Indexing Chuck Manufacturer · Since 2008
Manual & Hydraulic Indexing Chucks —Custom to Φ1200mm
KORRETTO designs and manufactures hydraulic indexing chucks for CNC lathes and manual indexing chucks for lower-volume applications. From standard TK series to fully custom equal-division configurations —free fixture design included.
Looking for TK series specs, full size table, working principle & customer cases?
Why Choose KORRETTO
Indexing Chuck Manufacturer Capabilities
What sets KORRETTO apart from other indexing chuck manufacturers —from design to after-sales support.
Free Fixture Design
No matter how many workpiece varieties –0 or 1000 —KORRETTO provides complete fixture design at no charge when you order the chuck. Our engineers analyze your workpiece drawings and design the optimal jaw/fixture configuration.
Indexing Alarm —All Models Standard
Every TK series chuck includes built-in indexing and clamping alarm signals as standard. CNC integration documentation and ladder diagram support provided at no extra cost. Many competitors charge additional fees for this safety-critical feature.
Full Size Range In-House
TK-168 through TK-1200 —all manufactured in-house. Standard TK-168 to TK-460 kept in stock for fast delivery. Heavy-duty TK-570 to TK-1200 and all custom models produced within 20 days.
Custom Equal-Division Configurations
Standard 6×60° and 8×45° are not the only options. Custom 3, 4, 5, 10, 12-position and unequal-angle indexing available. Provide your workpiece drawing for a custom quote within 2 business days.
1-Year Warranty · Lifetime Support
1-year product warranty on all standard models. Lifetime technical support; after-warranty repairs charged at parts cost only. Replacement parts stocked for all models.
Global Delivery
Ships to North America, Europe, Southeast Asia, and the Middle East. Compatible with major lathe brands: MAZAK, DOOSAN, DMG MORI, HAAS, FANUC-controlled machines, and more.
Selection Guide
Auto Indexing Chuck vs. Manual Indexing Chuck
Choosing between an automatic hydraulic indexing chuck and a manual indexing chuck depends on production volume, machine capability, and workpiece type.
| Comparison Criteria | Auto Hydraulic Indexing Chuck |
Manual Indexing Chuck |
|---|---|---|
| Indexing Method | Automatic —CNC program controlled | Manual —operator rotates & locks |
| Indexing Precision | 0.003° mechanical lock | Depends on operator skill / detent |
| Cycle Time per Index | < 3 seconds (automated) | 20–0 seconds (manual) |
| Unattended / Lights-Out | ✓?Yes —with alarm system | ✓?No —operator required |
| CNC Integration Required | ✓?Yes —hydraulic + signal | ✓?No —any lathe |
| Production Volume | Medium to high volume | Low volume / prototypes |
| Repeatability | ✓?0.03mm —consistent | ~ Variable —operator-dependent |
| Robot / Automation Ready | ✓?Yes | ✓?No |
| KORRETTO Product | TK Series →?View Details | Contact for Manual Options |
For most CNC lathe applications with repetitive multi-face machining, the automatic hydraulic indexing chuck delivers significantly better ROI through reduced cycle time and operator supervision. The manual option suits occasional or prototype work where CNC modification is not practical.
Application Guide
Indexing Chuck Applications —Lathe, Milling & Special
The TK series is optimized for CNC lathes, but indexing solutions apply to multiple machine types and workpiece categories.
The TK series hydraulic indexing chuck mounts to the CNC lathe spindle nose, replacing the standard hydraulic chuck. Ideal for:
- Valve bodies (ball, butterfly, gate, safety valves)
- Cross shafts and universal joint yokes
- Pneumatic/hydraulic manifold blocks
- Fire protection fittings and connectors
A table-mounted or trunnion-type indexing chuck for milling machine enables multi-face milling in a single setup on a VMC or HMC. Applications include:
- Multi-face milling of pre-turned cylindrical parts
- Drilling bolt-hole patterns on flanges
- Milling spanner flats on valve stems
- Index-milling of hexagonal or polygon profiles
TK-570 through TK-1200 heavy-duty indexing chucks handle large industrial workpieces:
- Large gate valves and globe valves (oil & gas)
- Industrial flanges and pipe fittings
- Large pump and compressor housings
- Wind turbine hub components
The cross shaft indexing chuck (4-position, 90° indexing) is one of the most common applications. In one setup, the chuck indexes through all four cross-axis positions to complete drilling and turning of all four arms of a universal joint cross shaft —eliminating 3 re-clamping operations.
