There are so many 4-1/2" angle grinders on the market to choose from, with new versions hitting the market annually. While most are good matches for high-performing Kutzall wheels, there are important points to be aware of when selecting a grinder to use. A key consideration is the design of the safety guard.
Most angle grinders have a general-purpose wheel guard, which can accept a variety of accessories. These general-purpose guards are usually described as being for Type-1 abrasive wheels. If you want to use Kutzall wheels, these Type-1 guards should work perfectly. However, we suggest that you stay clear of grinders which come with a specialized Type-27 wheel guard. A Type-27 conventional abrasive wheel is a recessed-center wheel, and matching guards are often tapered on the top, like a shallow funnel. A Kutzall wheel may jam against the back of a Type-27 guard before the nut is fully tightened, preventing the wheel from clamping correcting or rotating freely. Please see the accompanying diagrams.
Type-1 Guard Design:
Type-27 Guard Design:
Kutzall wheels are designed to fit on grinders which have a stepped-nut set or a stepped-nut and bushing set, with mounting shoulders to accommodate grinder accessories with a standard 7/8" or 18 mm I.D. Please see our Kutzall Mounting Guide for more detailed information on fitment.
A feature offered by some modern angle grinders is a "safety brake." This device stops the grinder significantly faster than it would when coasting after the trigger is released. While a brake seems like a useful safety feature, users operating accessories heavier than a conventional abrasive cut-off or grinding wheel sometimes have reported that the brake engages so quickly that the nut and accessory can be spun right off the grinder. Thus, please consider this possible complication before purchasing an angle grinder with the braking feature, if you intend to use a Kutzall wheel, or anything of similar mass.
It's important to know exactly how our accessories and the power tools you use will come together when making your purchase. If you want to take the guesswork out of it, check out our list of Kutzall Perfect Pairings. This list has our top power tool recommendations for the Kutzall discs, dishes and burrs. Check it out here!