It is impossible to completely stop the tools from getting heated up even though you work at a slow speed, pressure and using lubrication. WD 40, CT-90 cutting oil, Anchor lube, Elmer’s Glue-All, Olive Oil, mining oil, and water will serve you better as some of the best coolants when drilling on stainless steel. You can get coolants such as pastes, and oils, and of course, try using water.Ĭutting oil is one of the best coolants you can ever use on stainless steel as it helps to clean swarf gather around drill bits controlling the heat by reducing the friction. If you use hand tools for drilling, it is important to apply a sufficient amount of cutting oil or lubricant to the area where drilling is happening. Apply CoolantsĪpply Coolants for Stainless Steel Drilling There are best-cutting oils available such as thread-cutting oil. A promising drilling lubricant will minimize friction, controlling the heat build-up. Moreover, when drilling, you can not miss lubrication to lessen the friction. Therefore, doing a center punch before you start drilling is important to ensure that the tip of the drill bit does not wander around. When drilling a hole, many end up drilling in different spots other than the targeted spot. Drill Bit Size in Inchesĭrill Bit Sizes and RPM for Stainless Steel It is wise to start drilling with light pressure and gradually increase the added pressure till you can see fine spiral cuts around the cutting edges. Excessive pressure will result in unwanted heat. When you add a lot of pressure to the steel, the same thing will happen, as when you drill at a high speed. Accordingly, it is recommended to drill slowly to avoid the steel getting heated.Īnother fallacy is that extreme pressure will get the job done easily. When the stainless steel is work hardened, it will be extremely hard to drill into. When stainless steel is heated, it gets hardened fast. This is a huge misconception when it comes to drilling stainless steel. Many believe that the faster you drill, the quicker the workpiece will get drilled. In addition to that, you must have sufficient clearance to prevent drilling into a table or a vice. Make sure to use at least two clamps to safely hold down the workpiece. It will make the steel spin or slash with the pressure you add. Do not hold steel using one hand when drilling with the other. Place The Workpiece Properlyīefore you start drilling, secure the workpiece to a sturdy surface using clamps or a vice. Regular bits will not be able to deal with it. Your drill bits should be strong enough to drill through hard materials and resist heat. Yes, you need special bits for stainless steel made with lasting formation such as high-speed steel, titanium nitride, or cobalt. Do I need a Special Drill Bit for Stainless Steel? When drilling into stainless steel, make sure you keep the drill at a straight angle to the workpiece and drill with an even force. TiN-tipped High-Speed-Steel (HSS) is ideal for drilling stainless steel as the included Titanium Nitride lessens friction minimizing the heat that hardens the material. Cobalt boosts the power of the parent alloy, enhancing heat resistance. They are made with steel alloy with between 5% (M35 Grade) to 8% (M42 Grade) cobalt content. When choosing the right drill bit, it is crucial to consider its heat resistance capacity and hardness.Ĭobalt drill bits are specifically designed to provide heavy-duty execution on high-tensile metals. There is a wide range of drill bits appropriate for drilling stainless steel. Aircraft and aviation industry, shipping industry, power plants, etc.Bridges, buildings, airport buildings, Storage tanks, power plants,.Cookers, grills, sinks, saucepans, refrigerators, Countertops, and dishwashers Kitchen accessories, cutlery, and cookware.Some stainless steel will also contain nickel and molybdenum to improve corrosion resistance. Stainless steel is an iron alloy that includes a minimum of 10.5% chromium carbon, also silicon and manganese. What Type Of Cutting Oil Can I Use For Drilling Stainless Steel?.Can I use Titanium Drill Bit For Drilling Stainless Steel?.Do I need a Special Drill Bit for Stainless Steel?.
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