- 4-position (90°) standard configuration
- Typical workpiece: universal joint cross shaft, differential spider
- Cycle time reduction: typically 60–0%
Quick Reference
Indexing Chuck Selection Guide by Workpiece
Match your workpiece type and diameter to the recommended TK model and indexing configuration.
| Workpiece Type | Max Diameter (mm) | Recommended Indexing | Recommended Model |
|---|---|---|---|
| Ball valve / butterfly valve body | Up to 130mm | 6×60° or custom | TK-168 / TK-203 |
| Cross shaft / universal joint (small) | Up to 160mm | 4×90° | TK-203 / TK-225 |
| Safety valve / gate valve body | Up to 250mm | 6×60° or 8×45° | TK-256 / TK-305 |
| Flange / manifold block (medium) | Up to 350mm | 6×60° or custom | TK-400 / TK-460 |
| Large valve body (industrial) | Up to 560mm | 6×60° or 4×90° | TK-570 / TK-680 |
| Heavy-duty large valve / turbine part | Up to 1060mm | Custom configuration | TK-850 / TK-1000 / TK-1200 |
| Non-standard / prototype workpiece | Any | Custom equal or unequal divisions | Contact for custom quote |
Custom Solutions
Custom Indexing Chuck —Beyond Standard Configurations
When standard 6-position or 8-position indexing doesn't match your workpiece geometry, KORRETTO manufactures fully custom indexing chucks.
- 1 Non-standard equal divisions: 3-position (120°), 4-position (90°), 5-position (72°), 10-position (36°), 12-position (30°) —specify your required angle and we manufacture to order.
- 2 Unequal-angle indexing: For asymmetric workpieces with non-equal angular features (e.g. 90°, 0°, 120°, 0°). Custom mechanical stop geometry machined to your specifications.
- 3 Special bore or spindle interface: Non-standard spindle nose dimensions, custom D1 bore sizes, or dual-chuck configurations for tandem mounting.
- 4 Pneumatic-hydraulic hybrid: For machines without hydraulic supply —pneumatic actuation with hydraulic pressure intensifier available as an option.
- 5 Oversized beyond TK-1200: Custom heavy-duty indexing chucks beyond Φ1200mm available. Provide workpiece dimensions and machining requirements for engineering assessment.
How to Request a Custom Indexing Chuck
Send us the following information and we'll respond with a technical assessment and indicative price within 2 business days:
—orkpiece drawing or sketch (PDF or DWG)
—equired indexing positions and angles
—aximum workpiece OD and length
—NC lathe model and spindle nose type
—onthly production volume estimate
Custom lead time: approximately 20–0 days after drawing confirmation. Free fixture design included with all custom orders.
FAQ
Indexing Chuck Manufacturer —Frequently Asked Questions
Questions about sourcing, manual vs. auto, milling applications, and custom configurations.
What makes KORRETTO different as an indexing chuck manufacturer?
KORRETTO has manufactured hydraulic indexing chucks since 2008 with over 10,000 units installed worldwide. Key differentiators: (1) Free fixture design for every order regardless of workpiece variety; (2) Indexing alarm standard on all models —many competitors charge extra; (3) Full CNC ladder diagram integration support; (4) In-house manufacturing with quality control; (5) Standard TK-168 to TK-460 stock; custom models in 20 days.
What is a manual indexing chuck and when should I choose it over an automatic one?
A manual indexing chuck requires the operator to manually rotate and lock the workpiece to each indexed position. Choose manual indexing for low-volume production, prototype work, or machines without hydraulic/CNC interface. For medium-to-high volume CNC production, the automatic hydraulic indexing chuck delivers far higher throughput —indexing takes <3 seconds automatically vs 20–0 seconds manually.
Can an indexing chuck be used on a milling machine or machining center?
Yes. While the TK series is primarily designed for CNC lathes, indexing chuck for milling machine applications use a table-mounted or trunnion-mounted indexing fixture on a VMC or HMC. Common uses: multi-face milling, drilling bolt-hole patterns on flanges, milling spanner flats, and indexing hex/polygon profiles. Contact KORRETTO with your machining center model and workpiece for a custom solution.
What custom indexing configurations are available?
Standard TK series offers 6×60° and 8×45° equal-division indexing. Custom options include: 3, 4, 5, 10, 12-position equal divisions; unequal-angle indexing for asymmetric workpieces; special bore or spindle interfaces; pneumatic-hydraulic hybrid actuation; and heavy-duty sizes beyond TK-1200. Send your workpiece drawing for a custom quote within 2 business days.
How many indexing positions can the TK series support?
Standard TK series supports 6-position (60° increments) and 8-position (45° increments). Custom models accommodate 3, 4, 5, 10, 12 or other equal divisions, and unequal-angle indexing (e.g. 90°, 0°, 120°, 0°) with approximately 30-day lead time.
What is the largest indexing chuck you manufacture?
Standard range tops at TK-1200 (1200mm chuck bore, max workpiece 1060mm, clamping force 80kN). For heavy-duty applications such as large industrial valve bodies or turbine flanges, TK-850, TK-1000, and TK-1200 are available from stock or short lead time. Beyond 1200mm, custom oversized indexing chucks are manufactured to order.
Talk to Our Indexing Chuck Engineers
Tell us your workpiece type, diameter, and required indexing positions. We'll recommend the right model, provide free fixture design, and quote within 2 business days.
Request Quote & Fixture Design View TK Series Specs