4-1/2″ x 7/8″ Aluminum Oxide Resin Fiber Discs Mercer 36 Grit 25 Pack

Description

Product Overview

The Mercer 4-1/2″ x 7/8″ aluminum oxide resin fiber discs are engineered to provide reliable, high‑performance sanding across a broad range of materials. Each disc features a 36‑grit aluminum oxide abrasive, a material known for its balance of durability and cutting efficiency. The resin‑bonded construction ensures that the abrasive grains stay firmly attached even under demanding conditions, while the vulcanized fiber backing offers exceptional strength and resistance to delamination. Packaged in a convenient 25‑disc box, these discs are sized to fit standard angle grinders with a 7/8″ arbor, delivering a consistent cutting diameter of 4.5 inches. The product is designed for a maximum rotational speed of 13,300 RPM, making it suitable for both light‑duty polishing and heavy‑duty grinding tasks.

Usage

These discs excel in a variety of applications, from metal fabrication workshops to woodworking shops and even hobbyist projects involving fiberglass, plastics, and composite materials. The 36‑grit grade is ideal for rapid material removal, surface preparation, and shaping of rough edges before moving on to finer finishes. Because the discs are compatible with standard angle grinders, they can be used on job sites, in garages, or in professional workshops where portability and ease of change‑out are essential. The heavy‑duty fiber backing tolerates the high heat generated during grinding, reducing the risk of disc warping or premature wear. Users should always pair the discs with a suitable backing pad to maximize safety and performance, especially when operating at the upper limits of the grinder’s speed range.

Why Choose Us

Choosing Mercer means selecting a brand with a long history of delivering reliable power‑tool accessories. Each disc undergoes rigorous quality control to ensure uniform grit distribution and consistent bonding strength. The 90‑day warranty against manufacturer defects underscores our confidence in the product’s durability. Additionally, the resin‑bonded aluminum oxide grains are formulated to maintain sharpness longer than standard abrasive materials, translating into fewer disc changes and lower overall operating costs. Our commitment to customer satisfaction includes responsive technical support and clear guidance on proper disc usage, ensuring that you achieve the best possible results on every project.

Key Features

• Consistent 36‑grit aluminum oxide provides fast, efficient material removal.
• Resin‑bonded abrasive grains stay firmly attached for longer life.
• Heavy‑duty vulcanized fiber backing resists heat and wear during high‑speed grinding.
• Fits standard 7/8″ arbor angle grinders up to 13,300 RPM for versatile use.
• Backed by a 90‑day warranty and dedicated after‑sales support.

FAQ

What materials can I sand with these discs?

The discs are suitable for metal, wood, fiberglass, plastics, and composite materials, making them a versatile choice for many projects.

Do I need a backing pad to use these discs?

Yes, a compatible backing pad is recommended to ensure proper disc stability and to protect both the disc and the workpiece during operation.

What is the maximum speed for safe operation?

The discs are rated for a maximum rotational speed of 13,300 RPM. Exceeding this speed can reduce disc life and increase safety risks.

How many discs are included in the package?

Each package contains 25 individual 4-1/2″ x 7/8″ resin fiber discs, providing ample supply for extended projects.

Is there a warranty on these discs?

Yes, Mercer offers a 90‑day warranty against manufacturer defects, giving you confidence in the product’s quality.