Shorter drill bits are more accurate and because they’re more rigid they don’t break as often. Black Oxide (surface treatment) Helps reduce friction and increase chip flow.
Tin (titanium nitride, gold color) Can be run faster than uncoated drills and increased tool life. Tin (titanium carbonite, blue-gray color) Great for stainless steel, cast iron and aluminum.
Choosing the right drill bit for the task is an important part of any project or application. Information and expertise for this material provided courtesy of Greenfield, Industries, Inc.
Black oxide-coated HSS drill bits have a finish designed to help resist corrosion and increase durability. They last longer than basic HSS bits and work well on a variety of materials including metal, hardwood, softwood, PVC and fiberglass.
They're tougher than basic HSS bits and stay sharp longer. Flatter points, such as those with 135-degree angles, are suited for drilling into harder material.
Bits with steeper points, such as those with 118-degree angles, are suited for softer material. They stay on center better and produce cleaner entry and exit holes.
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. A round shank allows you to accurately center a bit in the chuck.
A hex shank has flat surfaces, allowing the tool to grip the bit more securely for greater torque. A slotted drive system (SDS) shank is designed for use on a hammer drill.
As with the brad-point bit, large flutes help remove chips and dust. The bit can be up to 18 inches long and drills through wood, plaster and some masonry.
It has a flattened blade with a sharp point that helps position and steady the bit. A Forster bit bores smooth, clean holes in wood.
Pull the bit out regularly to clear away chips and dust as you work. It also creates a plug of waste material; a cut-out in the side of the saw cylinder allows you to push it out.
Typically, a hole saw attaches to an arbor or mandrel, which includes a shank. The arbor also holds a pilot bit for centering and steadying the cutting blade.
A hole saw with a carbide edge works on heavier materials such as ceramic tile and masonry. A hole saw with a diamond edge also works on tile and masonry but cuts faster than carbide models.
In a single action, the bit can drill pilot, countersink and counterbore holes, allowing you to countersink a fastener and install a plug over the fastener head. A step bit is designed primarily for drilling in thin metal, up to 1/4 inch, but will work with wood.
The stepped design allows you to use a single bit to drill holes with different diameters. You can also use this type of bit to debut holes, clearing away waste material.
Some work with a standard corded or cordless rotary drill, but those designed for use with a rotary hammer or hammer drill can help the concrete drill bit bore into masonry more effectively. Drill saw bits cut irregular holes and contours in wood and metal.
They allow you to drill angled holes that accept screws for making wood joints. Screw or bolt extractors work with a reversible drill /driver to back out damaged fasteners.
CRAFTSMAN 47-Piece Steel Hex Shank Screwdriver Bit Set Zinc alloys can be drilled under a wide range of operating conditions using cutting fluids.
This geometry was designed for drilling non-ferrous alloys and has large, smooth flutes and thin webs that reduce friction and thrust forces and enhance chip flow away from the cutting edges. Resharpening by hand is not recommended; it should be done in appropriate jigs to ensure correct angles and geometries using fine grinding wheels.
Modifying drills with flats or by web thinning is not recommended unless care is taken to maintain smooth flute surfaces. Countersinking removes burrs from drilled holes and sinks screw heads to reduce or eliminate protrusion above casting surfaces.
The optimum feed rate should be determined by trial; pressing and holding the tool quickly against the workpiece will achieve the best quality. An alloy, with at least 10.5 percent chromium and available in several grades, stainless steel is popular because of its low maintenance, high sheen, and resistance to stains and rust.
Drill bits built to work on softer material, like wood, won’t do the trick against stainless steel. Luckily, manufacturers purpose-design special drill bits capable of puncturing even the hardest grade of stainless steel.
The BEST OVERALL: IRWIN Drill Bit Set, M35 Cobalt Steel, 29-Piece the BEST BANG FOR THE BUCK: Seiko 10193A Titanium Step Drill Bit Set BEST UPGRADE: 230 Pieces Titanium Twist Drill Bit Set MOST DURABLE: Honor Metric M35 Cobalt Steel BEST FOR HOBBYISTS: Bosch CO14B 14 PC. To identify the best drill bits for stainless steel, learning about characteristics like material, coating, frequency of use, and drill bit number is critical.
Read on to learn the factors to consider as you search for the best drill bits for your projects that involve stainless steel. One way that manufacturers achieve this hardness is by infusing materials that facilitate penetration and protect against overheating.
Titanium and tungsten carbide are nearly as hard as diamond, making them ideal for penetrating steel. Many manufacturers complement construction materials like drill bits with metal coatings.
The coating provides the ancillary benefit of being ultradurable, making them an excellent value for consumers who intend high-frequency use. Another crucial consideration when purchasing drill bits for stainless steel is the drill bit number or size.
Individuals who intend to drill stainless steel frequently should be sure to buy bits designed with longevity in mind. In addition to ultrahard materials and protective coatings, drill bit users who seek longevity should ensure the bit can be sharpened.
Our top picks are based on their ability to effectively drill stainless steel, in addition to their durability, construction, and precision. Read on to discover some best drill bits for stainless steel to ensure they are the right fit for your next project.
A rubber-reinforced carrying case protects the drill bits from accidental drops and makes organization and transportation a snap. For the precision steelworker with budget considerations, Seiko packs a lot of punch into a 3-piece drill bit set.
The 135-degree split point tip starts drilling at contact, reducing friction, pressure, and heat. These bits are constructed from high-speed steel with a titanium nitride coating that facilitates penetration and protection from heat and high-rotation operation.
In addition to stainless steel, they perform well on aluminum, zinc, wood, and other materials; the 135-degree split point tips facilitate penetration and decrease the force required to drill. The spiral flute clears shavings during drilling, and the split-point tip eases penetration and keeps the heat at lower levels.
With proper maintenance and storage, these drill bits are likely to outlast even the most stubborn materials. The quality also ensures increased longevity, up to 10 times the life of standard drill bits, which is complemented by a convenient carrying and storage case.
This set is compact with surface-hardened tips designed to penetrate stainless steel, and the quality construction ensures years of service to even the most fervent hobbyist. Though drill bits for stainless steel pull heavier duty, they are also made of more durable materials.