Jergens 21905 Revolving Handwheel Machine Handle 1/2-13

Product Description

The JERGENS 21905 is a revolving handwheel machine handle designed for manual adjustment and positioning on industrial machinery and equipment. The handle features a cylindrical aluminum grip with a carbon steel threaded stem that mounts directly into a tapped hole. The stem thread size is 1/2-13 UNC, the stem length is 0.5 inches, and the handle length is 2.875 inches. The aluminum construction keeps weight low at 0.23 pounds while providing a comfortable grip for repeated hand operation. Machinists, machine builders, and maintenance technicians use this style of handle on jigs, fixtures, and adjustment mechanisms across manufacturing and fabrication environments.

This revolving handwheel handle is suited for light-duty manual control applications on machine tools, fixtures, and industrial equipment where a compact cylindrical grip is required. The revolving handle style allows the operator to spin or rotate the grip freely around the stem axis, reducing hand fatigue during repeated adjustments. Typical installations include clamping levers, feed mechanisms, and panel-mounted adjustment points on production and fabrication machinery.

Key Features

• Revolving cylindrical grip reduces hand fatigue during repeated rotational use
• 1/2-13 UNC threaded stem for direct installation into standard tapped holes
• Aluminum handle body keeps assembly weight low
• Carbon steel stem provides strength at the threaded connection
• Compact 0.5 inch stem length suits shallow mounting bosses
• 2.875 inch handle length delivers adequate torque for hand-tightening tasks

Compatibility

Designed as a standard revolving handwheel machine handle for industrial machinery, fixtures, and equipment with 1/2-13 UNC tapped mounting points.

Installation Notes

Installation is performed by threading the stem directly into a prepared 1/2-13 UNC tapped hole by hand or with a wrench applied to the stem. Ensure the mating tapped hole depth is sufficient for full thread engagement before tightening. Power down and de-energize any associated machinery before performing handle replacement or installation work. Follow applicable machine guarding and workplace safety requirements during service.