Hydraulic Indexing Chucks

1. Definition: An indexing chuck is a spindle-mounted workholding device that combines workpiece clamping with automatic angular indexing.
2. Core function: A standard chuck mainly clamps the workpiece, while an indexing chuck can rotate it to the next programmed angle after a single setup and continue the machining sequence.
3. Application value: KORRETTO hydraulic indexing chucks use standard indexing formats such as 8 × 45° and 6 × 60°.
4. Application value: For parts with intersecting axes, multiple interface directions or multiple angular machining faces, this can reduce repeated removal, re-clamping and re-alignment while helping maintain concentricity, angular relationships and positional consistency between machining positions.

Indexing chucks suit workpieces with ports, journals, bosses or machining faces at defined angles that would otherwise require repeated turning, re-clamping and re-alignment. Typical examples include multi-port valve bodies, hydraulic or pneumatic manifolds, cross shafts, universal-joint components, pipe fittings and other parts whose machined features must maintain angular relationships.

1. High positioning repeatability: KORRETTO indexing chucks use precision manufacturing and a rigid locating structure. AC / SC standard-series data specify 1 arc-minute indexing accuracy and repeatability below 0.01 mm.
2. Fully sealed construction: The chuck body uses a fully sealed design that helps isolate chips, coolant and dust and reduces the risk of contaminants entering the internal mechanism.
3. More usable internal space: Finite element analysis is used during chuck design to optimize internal space while maintaining body rigidity and load performance, leaving more clearance for workpieces, fixtures and tools.
4. Higher permissible speed: Different series and sizes have their own maximum permissible speeds. For example, SC-G145A/C can reach up to 4000 rpm. Actual operating speed must be confirmed for the specific model and machining conditions.
5. Lightweight design: Structural optimization reduces the weight of the new-generation KORRETTO indexing chuck by approximately 13% on average, helping reduce additional spindle load and support acceleration and automation.
6. Simplified installation: Modular construction and retractable hydraulic connections make installation and commissioning of the chuck, connection rod, rotary oil distributor and detector module more direct, helping reduce piping, changeover and commissioning work on site.
7. Optional retractable locating mechanism: For workpieces without a reliable locating face, or where the locating position may interfere with the machining area, a retractable locating mechanism can be configured. It extends for loading and locating, then retracts during machining to provide clearance for the tool and rotating workpiece.

1. Common equipment: The most common application is a CNC lathe or CNC turning center because the indexing chuck can coordinate with the CNC program, hydraulic system and I/O signals for clamping, indexing and the machining cycle.
2. Other equipment: Depending on the machine structure and controls, installation can also be evaluated for a conventional or manual lathe, CNC milling machine, machining center, CNC drilling machine, special-purpose machine, automated production line or robotic machining cell.
3. Installation conditions: The final installation decision depends on the spindle nose, available installation space, hydraulic configuration, rotary oil distributor arrangement, machine control and I/O, required speed and workpiece rotation envelope.

Yes. The indexing chuck remains the spindle-mounted indexing platform, while a matched expanding mandrel or internal-expansion fixture locates and clamps the workpiece bore. Confirm whether the bore is blind or through, the usable clamping depth, the workpiece wall thickness, the expansion range and the available fixture and rotation space.

1. Product status: KORRETTO has developed a next-generation Electric Indexing Chuck.
2. Installation method: The design uses a built-in battery and does not require an external rotary power-supply line, further simplifying installation.
3. Control capability: After mechanical mounting and tightening, the system can be configured, and a supporting app can be used to adjust chuck operating parameters.
4. Series boundary: The electric indexing chuck supports arbitrary angular indexing through 360°, adjustable clamping force, status monitoring and parameter setting.
5. Series boundary: SC, AC, FAC and LC are current hydraulic series, so their hydraulic-series data must not be transferred directly to the next-generation electric product.

