3M 7000120333 Silicon Carbide Abrasive Disc 120 Grit 12in

Product Description

The 3M 7000120333 is a 12-inch silicon carbide plain back abrasive disc designed for surface finishing, grinding, and stock removal on a wide range of materials. Part of the 3M 431Q series, this disc uses silicon carbide abrasive grain, which is well suited for finishing harder materials including ceramics, composites, glass, and non-ferrous metals. At 120 grit, it delivers a medium-fine cut that removes surface defects while leaving a consistent finish. Weighing just 0.07 pounds, the disc is lightweight and easy to handle during extended use. It is installed without adhesive backing, making it compatible with disc pads that use a separate adhesive or hook-and-loop interface layer.

This disc is commonly used in industrial, manufacturing, and finishing environments where flat or orbital disc sanders are in operation. The 120-grit silicon carbide construction makes it a practical choice for finish work on stone, fiberglass, plastics, and non-ferrous metals. It is suited for both production floor applications and skilled trade finishing work where surface consistency matters. The 12-inch diameter accommodates larger-format sanding machines used in floor finishing, panel preparation, and fabrication shops.

Key Features

• Silicon carbide abrasive grain — suited for hard, dense, or non-ferrous materials
• 120 grit for medium-fine stock removal and surface finishing
• 12-inch diameter fits standard large-format disc sanding equipment
• Plain back design — compatible with adhesive-mount or interface-pad setups
• 3M 431Q series construction for consistent grain distribution and cut rate
• Lightweight at 0.07 pounds per disc

Compatibility

Designed as an OEM-style replacement or direct-use abrasive disc for large-format disc sanders and orbital finishing machines that accept 12-inch plain back abrasive discs.

Installation Notes

Installation is performed by finishing tradespeople, fabricators, or floor technicians using standard disc sanding equipment. Before mounting, ensure the sanding machine is fully powered off and the disc pad surface is clean and free of debris or old adhesive. When using a pressure-sensitive adhesive pad, apply the disc firmly and evenly to prevent edge lifting during operation. Always confirm the machine RPM rating does not exceed the disc maximum before use.