Drilling through steel requires a bit more than just a regular drill bit. That’s why there are special drill bits for steel. Regular bits will try to slice through steel instead of drilling a clean hole, causing damage and unnecessary wear and tear on the bit. To avoid damaging your bits and have a successful drilling experience, it’s important to understand which drill bits for steel you need and how to use them effectively.
The first thing you should consider when purchasing drill bits for steel is the type of steel you will be drilling. Different types of steel have different hardness and properties that may require different types of bits to properly penetrate them. High-speed steel HSS bits, for example, are the most versatile kind of drill bits and work well on softer metals like aluminum and brass but may have trouble penetrating hardened steel. For harder steel, cobalt bits may be more effective due to their high heat resistance and hardness. Another option is carbide bits, which can penetrate even the toughest steel due to their extreme hardness.
Once you have determined the right type of drill bit for your steel, you should also pay attention to the bit’s size and shape. The size of the bit’s shank should be compatible with your drill’s chuck, and the bit’s diameter should match the size of the hole you want to drill. The bit’s point angle, which is the angle between the top of the bit and the center, will also affect how well it can cut through the steel. A common angle for HSS bits is 118 degrees, while cobalt and carbide bits may have a narrower angle of 135 degrees.
Before starting to drill, make sure you have taken the proper safety precautions. Wear eye protection and gloves, and clamp the steel securely to prevent it from moving while you drill. Apply cutting oil to the bit to prevent overheating and prolong the life of the bit. If you’re drilling a deep hole, periodically lift the bit out of the hole to remove any metal shavings and reapply cutting oil.
When you begin drilling, start at a slow speed and gradually increase it as the bit penetrates the steel. Trying to drill too fast can cause the bit to overheat and wear down quickly. It’s also important to maintain a straight angle while drilling to avoid damaging the bit and producing a crooked hole. If you encounter any resistance while drilling, reduce the speed or switch to a different type of bit to avoid damaging the bit or the steel.
Maintaining your drill bits for steel can also help prolong their lifespan and keep them effective. After each use, clean the bit with a wire brush to remove any debris or metal shavings. Check for any signs of wear or damage, such as dulled edges or chipped tips, and replace the bit if necessary. Store your bits in a dry and cool place away from moisture and extreme heat to prevent rust or warping.
Choosing and using the proper drill bits for steel is crucial for achieving successful and clean results. Consider the type of steel you will be drilling, the size and shape of the bit, and the safety precautions to take before beginning the drilling process. Remember to maintain and replace your bits when necessary to ensure their effectiveness. With these tips and tricks, you’ll be able to tackle steel drilling with confidence and ease.
