Introduction
Altering the form of a material—a metal, for instance—requires a certain finesse. And finessing, as we all know, only happens with much repetition over a considerable length of time. But lots of laborious repetition by itself doesn’t unlock the secret to getting better. You’ve got to set aside those practicing-with-disks-to-the-grindstone hours and scrutinize the work you accomplished.
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For those who are keeping score, they may well count the hours they’ve spent as “practice.” But to really improve, you’ve got to do so with enough “correct” practice. And that’s what this article’s all about—practicing correctly.
1. Incorrect Use of Grinding Discs
Using the wrong grinding disc is one of the top errors to avoid. The reason this can be such a significant problem is because every grinding disc is designed for a specific use with certain materials. Mistakes can happen when an operator selects a grinding disc that looks an awful lot like the one that is needed, but that is not actually the disc needed. For instance, if someone needs to make a cut in stone, they shouldn’t choose a blade for a grinder that is designed for sawing through wood.
Some discs are specifically designed to work well with any material, but those are the exception, not the rule.
2. Ignoring Safety Precautions
Working with power tools, particularly grinders, demands complete attention to safety. Yet too often, we see workers taking unnecessary risks or even neglecting to wear the most basic personal protective equipment (PPE), like safety glasses, earplugs, and gloves. This is the setup for a potential unwitnessed bloodbath, given the inherent dangers of grindwork and the few seconds it could take for a projectile of any sort to find its mark and do serious harm. Pathogens or heavy metals on such a projectile would make the hole Urban considers and deems “perfect” far from perfect.
3. Applying Excessive Pressure
The cutting and grinding blades work most effectively using little pressure. By pushing the blades down with a lot of force, excessive heat is generated as the blades meet the workpiece material. This heat can in turn wear down the abrasive much faster, leading to a shorter-operating-life for the blade. Concentrate on maintaining a light, even pressure to not create and carry excessive heat.
4. Grinding at the Wrong Angle
How you hold the grinder really matters! It can even affect the quality of the work you do with it. What’s this “angle” that’s so important? Well, it’s just what it sounds like: the way the grinder is slanted in relation to the workpiece. The angle you hold the grinder at is key to making good cuts. If you hold the grinder too steeply (that is, way down close to the workpiece), you’re likely to grind right through the workpiece, leaving a hole. Good for making peepholes when you’re bored. Grinding with the grinder too shallow can simply produce a flat surface and premature wear on the abrasive disc.
5. Overworking the Grinding Disc
The lifespan of grinding discs is restricted. Using a worn or broken disc can reduce its performance and make workplace accidents more likely. Users should inspect the disc prior to each use for signs of wear—excessive thinning and cracking, is, of course, a prime indicator that it needs replacing if it is to continue doing its job in a safe and efficient manner.
Conclusion
The power and creative experience manufacturing engineers get when working with grinding discs should not be understated. There is nothing quite like the “cool factor” of removing tons of material in that short of a time span, and they’ve been doing it for many years now. But much power also means equally great responsibility, to borrow from Spiderman. Avoid some common mistakes, listen to safe practices, and if your tools had heads, they would thank you for it. Here are the three things not to do with a grinding head.
