Professional tool reviews for professionals

You might think that using a hole saw is just a matter of picking it up and drilling holes. While this may be effective in many situations, use a drill to set the optimal hole saw cutting speed-even if you are just close, you can avoid burning the blade or even damaging the material. We think it might be convenient to create a guide to set the best RPM for the hole saw when cutting any material.

Many of the best cordless drills can run at high and low speeds, and some have multiple modes and even software to control the RPM (revolutions per minute) of the keyless drill chuck. However, even if you need to throttle the drill bit manually, speed is critical. Knowing the speed of the drill can help you drill faster without damaging the hole saw. With a little practice, you can save a lot of money in the long run.

The following table shows the best RPM speed for using cemented carbide hole saws. It will guide you to cut aluminum, stainless steel, fiberglass, ceramic tiles and even cast iron at the best speed. Generally speaking-the harder or more brittle the material, the slower the cutting speed.

Of course, when using a bimetal hole saw, we must also include a table for setting the optimal RPM speed. These hole saws seem to be more prominent in the industry, and the cost is lower than their carbide blades. Considering these general speeds, you want the best cuts for mild steel, stainless steel, cast iron, brass, and aluminum. You can use the highest speed on aluminum and mild steel, while cast iron and stainless steel require more patience.

These speeds may not be achieved with existing tools. In this case, please do your best. When cutting hard or brittle materials, be sure to use this variable trigger to reduce the speed. This requires patience, but if used properly, these hole saws work best-you will most likely end up cutting material faster than running tools at full speed. You will definitely experience fewer blades!

Tools using technologies such as Milwaukee One-Key or DeWalt Tool Connect allow you to set different speed ranges for the rig. This allows you to assign up to four different speed ranges and control your RPM more easily. Although we don't think anyone will rush to buy a smart tool for hole saws only, it might help if you already have one of these drill bits in your collection.

In the past, drills had only one speed or gear. Now, they usually have two - but some are better than this. If you happen to have a drill with three or more speeds, please familiarize yourself with your settings. The manufacturer sets these different speeds at specific breakpoints. Knowing the maximum RPM for each mode will help you better understand how to feather to achieve the required drilling speed.

After some practice, this should become second nature to you.

Obviously, if you don't have electronic means to control the speed or 3-speed or 4-speed drill bit, please use the manual method. If you know the maximum speed of the rig, pulling the trigger will at least allow you to reach the basic RPM range. In any case, it is definitely better than pulling the trigger at high speed and burning the bimetal saw on the first cut!

The two charts above should provide you with a fairly clear list of how to configure the drilling speed for optimal hole saw cutting. This keeps your blade sharp and prevents metal from deforming the tip of the blade on the material due to overheating. Once you lose that edge, you might as well rub a flat piece of steel on it-you are done.

Sometimes, slow and steady does win the game!

Special thanks to Lenox Tools for providing the specifications of bimetal and cemented carbide hole saws.

When he is not remodeling part of the house or playing with the latest power tools, Clint enjoys life as a husband, father, and avid reader. He has a degree in recording engineering and has been involved in multimedia and/or online publishing in one form or another for the past 21 years. In 2008, Clint founded Pro Tool Reviews, followed by OPE Reviews in 2017, which focuses on landscape and outdoor power equipment. Clint is also responsible for the Pro Tool Innovation Awards, an annual awards program designed to recognize innovative tools and accessories from all walks of life.

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You forgot a more commonly used material, wood. I know this is not that important in wood, but I have seen many apprentices running 6-inch hole saws at full speed and they are thrown around like rag dolls. I usually run at full speed (~2000 RPM) until about 2 1/2 inches. Then I lowered it by about 200 RPM every 1/2 inch. So 3" speed is 1800 RPM, 3 1/2" speed is 1600 RPM,... 6" speed drops to 600 RPM. It is not an exact science at all, but my rule of thumb. Cork is different from... read more"

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Professional tool reviews for professionals

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