Machine Mart Limited is authorised and regulated by the Financial Conduct Authority, register number 703528 and acts as a credit broker and not a lender. This 13 Piece HSS Twist Drill Bit Set is ideal for drilling in steel, iron, non-ferrous metals, plastics and wood. Overall though, we really liked the split-point tip and 3-flat shank for secure chucking, smooth drilling, and easy sharpening. It bears mentioning, however, that the kit only includes smaller bit sizes in 1/16-inch increments, which makes it ideal for crafting and detailed drilling. Since the manufacturer recommends these bits for cordless drilling, we tested the Milwaukee step bits twice, first in the drill press and then in a handheld cordless drill.

We tested with an eye out for the best drill bits that might work especially well for specific metals, such as which ones may be best for stainless steel or best for cast iron.Tool Steel with Tungsten Carbide Tips– TCT provides a longer working life for the bit while allowing for a more stable and solid tip and enabling it to withstand more rigorous drilling applications. The CHT384 Clarke Drill Bit Set are cobalt steel drills which offer higher heat and abrasion resistance compared to HSS drills, making them more suitable for use on hardened steel, super alloys, titanium. Those looking to drill at shallow depths through sheet metal will want to consider using a step bit. The M35 alloy bits are made from an alloy of steel and 5 percent cobalt for longer life under tough drilling conditions. Step drill bits offer the advantage of fast, clean precision drilling into thin metals without changing bits.

Most twist bits come in diameters ranging from 1/16 inch to ½ inch, creating holes corresponding to the diameter. As the host of beloved and groundbreaking TV series including “This Old House” and “Bob Vila’s Home Again,” he popularized and became synonymous with “do-it-yourself” home improvement. Machinists, mechanics, DIYers, and crafters value cobalt bits for their ability to drill hard materials and because they can be resharpened. Drilling into hard stainless steel with a poorly designed bit leads to bit breakage, bit shafts spinning in the drill chuck, or the tip simply not penetrating the surface. This set is durable, with 5 percent cobalt steel alloy, though not as strong as M42 bits, which contain 8 percent alloy.A comprehensive, trade use set of DeWalt HSS drill bits, all housed in a useful and robust storage case. These HSS-Co Extreme drill bits can make light work of various sheet metals, as well as wood and plastics, but they are especially good at tackling stainless steel and are an essential addition for anyone using a drill. For the first round of drilling evaluations, we selected the 1/16-inch, 3/16-inch, and ⅜-inch bits from each set. Countersink drill bits create shallow holes that allow the head of a fastener to sit flush with the material and are angled to match the tapered head of the fastener. EXTREME 2™ Metal tip starts drilling on contact eliminating walking for clean, accurate holes (diameters 4.