Vacuum Workholding Systems for Precision Applications

Vacuum workholding uses negative pressure to hold a workpiece flat against a fixture or table. A vacuum pump removes air from beneath the part, creating a pressure differential that presses the part firmly into place. This method is especially effective for non-ferrous materials, composites, plastics, and thin metals that are prone to bending or marring under mechanical clamping. 

Welch Vacuum systems are designed to integrate easily into CNC machines, routers, and inspection setups. Their pumps and accessories support consistent hold force, fast cycle times, and low maintenance. 

A typical vacuum workholding setup includes: 

• Vacuum pump: Generates the negative pressure. Welch offers oil-free and oil-sealed options depending on application needs. 

• Vacuum table or chuck: The surface that interfaces with the part. Often includes grooves or porous materials to distribute vacuum evenly. 

• Control valves and gauges: Regulate and monitor vacuum levels. 

• Filters and traps: Protect the pump from debris or fluids. 

Welch’s modular systems allow customization for part size, material, and machining environment.