Gibraltar 22720.0081 Headless Rolling Ball Clamping Screw M8

Product Description

The GIBRALTAR 22720.0081 is a headless rolling ball end clamping screw designed for precision clamping and fixturing applications in industrial and machining environments. The rolling ball end provides consistent point contact and self-alignment against workpieces, reducing surface marring and improving holding force distribution. This screw features an M8 thread, an overall length of 11.2 millimeters, and a maximum load capacity of 3,272 pounds. Both the screw body and ball are constructed from steel for durability under high-load conditions. It is driven with a 4.0 millimeter hex key. This fastener is typically installed by machinists, toolmakers, and fixture builders working with jigs, vises, and modular fixturing systems.

This clamping screw is suited for use in tooling plates, modular workholding fixtures, vise jaws, and other precision clamping assemblies found in machine shops and manufacturing cells. The headless profile allows the screw to sit flush or below the surface of the component, making it practical in low-clearance clamping setups. The rolling ball tip accommodates slight angular misalignment between the screw axis and the clamped surface, which is a common requirement in adjustable fixture designs.

Key Features

• Headless design allows flush or sub-flush installation in tight-clearance fixturing applications
• Rolling ball end provides self-aligning point contact to reduce workpiece marring
• M8 thread size for compatibility with standard metric fixturing components
• 3,272 pound maximum load capacity suits demanding workholding applications
• 5.5 millimeter ball diameter for consistent contact area
• Driven with a 4.0 millimeter hex key — no special tooling required

Compatibility

Designed as a standard metric M8 headless rolling ball end clamping screw for use in modular fixturing systems, tooling plates, and precision workholding assemblies that accept M8 threaded clamping elements.

Installation Notes

Installation is performed by machinists or toolmakers using a 4.0 millimeter hex key. Ensure the receiving threaded bore is clean and free of debris before threading in the screw. Do not exceed the rated maximum load capacity of 3,272 pounds. Verify thread engagement depth is adequate for the applied clamping load before putting the fixture into service.