High‑Force Pneumatic Chuck with CNC Base – For Macro‑Style Workholding Automation

The PA-21038V-TR is a powerful pneumatic chuck designed for Macro‑style pallets (54×54mm and 70×70mm), pre‑assembled on a precision CNC base plate (145×100mm footprint). This combination allows you to mount the chuck directly onto CNC machine tables, tombstones, or fixtures using standard T‑slot nuts or bolt holes – no additional adapters required.

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 ensures secure holding of heavy workpieces, large electrodes, and pallets even during aggressive milling or high‑speed machining operations.

The chuck features precision‑ground reference surfaces made from high‑grade Japanese stainless steel, hardened to 57–60 HRC, guaranteeing long‑term accuracy and resistance to wear. An integrated air‑blast cleaning system automatically cleans the Z‑reference surfaces each time a pallet is loaded, eliminating debris that could affect positioning accuracy.

Fixed 4×90° index positions enable rapid workpiece or electrode 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 both manual intervention in semi‑automated cells and full automation with pallet changers or robots.

Key Benefits:

• High Clamping Force: 10000 N turbo locking ensures rigidity for heavy cuts.
• Pneumatic Operation: Fast, consistent actuation using standard 6 bar air (air gun).
• Integrated Air‑Blast Cleaning: Automatically clears Z‑references for reliable repositioning.
• Ready‑to‑Install: Pre‑attached CNC base plate (145×100mm) fits most machine tables.
• Full Macro Compatibility: Accepts 54×54mm and 70×70mm Macro‑style pallets.
• Indexing Capability: 4×90° fixed positions for quick orientation.
• Durable Construction: Hardened Japanese stainless steel (57–60 HRC) for long service life.
• Automation Ready: Can be integrated into pallet changing systems or robotic cells.

Typical Applications:

• Automated workholding on CNC milling centers and machining centers
• Quick changeover for high‑mix, low‑volume production
• Electrode and workpiece clamping in mold making
• Retrofitting existing machines with pneumatic Macro‑style workholding

Compatibility:
The PA-21038V-TR is designed for use with all Macro‑style pallets, centering plates, reference elements, and automatic spigots (drawbars) such as PA-21004V-TR. It conforms to the industry‑standard Macro interface.

Note:
Supply clean, dry compressed air at 6±1 bar. Use the recommended automatic spigot for optimal clamping force. Periodically check the air filter and lubricator (if installed). Do not exceed maximum air pressure to avoid damage. Ensure the base plate is securely mounted to the machine table before operation.

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.