KORRETTO · CLAMPING HEAD SYSTEMS
Segmented Clamping Bushing for Through-Hole Clamping
The Segmented Clamping Bushing for Through-Hole Clamping (SB1 series) is a replaceable internal-gripping element for a matching Through-Hole Segmented Mandrel System. Its steel segments expand against an open-through bore, leaving the outside of the workpiece accessible for turning or finishing.
How It Works
A matched mandrel operates the segmented bushing from inside the bore. The steel segments supply the gripping contact and vulcanized rubber connects them for expansion and release. Confirm the bushing code and mandrel connection rather than choosing from bore diameter alone.
Selection should confirm the expansion range, bore tolerance, maximum length, workpiece material, support length and whether the application requires the collet body only or the complete chuck assembly.
Key Features
Open-through bores
For sleeves, rings and other bore-located workpieces.
SB100-SB170 sizes
Compare all eight catalog sizes and their gripping lengths.
Replaceable gripping element
Fit the bushing to a compatible through-hole mandrel.
External machining access
Internal gripping keeps the outside surface available.
Typical Applications
- Through-hole workpieces
- Bore-located components
- Internal expansion clamping
- Parts requiring outside-surface machining
- Replacement expanding collet selection
Technical Data: Segmented Clamping Bushing for Through-Hole Clamping
Use the parameter table to check model, expansion range, recommended workpiece tolerance and maximum length.
| Model | Clamping range (mm) | Recommended workpiece tolerance (mm) | Maximum length (mm) | Size increment (mm) |
|---|---|---|---|---|
| SB100 | 20–28 | ±0.25 | 22 | 0.5 |
| SB110 | 26–38 | ±0.25 | 26 | 0.5 |
| SB120 | 36–54 | ±0.25 | 43 | 0.5 |
| SB130 | 50–80 | ±0.35 | 49 | 0.5 |
| SB140 | 69–100 | ±0.4 | 59 | 0.5 |
| SB140 | 101–120 | ±0.4 | 59 | 1 |
| SB150 | 100–130 | ±0.5 | 86 | 1 |
| SB160 | 130–160 | ±0.5 | 96 | 1 |
| SB170 | 160–200 | ±0.5 | 94 | 1 |
Download the product datasheet (PDF)
The SB140 bushing for 101–120 mm bores has a maximum permissible speed of 4200 rpm. Select the operating speed within the limits of both the bushing and the complete mandrel setup.
The size increment is the catalog "By" value. It describes available size steps, not the expansion stroke of an individual bushing.
What to Provide Before Quotation
- SB1 bushing code and mandrel model
- Bore range, tolerance and required support length
- Workpiece wall thickness, material and machining area
Related Clamping Head Systems
FAQ
What is the Segmented Clamping Bushing for Through-Hole Clamping used for?
The Segmented Clamping Bushing for Through-Hole Clamping (SB1 series) is a replaceable internal-gripping element for a matching Through-Hole Segmented Mandrel System. Its steel segments expand against an open-through bore, leaving the outside of the workpiece accessible for turning or finishing.
Is this a complete chuck?
No. It is a replaceable segmented clamping bushing. It must be installed on the corresponding expanding mandrel with the correct connection and locating components.
How is this different from the blind-hole version?
This version is for open-through bores. The blind-hole version is for blind-hole or semi-through-hole workpieces.
What should be checked before selection?
Check bore diameter, expansion range, tolerance, maximum length, support length and matching chuck or actuator structure.
Can this be used for outside machining?
Yes. Internal expansion clamping can leave the outside surface available for machining.
What information should I provide?
Provide the workpiece drawing, bore size, tolerance, material, support length, maximum length and whether the complete chuck assembly is required.