20079 - United Abrasives SAIT A24R Type 27 Grinding Wheel, 6-Inch x 1/4-Inch

Technical Overview: United Abrasives A24R Grinding Wheel

The United Abrasives 20079 is a high-performance Type 27 depressed center grinding wheel designed for industrial metalworking applications. Engineered with a proprietary aluminum oxide grain structure, this wheel is classified as an A24R grade. The 'A' denotes aluminum oxide, the standard abrasive for ferrous metals, while the '24' grit size provides a coarse texture ideal for rapid stock removal. The 'R' hardness rating indicates a hard bond, which significantly enhances the wheel's durability and lifespan under heavy load, making it a cost-effective solution for high-volume operations.

Structurally, the wheel features a 6-inch diameter with a 1/4-inch thickness and a standard 7/8-inch arbor, making it compatible with a wide range of pneumatic and electric right-angle grinders. It is rated for a maximum speed of 10,200 RPM. Safety is paramount in the design; United Abrasives incorporates internal and external fiberglass reinforcement layers. These layers provide high tensile strength to resist breakage and shattering during aggressive grinding, ensuring compliance with safety standards for bonded abrasives.

The Type 27 geometry features a depressed center, which allows the mounting nut to be recessed. This design enables the operator to grind at a 15 to 30-degree angle relative to the workpiece, facilitating effective material removal on both flat surfaces and irregular contours. The wheel is specifically optimized for ferrous metals, including structural steel, iron, and heavy welds, delivering consistent performance without glazing or loading.

Manufactured in the USA, the 20079 wheel represents United Abrasives' commitment to quality and consistency. The uniform grain distribution ensures that the wheel maintains its cutting efficiency throughout its diameter reduction, providing predictable results from the first spark to the stub.