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The 3M 7010365046 Microfinishing Film Belt 372L is a coated abrasive belt engineered for precision finishing on composites, plastics, fiberglass, and metal surfaces. It uses micron-graded aluminum oxide abrasive bonded to a durable polyester film backing, delivering a fast cut rate and a consistent, fine surface finish. The closed-coat construction maximizes grain density across the belt face. Resin bonding resists heat-related deterioration, extending usable belt life in demanding finishing applications. Measuring 36 inches in length and 2 inches in width, this belt is suited for production and detail finishing work performed by machinists, fabricators, and surface finishing technicians.
This belt is intended for use on belt grinding and finishing machines in shop and production environments. It performs on a range of substrate materials including composites, fiberglass, plastic, and metal. The polyester film backing provides dimensional stability and flexibility, making it suitable for both flat and contoured surface work. Typical applications include precision deburring, final surface preparation, and microfinishing operations where a uniform, repeatable finish is required across multiple workpieces.
Designed for use on belt finishing and microfinishing machines that accept 36-inch by 2-inch abrasive belts. Verify machine belt specifications before installation.
Installation should be performed by a qualified machine operator or finishing technician. Power down and lock out the belt finishing machine before mounting or removing abrasive belts. Confirm belt tracking and tension according to the equipment manufacturer guidelines before resuming operation. Inspect the belt for tears or edge damage prior to each use.
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