Soft to Medium Density Wheel Offers Multi-Purpose Utility
The Standard Abrasives™ Type 27 Unitized Wheel - 600 Series has a soft to medium density when compared to the rest of the Standard Abrasives™ Unitized Block line, and is designed with increased durability over the 500 Series wheels. Constructed with fine grade silicon carbide, this double-duty abrasive combines durability with a fine scratch pattern, making it a great choice for projects that require an aggressive cut yet soft finish — namely, tough blending and polishing applications.

When it comes to polishing, trust a Standard Abrasives™ 632 Unitized Wheel with silicon carbide for polishing aircraft parts, polishing after weld removal and polishing mold and die, cast aluminum, brass and copper. It is also a good match for finishing of surgical instruments and prosthetics. When working with stainless steel, choose this wheel for a clean, bright surface finish.

Due to its conformability, this wheel is great for projects with strict tolerances, because it responds to surface irregularities without gouging or undercutting the part. After prolonged use, the wheel may be dressed to maintain its shape.

Type 27 Fits 4-1/2" Right Angle Grinder
A 4-1/2" Type 27 Wheel (sometimes called a Type 27 Disc) is designed to fit a right angle grinder with a wheel guard, typically used for fiber discs, flap discs, and grinding wheels. Type 27 Wheels have a depressed center to allow grinding at any angle without damaging the surrounding surface with the attachment nut, and are particularly useful for working on internal angles. These unitized wheels are used in conjunction with, and sometimes in lieu of, a coated abrasive resin fiber disc or flap disc. Standard center hole and quick change unitized wheels are also available in a range of sizes (sold separately).

Non-Woven Unitized Construction Offers a Step Up in Density and Durability for Stubborn Surfaces
Standard Abrasives™ Unitized Wheels are a great match for tough deburring, cleaning, blending and finishing applications. They come in a broad range of densities and grades to suit different metals, the degree of aggressiveness required, shape of the part and desired finish. Although used for some of the same tasks as Standard Abrasives™ Buff and Blend products, they are designed with a far stronger and denser construction to support more aggressive applications and accomplish material removal more rapidly. Even though unitized wheels are much stiffer products, the non-woven nylon fibers of the wheel maintain the advantage of responding to surface irregularities while preserving the geometry of the piece, and produce a consistent finish.

Unitized wheels are created by starting with layers of open web material that combines non-woven fiber strands and abrasive mineral with a tough resin bond. These layers of web are then cured and compressed together. By fusing layers of open web, the abrasive gains more toughness and durability, so it can withstand repeated wear.

Ultimately, the wheel's durability is what makes it such a good match for edges. The wheel is tough enough to complete high-pressure edgework without tearing or otherwise disintegrating. Regardless of the diameter or thickness of the wheel, it maintains its structural integrity to r