Merit Abrasives 08834171193 Psa Sanding Disc 4 in 80 Grit

Product Description

The MERIT ABRASIVES 08834171193 is a pressure-sensitive adhesive (PSA) sanding disc designed for fast, secure mounting on PSA-compatible backup pads and random orbital or disc sanders. Built with aluminum oxide abrasive on a flexible cloth backing, this 4-inch disc delivers consistent stock removal across metal, wood, and composite surfaces. At 80 grit, it falls in the medium range, making it well-suited for initial surface preparation, weld blending, rust removal, and aggressive material shaping before moving to finer finishing grits. The black cloth backing provides durability and flexibility, allowing the disc to conform to slightly contoured workpieces without tearing under load.

This disc is used in fabrication shops, maintenance facilities, and general metalworking environments where a reliable, repositionable sanding disc is needed. The PSA adhesive backing allows quick disc changes on properly prepared backup pads. At 4 inches in diameter, it is a common size for smaller angle grinders and dedicated disc sanders used by machinists, welders, pipefitters, and general maintenance technicians. No vacuum holes are included, making it appropriate for use on solid (non-perforated) backup pads.

Key Features

• 4-inch diameter fits standard PSA backup pads for disc sanders and angle grinders
• 80-grit aluminum oxide abrasive provides medium-grade cutting action for surface prep and stock removal
• Flexible cloth backing conforms to contoured surfaces and resists tearing
• Pressure-sensitive adhesive mounting allows fast disc changes without tools
• No vacuum holes — designed for solid, non-perforated backup pads
• Black disc color; sold individually

Compatibility

Designed for use with PSA-style backup pads accepting 4-inch sanding discs. No vacuum hole pattern, so it is not compatible with dust-collection backup pads that require perforated discs.

Installation Notes

Ensure the backup pad surface is clean and free of adhesive residue before applying the disc, as contamination reduces bonding strength. Press the disc firmly and evenly onto the pad before beginning operation. Inspect the disc for tears or separation before each use and replace immediately if damage is found. Follow applicable shop safety practices, including use of appropriate eye protection and guarding, when operating disc sanders or angle grinders.