Indexing Chuck Selection Guide
Use this guide when deciding whether the process needs a spindle-side indexing chuck or a table-side rotary table.
Spindle-side indexing chuck solutions for angular positioning and multi-angle machining.
Indexing Chucks
KORRETTO indexing chucks are used when the workpiece needs angular positioning through the chuck itself instead of a table-side rotary unit. They are suitable for CNC lathe applications, combined turning and milling, repeated angular positioning and custom workholding systems where the chuck body or clamping unit must index between machining steps.
Hydraulic Indexing Chuck
Used when hydraulic clamping and controlled angular positioning are required in one chuck system.
Automatic Indexing Chuck
Used when the clamping and indexing sequence needs to be integrated into a repeat production process.
Quick Selection Table
| Requirement | Start with |
|---|---|
| Spindle-side angular positioning | Indexing Chuck |
| Hydraulic clamping with indexing | Hydraulic Indexing Chuck |
| Automated indexing sequence | Automatic Indexing Chuck |
| Table-side rotary positioning | Rotary Table / Dividing Head |
| Multi-angle machining on lathe | Indexing Chuck |
| Multi-face milling on machining center | Rotary Table / 4th Axis Rotary Table |
How to Select an Indexing Chuck
- Confirm whether indexing happens at the spindle or table
Indexing chucks are spindle-side workholding products. Rotary tables and dividing heads are table-side products. - Define the indexing angle and sequence
Provide the number of positions, angle requirements and whether indexing is manual, hydraulic or automatic. - Check clamping method
The chuck may use hydraulic clamping, expansion sleeves or a custom clamping structure depending on the workpiece. - Review accuracy and repeatability
Indexing accuracy, repeatability and locking method should match the machining process. - Confirm machine interface
Provide spindle nose, drawbar or hydraulic interface, machine model and workpiece drawing before selection.
FAQ
What is an indexing chuck?
An indexing chuck is a chuck or workholding unit that can rotate the workpiece to repeat angular positions from the spindle side.
How is an indexing chuck different from a rotary table?
An indexing chuck is mounted on the spindle side and indexes the chuck or workpiece. A rotary table is mounted on the machine table and positions the fixture or workpiece from the table side.
When should I use a hydraulic indexing chuck?
Use a hydraulic indexing chuck when hydraulic clamping and angular indexing are both required during the machining cycle.
Is auto indexing chuck the same as hydraulic indexing chuck?
Not always. Hydraulic indexing refers to the actuation method. Automatic indexing refers to the indexing sequence or mechanism. The actual design depends on the project.
What information is required for selection?
Send the workpiece drawing, indexing angles, number of stations, machine model, spindle nose, clamping method and required accuracy.