Check the full workpiece and fixture rotation envelope, not the workpiece diameter alone. First confirm 2G > Q on the page drawing. Then calculate N − n and M − m: the selector treats at least 30 mm as the primary clearance match and more than 15 mm as a compact alternative. These are screening rules for this selector, not universal safe operating clearances. Confirm the final model from the drawing, complete rotation path, tool and turret interference, clamping force, stroke, spindle interface, speed and fixture concept.

1. Initial assessment: Many existing lathes can be retrofitted, but checking the chuck diameter alone is not sufficient.
2. Mechanical and hydraulic conditions: Verify the spindle nose, spindle bore and installation space, chuck weight and spindle load, rotary oil distributor location, hydraulic station and circuit, connection rod or drawbar, CNC I/O, indexing control signals, guarding and turret interference.
3. Control and safety conditions: A conventional lathe may also be possible, but the automatic indexing control method must be designed around the existing electrical and hydraulic system.

1. Model data: Each model has its own permissible maximum speed and maximum clamping force, so selection should follow the applicable model data.
2. Actual load: Actual machining also depends on workpiece weight, fixture weight, center of gravity, indexing mechanism inertia, cutting load, workpiece projection and actual clamping area.
3. Combined review: Do not run continuously based only on the chuck nameplate maximum clamping force or maximum speed.
4. Combined review: During project selection, review Max Speed, Max Clamping Force, Stroke, Workpiece Size and Fixture Configuration together.

1. Structural suitability: Yes.
2. Automation sequence: The FAC series front-opening design is particularly suitable for robot loading and unloading because it provides more operating space at the front.
3. Implementation checks: An automation system can coordinate Robot loading, Workpiece positioning, Clamping, Indexing, Position confirmation, Machining, Unclamping and Robot unloading.
4. Implementation checks: Before implementation, confirm the robot approach direction, workpiece orientation, fixture opening, tool clearance, CNC / PLC / I/O signals and safety interlocks.

1. Detection function: KORRETTO can be configured with indexing-position detection and jam-alarm functions.
2. Position confirmation: The detection system can confirm whether the locating rod reaches the specified position for 45° / 60° or 90° / 120° indexing, as applicable.
3. Fault interlock: If the position is not reached, the sensor remains OFF, the detector outputs an alarm, the machine cycle is stopped and machining does not continue.
4. Fault interlock: Confirm the detailed configuration against the indexing detection and jam-alarm module, machine logic and project I/O scheme.

1. Quick-change interface: KORRETTO uses a plug-in quick-change fixture interface.
2. Reference time: Standard SC / AC data indicate approximately 1 minute for fixture changeover, while FAC / LC data indicate approximately 2 minutes.
3. Fixture configuration: Actual time depends on fixture complexity, workpiece locating, hydraulic connection and inspection requirements.
4. Fixture configuration: Fixtures can be designed as independent inserts or fixtures for different workpieces, with the final changeover procedure confirmed for the site operation.

1. Sealing function: A fully sealed construction helps reduce the entry of chips, coolant and dust into the internal mechanism, but the equipment should still be checked according to the operating manual.
2. Routine checks: Typical checks include hydraulic oil condition, operating pressure, oil leakage, fixture fasteners, positioning components, detector operation, rotary oil distributor condition, abnormal noise and indexing movement.
3. Maintenance interval: Do not assume a fixed maintenance interval; determine the interval from working hours, coolant environment, chip load, speed and production cycle.

1. Information item 1: a 2D workpiece drawing
2. Information item 2: a 3D workpiece model
3. Information item 3: workpiece material
4. Information item 4: workpiece weight
5. Information item 5: blank condition
6. Information item 6: the clamping locations
7. Information item 7: the machining locations
8. Information item 8: the angular relationships between machining faces
9. Information item 9: required indexing angles
10. Information item 10: basic cutting-tool information
11. Information item 11: CNC machine model
12. Information item 12: spindle nose
13. Information item 13: maximum spindle speed in use
14. Information item 14: the existing hydraulic system
15. Information item 15: whether robot loading and unloading is required
16. Information item 16: target cycle time
17. Information item 17: whether indexing-position detection is required