Precision Macro-Style Automatic Spigot for Automated Workholding

The PA-21004V-TR is a high-quality automatic spigot (drawbar) designed for Macro-style pneumatic or automatic clamping systems. It serves as the critical connecting element between centering plates, pallets, or reference elements and the automatic chuck, enabling secure locking, repeatable positioning, and seamless integration into automated machining cells.

Manufactured from hardened stainless steel (HRC 48–52) , this spigot offers exceptional wear resistance and dimensional stability under repeated clamping cycles—essential for high-volume production environments. The precision-ground surfaces ensure consistent engagement and reliable locking force when used with pneumatic chucks.

A key feature of this spigot is the integrated Ø7mm flushing hole, which allows coolant, compressed air, or EDM dielectric fluid to pass through the assembly. This is particularly valuable in EDM applications where efficient flushing is critical for optimal machining performance and surface finish.

Key Benefits:

• Automation Ready: Designed for use with pneumatic automatic chucks, enabling robotic or pallet-changing operations.

• Flushing Capability: Ø7mm through-hole enables fluid or air passage, supporting EDM and machining operations.

• Durable Construction: Hardened stainless steel withstands wear and maintains accuracy over long-term use.

• Extended Length: Long type design provides proper engagement depth for automatic chucks.

• Complete Assembly: Supplied with all necessary plastic components for easy installation.

• Cost-Effective: A practical alternative for expanding or maintaining existing Macro-style automatic systems.

Typical Applications:

• Securing centering plates or pallets in Macro-style automatic (pneumatic) chucks

• Automated pallet changing systems in milling, EDM, and grinding cells

• EDM electrode and workpiece mounting requiring through-fluid flushing

• High-volume production environments requiring reliable, repeatable clamping

Compatibility: The PA-21004V-TR is designed for use with automatic chucks and clamping systems utilizing the industry-standard Macro-style interface. It is intended as a direct replacement for spigots used in such systems.

Note: This spigot is the long type version for automatic chucks. For manual chuck applications, please refer to the short type version (PA-21003V-TR). Always verify compatibility with your specific chuck model before installation.