EDM-Ready Manual Chuck with Built-in Insulated Base for Macro-Style Workholding

The PA-21033V-TR is a complete, ready‑to‑mount manual chuck specifically engineered for Electrical Discharge Machining (EDM). It combines a high‑precision Macro‑style manual chuck with an integrated dielectric insulated base, allowing you to install it directly onto the table of your sinker EDM machine – without sourcing or fabricating separate isolation plates.

By using this chuck, you can immediately leverage the advantages of the Macro workholding system for EDM: quick electrode changes, 4×90° indexing, and repeatable positioning. The integrated base ensures proper electrical isolation, which is critical for stable spark erosion and operator safety, while simplifying your setup and reducing auxiliary costs.

The chuck body is manufactured from high‑grade Japanese stainless steel, hardened to 57–60 HRC, guaranteeing exceptional wear resistance, corrosion protection, and long‑term geometric accuracy. Precision‑ground reference surfaces provide consistent seating of all Macro‑style pallets, centering plates, and electrode holders.

With a locking force of 6000 N, the PA-21033V-TR securely holds both copper and graphite electrodes as well as workpieces, even during heavy flushing conditions. The fixed 4×90° index positions allow rapid electrode orientation changes without losing reference, and the integrated flushing connection supports optimized dielectric fluid flow directly through the chuck.

Designed for convenience, the chuck is compatible with standard Macro‑style manual spigots such as PA-21003V-TR and requires only 6 Nm tightening torque. Its Ø130mm insulated base fits most common EDM machine tables, making it a practical drop‑in solution for shops looking to adopt or expand Macro‑style workholding on their EDM cells.

Key Benefits:

• EDM Plug‑and‑Play: Integrated insulation eliminates separate adapters, saving setup time and cost.
• Full Macro Compatibility: Works seamlessly with existing Macro‑style pallets, electrodes, and centering plates.
• High Clamping Force: 6000 N ensures stability for both roughing and finishing EDM operations.
• Indexing Accuracy: 4×90° fixed positions enable quick, reproducible electrode orientation.
• Flushing Ready: Built‑in connection supports dielectric fluid flow for efficient debris removal.
• Durable Construction: Hardened Japanese stainless steel (57–60 HRC) resists wear and deformation.
• Cost‑Effective: One‑piece solution reduces overall investment compared to assembling separate components.

Typical Applications:

• Direct installation on sinker EDM machines for electrode clamping
• Holding workpieces during mold and die EDM operations
• Retrofitting conventional EDM tables with a Macro‑style interface
• Semi‑automated EDM cells requiring rapid changeover between electrodes and workpieces

Compatibility:
The PA-21033V-TR is designed for use with all Macro‑style pallets, centering plates, reference elements, and manual spigots. It fully conforms to the industry‑standard Macro interface, ensuring interchangeability with existing systems.

Note:
For optimal performance, use the recommended manual spigot PA-21003V-TR (short type with flushing hole) and tighten the drawbar to 6 Nm. Before installation, ensure the EDM table and the insulated base are clean and free of metal chips. Do not exceed the rated clamping force.

Trademark Disclaimer:
Macro® and System 3R® are registered trademarks of their respective owners. Plus Auto Solution is an independent manufacturer. Our products are designed to be interchangeable with systems utilizing Macro‑style interfaces. We are not affiliated with or endorsed by System 3R.