Merit Abrasives 08834171175 Psa Disc 3 in 40 Grit

Product Description

The MERIT ABRASIVES 08834171175 is a 3-inch pressure-sensitive adhesive (PSA) abrasive disc designed for aggressive material removal on metal, wood, and composite surfaces. Built with aluminum oxide abrasive on a flexible cloth backing, this disc delivers consistent stock removal at 40 grit, a coarse grade suited for grinding welds, shaping edges, and removing surface coatings. The PSA mount allows fast disc swaps on compatible 3-inch backup pads without the need for additional fasteners. Metalworkers, fabricators, and finish carpenters reach for this disc when initial material removal is the priority.

This disc is suited for use on angle grinders, random orbital sanders, and drill-mounted backup pads that accept 3-inch PSA discs. The 40-grit coarse grade makes it a first-stage disc in multi-step finishing workflows, particularly for weld grinding, rust removal, and surface preparation ahead of finer grits. The flexible cloth backing conforms slightly to curved or irregular workpiece profiles, making it practical for contoured stock. No vacuum holes are present, so this disc is intended for open-face sanding without dust-collection port alignment requirements.

Key Features

• 3-inch diameter PSA disc for quick, adhesive-backed mounting on compatible backup pads
• 40-grit aluminum oxide abrasive for aggressive coarse-grade stock removal
• Flexible cloth backing conforms to contoured and irregular surfaces
• No vacuum holes — designed for standard open-face grinding and sanding applications
• Black disc color for easy grit identification on the shop floor

Compatibility

Designed as a direct-mount replacement for 3-inch PSA abrasive discs used on angle grinders, drill pads, and orbital sanding tools that accept pressure-sensitive adhesive backed discs with no vacuum holes.

Installation Notes

Installation is performed by trades workers and fabricators requiring no special licensing. Ensure the backup pad surface is clean and free of adhesive residue before mounting to achieve full PSA contact. Power down and disconnect the tool from its power source before swapping discs. Do not exceed the RPM rating of the backup pad or tool when operating this disc.