High‑Force Pneumatic Chuck with EDM Insulated Base – For Macro‑Style Automation on Sinker EDM

The PA-21039V-TR is a dedicated EDM workholding solution that combines a powerful Macro‑style pneumatic chuck with an integrated dielectric insulated base. The base has a diameter of Ø130mm and an overall height of 99mm, providing robust electrical isolation and ample clearance for EDM setups. You can mount this chuck directly onto the table of any sinker EDM machine without external isolation plates – while enjoying the benefits of pneumatic actuation for fast, repeatable clamping.

The chuck body is machined from high‑grade Japanese stainless steel, hardened to 57–60 HRC, ensuring exceptional wear resistance and long‑term geometric accuracy. Precision‑ground reference surfaces guarantee repeatable seating of all Macro‑style pallets, centering plates, and electrode holders in both 54×54mm and 70×70mm formats.

When connected to a standard 6 bar compressed air supply (operated via air gun), the chuck delivers an impressive 10000 N clamping force through its turbo locking mechanism. This high force securely holds copper or graphite electrodes as well as workpieces, even under aggressive flushing conditions. An integrated air‑blast cleaning system automatically clears debris from the Z‑references each time a pallet is loaded, ensuring consistent positioning accuracy.

Fixed 4×90° index positions enable rapid electrode or workpiece orientation changes without losing reference. The chuck is compatible with Macro‑style automatic spigots (drawbars) such as PA-21004V-TR, and the pneumatic actuation supports quick, hands‑free changeover – ideal for semi‑automated EDM cells or full automation with pallet changers.

The taller insulated base (99mm total height) provides enhanced dielectric isolation distance, reducing stray current leakage and improving EDM process stability. The base is precision ground and drilled for easy mounting onto most EDM machine tables using standard bolts or T‑slot nuts.

Key Benefits:

• EDM‑Ready Insulation: Built‑in dielectric base eliminates external isolation plates.
• High Clamping Force: 10000 N turbo locking ensures stability for EDM operations.
• Pneumatic Operation: Fast, consistent actuation using 6 bar air (air gun).
• Air‑Blast Cleaning: Automatically clears Z‑references for reliable repositioning.
• Full Macro Compatibility: Accepts 54×54mm and 70×70mm Macro‑style pallets.
• 4×90° Indexing: Quick orientation changes for multi‑position EDM jobs.
• Durable Construction: Hardened Japanese stainless steel (57–60 HRC) for long life.
• Taller Design: 99mm overall height offers excellent electrical clearance for demanding EDM processes.

Typical Applications:

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

Compatibility:
The PA-21039V-TR is designed for use with all Macro‑style pallets, centering plates, reference elements, and automatic spigots (e.g., PA-21004V-TR). It fully conforms to the industry‑standard Macro interface. The insulated base is specifically designed for EDM environments; do not use on non‑insulated machines without verifying electrical safety.

Note:
Supply clean, dry compressed air at 6±1 bar. Use the recommended automatic spigot for optimal clamping force. Before installation, clean both the EDM table and the insulated base thoroughly. Periodically inspect the insulation integrity, especially after heavy use. Do not exceed maximum air pressure to avoid damage.

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.