3M 7100098194 Psa Disc 400 Grit 6 in Ceramic 100 Pack

Product Description

The 3M 7100098194 is a pressure-sensitive adhesive (PSA) abrasive disc designed for use with disc sanders in surface finishing applications. Part of the 3M 321U series, this disc features a ceramic aluminum oxide abrasive grain on a C-weight paper backing. At 400 grit, it falls in the super fine grade range, making it well suited for finish sanding and light material removal where a smooth surface profile is required. Each package contains 100 discs. The disc measures 6 inches in diameter and does not include vacuum holes. Package weight is 1.03 pounds.

This disc is intended for use with disc sanders in industrial, manufacturing, and trade finishing environments. The PSA backing allows for fast mounting and removal from compatible sanding pads. The 321U series is commonly used in woodworking, metal finishing, and general surface prep applications where a super fine grit is called for in a final or near-final sanding stage. No vacuum holes means this disc is suited for solid backing plates without dust extraction ports.

Key Features

• 400 grit super fine ceramic aluminum oxide abrasive for controlled finish sanding
• PSA backing for quick, tool-free disc changes on compatible sanders
• C-weight paper backing provides flexibility while maintaining abrasive support
• 6-inch diameter fits standard disc sander pads
• No vacuum holes — compatible with solid backing plates
• 100 discs per package for extended shop use

Compatibility

Designed for use with disc sanders compatible with 6-inch PSA abrasive discs and solid (non-perforated) backing pads. Part of the 3M 321U series.

Installation Notes

Installation is performed by trade professionals or skilled operators familiar with disc sanding equipment. Before mounting, ensure the sander is powered off and unplugged. Clean the backing pad surface of any debris or adhesive residue from previous discs before applying the new PSA disc to ensure full contact and proper adhesion. Do not exceed the sander manufacturer's rated RPM for the disc size in use.