N42 Adhesive-Backed Block Magnet 4 × 1 × 1/8 in – SKU 9181

This N42 neodymium block magnet measures 4 × 1 × 1/8 inch and includes 3M adhesive on one side. It is magnetized through the 1/8-inch thickness and finished with Ni-Cu-Ni plating.

N42 Adhesive-Backed Block Magnet Specifications

Design Notes

Through-thickness magnetization places the north and south poles on the broad 4 × 1-inch faces. The listed surface field is 3,527.42 gauss, with a listed pull force of 69.84 lb under the stated test conditions. Do not expose this standard-temperature neodymium magnet to temperatures above 80°C (176°F).

The adhesive backing can simplify placement on a clean, compatible surface, but adhesive bond strength and magnetic pull are separate limits. Verify the adhesive system with the actual substrate, surface preparation, loading direction and operating temperature. The listed magnet temperature rating does not establish an adhesive temperature rating.

Air gaps, thin target steel, misalignment and shear loading can reduce holding force. Treat 69.84 lb as a comparison value rather than a safe working load. Support the long, thin block during installation to avoid bending or chipping, and test the complete mounting arrangement before production.

Compare magnetic strength and temperature classes in our neodymium grades chart. Explore gap effects using the pull-force calculator, or send your drawing, operating conditions and volume through the Magnet RFQ Builder.

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