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GUIDE TO CUTTING WHEELS In metal fabrication and manufacturing operations, various tools use cutting wheels to cut material from a workpiece. What is a cutting wheel? Cutting wheels, or cut-off wheels, differ from grinding wheels in their function and structure. Where grinding wheels use an abrasive to grind large pieces of material off a workpiece from a shallow angle, cutting wheels typically make narrow, precise cuts at 90-degree angles. Consequently, cutting wheels are often thinner than grinding wheels — though they do not have the lateral strength required for side grinding, their minimal thickness makes them better for clean, accurate cuts. WeiXiang Abrasives offers several cutting wheels for different applications. We provide everything from 1-millimeter cutting wheels to extended-diameter wheels for larger cuts. This guide to cutting wheels covers the differences between various types of cutting wheels and explains how to choose the right wheel for a given application. TYPES OF CUTTING WHEELS Cutting wheels come in a few different types. Some common types are type 1, type 27, type 41, and type 42, where the various numbers signify the wheels' different shapes and properties. TYPE 1 CUTTING WHEEL (TYPE 41 CUTTING WHEEL) A type 1 cut-off wheel, also known as a type 41 cut-off wheel, is completely flat. It is typically considered the most efficient type of wheel for general all-purpose cutting. Because it lacks a depressed center, it provides more cutting surface and minimizes interference with the workpiece. The flat profile helps create deep 90-degree cuts into a workpiece. It allows for the maximum depth of a 90-degree cut at the expense of a small amount of visibility for the operator. Though their straight profile and the way they mount close to the guard can diminish visibility for the operator, type 1 cutting wheels are exceptionally useful in grinders, die grinders, high-speed saws, stationary saws, and chop saws. TYPE 27 CUTTING WHEEL (TYPE 42 CUTTING WHEEL) Instead of being completely flat, a type 27 cut-off wheel, also known as a type 42 cut-off wheel, has a depressed center. The depressed center allows for added clearance when the operator is working at a constrained angle, though it gives the wheel limited cutting ability when working around corners, profiles, or extrusions. The depressed shape allows for a raised hub as well to hold the wheel securely in place. The profile of a depressed-center cutting wheel gives the operator a better view of the cut, and it provides the ability to flush-cut because the raised hub means the locking nut can be recessed. Type 27 cutting wheels are designed for right angle grinders.
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