3M 7000121938 Unitized Abrasive Wheel 3 in Ao 1/4 in Arbor

Product Description

The 3M 7000121938 is a unitized abrasive wheel built for heavy-duty edge deburring and surface finishing on metal. Part of the 800 Series, this wheel uses aluminum oxide mineral bonded into a hard-density, open-web construction. The hard density delivers extra edge durability compared to lower-series unitized wheels, making it well suited for aggressive deburring cycles and stainless steel polishing work. The open-web structure resists loading, which extends abrasive service life under sustained use. Licensed trades and fabrication shops running angle grinders, die grinders, or bench-mounted finishing tools will find this wheel a practical consumable for production and maintenance work.

This wheel is designed for ferrous and non-ferrous metal applications, including aluminum, carbon steel, and stainless steel. Common use cases include edge deburring after cutting or stamping, weld blending, and light surface conditioning. The 3 inch diameter and 1/4 inch arbor fit a standard mandrel setup on portable or stationary power tools. The wheel runs in both clockwise and counterclockwise directions, which adds flexibility when paired with different tool configurations or machine setups. Minimum purchase quantity is 10 wheels per order.

Key Features

• Hard-density 800 Series construction delivers greater edge durability than 700 Series unitized wheels
• Aluminum oxide mineral is compatible with ferrous and non-ferrous metals including aluminum and stainless steel
• Open-web design resists loading for extended abrasive service life in heavy-duty applications
• Runs clockwise and counterclockwise for versatility across tools and machines
• 3 inch diameter with 1/4 inch center arbor hole; attaches via a unitized wheel mandrel sold separately

Compatibility

Designed for use with portable die grinders, angle grinders, and bench finishing machines that accept a 1/4 inch arbor mandrel. Mandrel sold separately. Suited for heavy-duty edge deburring and polishing of ferrous and non-ferrous metals.

Installation Notes

Installation and wheel changes should be performed by qualified personnel following the tool manufacturer's instructions and applicable ANSI safety standards for abrasive wheels. Ensure the tool is fully powered down and disconnected from its power source before mounting or removing the wheel. Inspect the wheel for damage before each use and confirm the mandrel and spindle speed rating are compatible with the wheel. Do not exceed the rated maximum RPM of the wheel or the tool.

Technical Specifications

• Series: 800 Series Unitized
• Mineral: Aluminum Oxide
• Wheel Diameter: 3 inches
• Arbor Size: 1/4 inch
• Density: Hard
• Weight: 1.089 pounds
• Package Length: 7.31 inches
• Package Width: 4.19 inches
• Package Height: 3.88 inches
• Unit of Measure: Each
• Minimum Order Quantity: 10
• UPC: 051115333076

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121938