![]() The bit can move forward and backward with the hammering motion of the drill, while flattened areas and slots on the shank allow the chuck to hold the bit. It fits a spring-loaded chuck that doesn't require tightening. A slotted drive system (SDS) shank is designed for use on a hammer drill.Hex shanks such as the one in the image above work with quick-change chucks - common on cordless drills - allowing you to insert and remove them without tightening and loosening the chuck. A hex shank has flat surfaces, allowing the tool to grip the bit more securely for greater torque.A round shank allows you to accurately center a bit in the chuck. ![]() A larger bit may have a reduced shank - a shank with a smaller diameter than the body of the bit - allowing you to use it with smaller chucks. The bit shank size must not exceed the chuck size of the drill. Connect them directly to drills, power screwdrivers, and other tools that accept a 1/4' hex shank. ![]() With a drill bit point to drive into the workpiece, these tools can drill and tap holes in a single step. Drill and tap holes in a range of diameters. Drill presses also have larger chucks, 1/2 inch or 5/8 inch, for example. Hex-Shank Combination Drill Bit/TapSets for Drills and Screwdrivers. More powerful drills for heavier applications have a larger, 1/2-inch chuck. A smaller drill for work around the house typically has a 3/8-inch chuck. The chuck on a hand drill or drill press secures a drill bit to the tool along the bit's shank. You can add larger bits - 5/16-inch, 3/8-inch, 7/16-inch and 1/2-inch bits - if you need them. Some projects call for specific drill bit sizes, but a bit set that includes sizes from 1/16 inch to 1/4 inch will work for many jobs around the home and workshop. If you enjoy do-it-yourself projects, a drill bit set is indispensable. Bits with split-point tips improve drilling accuracy by keeping the bit from wandering when you begin to drill.īit size reflects the diameter of the body. High-speed steel Drill Bits and Drill Bit Sets for Every Kind of Material. They stay on center better and produce cleaner entry and exit holes. Bits with steeper points, such as those with 118-degree angles, are suited for softer material. They may require a pilot hole to keep the bit from wandering. Flatter points, such as those with 135-degree angles, are suited for drilling into harder material. They're effective for drilling tile and masonry.įor most drill bit types, the angle of the point helps determine what type of material the bit can drill. Carbide-tipped drill bits stay sharp much longer than steel, HSS or titanium bits.They work for drilling wood, metal, fiberglass and PVC. They're tougher than basic HSS bits and stay sharp longer. Titanium-coated HSS drill bits produce less friction.They last longer than basic HSS bits and work well on a variety of materials including metal, hardwood, softwood, PVC and fiberglass. Black oxide-coated HSS drill bits have a finish designed to help resist corrosion and increase durability.They're mostly used for boring in aluminum and tough metals such as stainless steel. Cobalt drill bits are extremely hard and dissipate heat quickly.High-speed steel (HSS) drill bits can drill wood, fiberglass, polyvinyl chloride (PVC) and soft metals such as aluminum.The materials from which bits are manufactured and the finishes applied to them play a significant role in the life and performance of the bit.
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