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The 3M 7000118712 is an open-cell foam muffler insert designed to filter exhaust air, reduce exhaust noise, and prevent excessive tool speed on pneumatic orbital sanders. Sold as a pack, this insert fits directly into the exhaust path of the sander and is a wear item that should be replaced as part of routine tool maintenance. The open-cell foam construction allows adequate airflow while dampening exhaust noise and acting as a governor against over-speed conditions. Two muffler inserts are required per sander installation.
This muffler insert is used on 10,000 RPM orbital sanders where exhaust noise control and speed regulation are part of normal tool operation. It is a common maintenance part for pneumatic tool technicians and shop maintenance personnel working in industrial, manufacturing, and trade environments. Replacing worn or clogged inserts helps maintain consistent tool performance and operator comfort during sustained use.
Designed for use on 10,000 RPM orbital sanders requiring muffler inserts. Two muffler inserts are required per tool. Verify fitment against your specific sander model before ordering.
Pneumatic tool service technicians typically handle muffler insert replacement as part of scheduled maintenance. Disconnect the air supply line completely before disassembling the exhaust path or removing existing inserts. Follow the tool manufacturer's disassembly procedure for accessing the muffler chamber. Install two inserts as required and confirm the exhaust path is unobstructed before reconnecting air supply.
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