3M 7000118878 Psa Cloth Sanding Disc 40 Grit 3 Inch

Product Description

The 3M 7000118878 is a pressure-sensitive adhesive (PSA) cloth sanding disc designed for heavy-duty material removal in grinding and finishing applications. Built on an X-weight cloth backing, this 3-inch disc handles aggressive stock removal without tearing or edge breakdown. The aluminum oxide abrasive cuts fast and delivers consistent performance across a wide range of surfaces. A resin bond system locks the abrasive in place and dissipates heat to extend disc life. The PSA backing adheres firmly to a backup pad or steel platen and releases cleanly for fast changeovers. Suitable for both wet and dry use.

This disc is intended for metalworking, woodworking, and composite finishing tasks where aggressive material removal is required. At 40 grit, it is well suited for initial stock removal, weld blending, and surface preparation before finer finishing steps. The 3-inch diameter fits standard PSA backup pads and steel platens used on random orbital sanders and disc grinders. The 10000 RPM maximum speed rating accommodates most right-angle and in-line pneumatic and electric tools running at that speed or below. Professional fabricators, welders, and finishing tradespeople are the primary users.

Key Features

• Pressure-sensitive adhesive backing adheres to backup pads or steel platens and releases cleanly for fast disc changes
• X-weight cloth backing resists tearing and edge wear under aggressive load
• Aluminum oxide abrasive provides fast cut rate and long service life across multiple surface types
• Resin bond construction protects abrasive layer from heat damage to extend disc life
• Rated for wet and dry applications
• Maximum operating speed of 10000 RPM

Compatibility

Designed as an OEM-style PSA replacement disc for use with standard 3-inch backup pads and steel platens on pneumatic and electric disc grinders and random orbital sanders rated up to 10000 RPM.

Installation Notes

Installation should be performed by trained personnel familiar with abrasive tooling and the equipment being used. Before mounting, confirm the tool spindle speed does not exceed the disc maximum speed rating of 10000 RPM. Press the PSA backing firmly onto a clean, dry backup pad or steel platen to ensure full adhesion before operation. Inspect the disc for damage before each use and discard any disc that shows tears, cuts, or delamination.

Technical Specifications

• Abrasive Type: Aluminum Oxide
• Grit: 40
• Disc Diameter: 3 inches
• Maximum Speed: 10000 RPM
• Backing Type: X-weight Cloth
• Attachment Method: Pressure-Sensitive Adhesive (PSA)
• Bond Type: Resin
• Wet/Dry Rated: Yes
• Weight: 0.02 pounds
• Package Dimensions: 6.88 x 6.88 x 5.88 inches
• Sold As: Each
• UPC: 00051144013357

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000118878