3M 7100136779 Hook Loop Abrasive Disc 4.5 in Aluminum Oxide

Product Description

The 3M 7100136779 is a non-woven hook and loop abrasive disc designed for surface conditioning, blending, and finishing applications on metal, wood, and composite materials. Built around aluminum oxide abrasive in a coarse grade, the disc delivers consistent material removal and surface preparation performance. At 4.5 inches in diameter, it mounts via a hook and loop backing system for fast pad changes without tools. Rated to 13,000 RPM, this disc is suited for use with right-angle grinders and random orbital sanders. It belongs to the 3M SE-DH series and carries ACRS certification.

This disc is commonly used by fabricators, welders, and maintenance technicians for weld blending, rust removal, and coarse surface preparation on ferrous and non-ferrous substrates. The non-woven construction provides a conformable, flexible cutting action that follows contours and irregular surfaces without loading as quickly as coated abrasive alternatives. Coarse grade stock removal makes it a first-pass tool in multi-step finishing sequences. Suitable for both bench and field service work in industrial, commercial, and light manufacturing environments.

Key Features

• Aluminum oxide abrasive in coarse grade for aggressive stock removal
• Non-woven construction conforms to curved and irregular surfaces
• Hook and loop backing enables tool-free disc changes on compatible pads
• Rated to 13,000 RPM for use with standard right-angle grinders
• Flexible disc body reduces gouging and chatter on contoured workpieces
• Brown disc color; no vacuum holes, keeping the face fully active

Compatibility

Designed for use with hook and loop backup pads sized for 4.5-inch discs on right-angle grinders and random orbital sanders. Verify pad RPM rating meets or exceeds 13,000 RPM before use.

Installation Notes

Mounting and disc changes should be performed with the tool unplugged or the power source locked out. Press the disc firmly onto the hook and loop backup pad to ensure full engagement before powering the tool. Always confirm the tool and pad assembly RPM rating equals or exceeds the disc maximum of 13,000 RPM. Inspect the disc for tears or damage before each use and discard any disc that shows signs of delamination or core separation.