4–42 | — | — |
| 52 | 52S | 46 | 79.3 | 6–52 | 7–45 | 7–36 |
| 52 | 52R | 46 | 79.3 | 8–52 | 8–45 | 8–36 |
| 52 | 52RL | 46 | 79.3 | 11–52 | — | — |
| 52 | 52EM | 46 | 79.3 | 4–52 | — | — |
| 65 | 65S | 53 | 99.5 | 6–65 | 7–56 | 7–46 |
| 65 | 65R | 53 | 99.5 | 8–65 | 8–56 | 8–46 |
| 65 | 65RL | 53 | 99.5 | 11–65 | — | — |
| 65 | 65EM | 53 | 99.5 | 4–65 | — | — |
| 80 | 80S | 53 | 114.5 | 6–80 | 7–68 | 7–56 |
| 80 | 80R | 53 | 114.5 | 8–80 | 8–68 | 8–46 |
| 80 | 80RL | 53 | 114.5 | 11–80 | — | — |
| 80 | 80EM | 53 | 114.5 | 4–80 | — | — |
| 100 | 100S | 59 | 144.5 | 40–100 | — | — |
| 100 | 100R | 59 | 144.5 | 40–100 | — | — |
| 100 | 100RL | 59 | 144.5 | 40–100 | — | — |
| 100 | 100EM | 59 | 144.5 | 40–100 | — | — |
Download the product datasheet (PDF)
Codes: S = smooth; R = radial grooves; RL = radial and longitudinal grooves; EM = machinable emergency head. An em dash indicates that no square or hex range is specified for that reference.
Clamping Head Technical Guide
For a broader explanation of rubber-bonded segmented construction, clamping-head terminology, working principle, soft-jaw comparison, changeover and supplier selection, read the clamping head and rubber flex collet technical guide.
What to Provide Before Quotation
- Head code and chuck model
- Round diameter or across-flats size and tolerance
- Gripping length, material and surface finish
Related Clamping Head Systems
FAQ
What is the Segmented Clamping Head used for?
KORRETTO Segmented Clamping Heads grip the outside of round, square, hexagonal or matched-profile workpieces. Hardened steel segments contact the part directly; vulcanized rubber joins the segments so they can open and close together.
Is this a complete chuck?
No. It is the replaceable gripping head installed in a matching chuck. The chuck body, actuation connection and workpiece stop are selected separately.
What shapes can it clamp?
Depending on the specification, segmented clamping heads can be selected for round, square, hex or profile workpieces.
How should I select the correct collet?
Confirm the workpiece shape, clamping diameter, tolerance, collet code and compatible chuck model.
Is this the same as an expanding collet?
No. This head closes around the outside of the workpiece. A segmented clamping bushing expands against an internal bore.
What information is needed for selection?
Provide the workpiece drawing, shape, clamping diameter, tolerance, material, matching chuck model and required clamping accuracy.