Silverline 612120 Lip and Spur Drill Bits 3 mm Pack of 10

Product Information

The twist bits are the most popular ones, and you can find plenty of them easily on the market. Both hand and electric drills benefit from these bits. These bits are available both in a version similar to an auger bit or brace bit, designed for low speed, high torque use with a brace or other hand drill (pictured to the right), or as a high speed, low torque bit meant for a power drill. While the shape of the cutting edges is different, and one uses screw threads and the other a twist bit for the pilot, the method of adjusting them remains the same. The market also offers longer masonry bits, from 300 to 400mm. These bits are capable of drilling masonry walls successfully and without issues. We have already discovered that lip and spur bits are used for drilling softer materials such as wood. But how do you distinguish them from metal bits? It’s pretty simple, starting with the lip and spur as the outstanding features.

We wouldn’t recommend drill bits you’ve bought for plastic be used on wood or masonry, or vice versa. Given their reasonable price, the durability is great, due to the titanium coating. If you’re only ever going to be drilling plastic, these bits will stay sharp basically forever. Cutting length varies by 5mm over the 10 drill bits, diameter – 0.1-0.2mm. These bits are for drilling holes in wood. For the “don’t care about accuracy” cases. If you’re just looking to punch some holes in a plastic lid, then going for a single 3/16″ drill bit will do you fine.The center bit is optimized for drilling in wood with a hand brace. Many different designs have been produced. Using it with a power drill ensures quality cuts for timber, leaving a smooth and clean hole. People often use it to drill holes for the sides because of how perfect the holes are.

In metal, the brad point drill bit is confined to drilling only the thinnest and softest sheet metals, ideally with a drill press. The bits have an extremely fast cutting tool geometry: no point angle, combined with a large (considering the flat cutting edge) lip angle, causes the edges to take a very aggressive cut with relatively little point pressure. This means these bits tend to bind in metal; given a workpiece of sufficient thinness, they have a tendency to punch through and leave the bit's cross-sectional geometry behind. Bench grinders are excellent for sharpening drill bits. You can simply put on some eye protection, turn on the grinder and start sharpening your bits. However, not all drill bits are suitable for this method.You may want to know why you should choose brad point drill bits over other regular bits. Yes, for productivity, brad point drill bits should not be an option. It is a simple investment and a necessity for any tool kit. Here is why you should consider brad point drill bits. Why Use Brad Point Drill Bits Over Regular Bits? Left-hand bits are almost always twist bits and are predominantly used in the repetition engineering industry on screw machines or drilling heads. Left-handed drill bits allow a machining operation to continue where either the spindle cannot be reversed or the design of the machine makes it more efficient to run left-handed. With the increased use of the more versatile CNC machines, their use is less common than when specialized machines were required for machining tasks.

Core drill bit [ edit ] HSS core drills in various sizes A magnetic core drilling machine making hole with annular cutter (core drill) However, you will need to use separate bits that are designed for either hardwood or softwood. The differences between these wood types are significant enough to create two different types of Brad point drill bits. You will need to choose both if you are working with combinations of woods.Having some brad point drill bit sets for your woodworking projects not only improves precision, but you can also save on time spent on center marking. At times cheap becomes costly, and that’s why a small investment on these bits may be worth more than several sets of ordinary bits. Conclusion Before buying them, make sure they are compatible with your projects and your hammer drills. Otherwise, you would have wasted your money, and the material could end up ruined. On the other hand, the cutting point of a softwood brad point bit is slightly rounded. The pin is not at a 90 degrees angle and it cuts smoothly into softwood.