Eclipse E821 Alnico Button Magnet 0.5 in 1.5 Lb Pull

Product Description

The ECLIPSE E821 is a Grade 5 Alnico button magnet designed for precision holding, sensing, and positioning applications in industrial and trade environments. Built from Alnico 5 material, it delivers a maximum pull force of 1.5 pounds (0.7 kg) from a compact 0.5-inch diameter form factor. The magnet measures 0.375 inches high with an 11/64-inch center hole and a 9/32-inch gap width, making it well suited for mounting in fixtures, jigs, sensors, and custom assemblies. Licensed electricians, instrumentation techs, and mechanical tradespeople commonly specify Alnico button magnets where stable magnetic output across a wide temperature range is required.

The E821 fits applications where a small, permanently magnetized component must retain consistent field strength under elevated temperatures. Grade 5 Alnico material maintains magnetic properties up to 550 degrees C, making it appropriate for high-heat industrial environments such as furnace sensor assemblies, motor components, and instrumentation fixtures. It is sold and packaged as a single unit, suitable for prototyping, replacement, or low-volume production work.

Key Features

• Maximum pull force of 1.5 lb (0.7 kg) from a 0.5-inch diameter body
• Grade 5 Alnico (Alnico 5) construction for stable, permanent magnetism
• Maximum operating temperature of 550 degrees C
• Center mounting hole at 11/64-inch diameter for easy integration into assemblies
• Compact profile: 0.5 inches diameter, 0.375 inches high, 9/32-inch gap width

Compatibility

Designed as an OEM-style replacement or direct-use Alnico button magnet for industrial fixtures, instrumentation, and mechanical assemblies requiring a Grade 5 Alnico permanent magnet in a 0.5-inch diameter button form.

Installation Notes

Installation is typically performed by instrumentation technicians or mechanical assemblers. Ensure the mating surface is clean and free of ferrous debris before seating the magnet, as Alnico magnets are brittle and can chip if struck against hard surfaces. Do not attempt to re-magnetize or demagnetize this component without appropriate equipment. When mounting via the center hole, use hardware sized for an 11/64-inch bore and avoid over-torquing, which can crack the magnet body.