It is safe to regrind or sharpen if the chipping is even. Keep an eye out for chipping in the drill bit. When you observe visible wear or drilling takes longer than usual, then it's time to sharpen, regrind or replace your drill bit. In general, you can continue to use the drill as long as your holes are within the tolerance level, which means the wear is less than half a millimeter. The issue should be fixed by replacing the drill bit with a newer one. Look for signs of chipping or damage on the surface. If your drill bit cannot drill through the surface and fails to penetrate it, it is likely a dull drill bit. Depending on the type of materials, a slower or higher speed than recommended will cause it to reduce the drill’s performance which makes it hard for you to make a hole. Check the switch and see whether it's set to rotate clockwise for a forward motion.Ĭheck also if it is set at the proper speed. It will be tough to make a hole if your drill is set to turn in the opposite direction. The most typical reason a drill will not penetrate is if it rotates in the wrong way. Always adhere to the manufacturer's recommended speed and feed rate. Because of different drilling conditions, it’s impossible to set strict rules for feeds and speeds. Check the cutting speed and adjust the speed and feed rate as needed. If you're using a drill, make sure you have the right speed and feed rate so that the drill bit will not break. As specified by toolmakers, Chip Load is the distance the material is carried into the cutter at the tool's centerline. To reduce breakage, use the appropriate chip load. When there is a substantial chip load, drill bit breakage can occur. You can also pause in between drilling to let the drill bit cool down to minimize the risk of breaking. You can use coolants and lubricants to keep the drill bit cool and lubricated. If you drill for too long in one place without stopping, it will become too hot and break. In addition, they will not resist high torque and radial forces, causing them to break.Įxtremely high temperatures are generated during drilling. Cheaper drill bits tend to use lower-quality materials and are prone to damage. One of the most common reasons for drill bit breaking is poor drill bit strength and quality. On the other hand, high torque will cause the drill to break in the center of the flute. A drill usually breaks at the end of the flute due to radial force. What causes a drill bit to breakĭrilling into hard surfaces may cause the drill bit to break and, in some cases, become stuck. The tungsten carbide drill can drill 1,500 to 10,000 holes in aluminum, aluminum alloys, copper alloys, stainless steel, alloy steel, carbon steel, cast irons, and structural steel.īut, of course, the harder the material, the fewer drill holes you can make.A cobalt drill bit can drill as much as 1,000 to 2,000 holes on stainless steel, alloy steel, aluminum alloys, carbon steel, cast iron, structural steel, brass, and bronze.High-speed steel (HSS) can drill from 150 to 450 holes in stainless steel, aluminum, structural steel, and low carbon steel.You should expect to drill between 150 and 250 holes in concrete with each drill bit.It is also affected by the thickness and type of material drilled. How long the drill bits last can also depend on the material being drilled. But, on the other hand, the tungsten carbide drill bit will last longer than the cobalt drill bit. For example, a cobalt drill bit will last longer than regular high-speed steel (HSS). It will depend on various factors such as sharpness, drill speed, and the type of drill bit used. So how long do drill bit last? Drill bits can wear out much faster than you think. Friction and extreme heat can wear down the bit's critical cutting edges, making drilling jobs more difficult and time-consuming. Drill bits can become dull over time due to extreme heat from drilling holes on rigid surfaces and due to improper use.
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