3M 7000121831 Non-woven Buff and Blend Hs Disc 4 Inch Ao

Product Description

The 3M 7000121831 is a non-woven nylon abrasive disc engineered for light deburring, surface cleaning, and final finishing on metal workpieces. Built on a high-strength open-web nylon construction, this disc maintains stiffness under pressure and resists tearing or fraying when working edges and irregular surfaces. Aluminum oxide mineral provides sharp, consistent cutting action that produces a uniform scratch pattern across ferrous and non-ferrous metals. The 4-inch diameter disc mounts via a 1/2-inch arbor hole and is sold individually. It is used by metalworkers, fabricators, and finishing technicians who need reliable, repeatable surface prep results.

This disc is suited to bench grinder, angle grinder, or right-angle tool applications where controlled light material removal is required. It performs well on cleaning scale, oxidation, and light contaminants from metal surfaces and is appropriate for both shop and field finishing work. The open-web structure limits debris loading, extending disc life in continuous-use production environments. It is part of the Standard Abrasives Buff and Blend HS product line, which is available in Coarse, Medium, and Very Fine grades to match varying surface finish requirements.

Key Features

• High-strength non-woven nylon construction resists tearing, fraying, and folding under high pressure
• Aluminum oxide mineral delivers sharp cutting action and a consistent, smear-free scratch pattern
• Open-web design is load resistant, reducing debris buildup and extending service life
• Performs light deburring and final finishing on ferrous and non-ferrous metals without gouging the substrate
• Available in three grades: Coarse, Medium, and Very Fine for varying degrees of aggressiveness
• Center arbor hole design accommodates standard 1/2-inch arbor mounting

Compatibility

Designed for use with standard bench grinders, angle grinders, and right-angle finishing tools equipped with a 1/2-inch arbor. Suitable for ferrous and non-ferrous metal surface preparation and finishing applications.

Installation Notes

Installation should be performed by a qualified operator following the tool manufacturer's mounting instructions. Ensure the grinder or finishing tool is fully powered down and unplugged before mounting or removing the disc. Verify the tool's maximum RPM rating is compatible with the disc before operation. Always use appropriate personal protective equipment including eye protection and gloves when operating abrasive discs.