There is a wide variety of materials used to manufacture step drill bits, and each has its own strength of use. It might help if you are using a wide head screw that you want to lay flush on the surface of the material you’ve drilled. Simply go deeper with the step drill bit, or change to a larger one to enlarge the hole already there to the size you need.Īdditionally, if a chamfered edge is something you want, you can accomplish this simply by tapping the hole you’ve drilled with the next level’s bevel on the step drill bit. They are also a great tool for enlarging an existing hole. Step drill bits are also well-suited to clean holes to finish the drilling. When drilling sheet metal, there will sometimes be burrs that will need to be cleaned out of the hole before you proceed. If it is sheet metal you are drilling, a punch will be used to mark the center of the hole to be drilled, and then the step drill bit will take it from there. Larger step drill bits are blunter and cone-shaped and will always need a pilot hole drilled that is the same size as the drill bit’s smallest step. The smaller diameter step drill bits usually have a sharp point at the tip to make them self-starters that don’t need a pilot hole drilled first. Step drill bits will usually have their diameters etched into them for easy reference when looking through your collection. Their straight flute will help prevent thin, flexible materials from being twisted out of shape as the drill passes through them. Very small holes are okay with twist drill bits, but once the hole size needed is much larger than the material being drilled, a step drill bit is a much better choice. When clean holes are needed, this is a bad result. A traditional twist drill bit, like those standard drill bits that come with a power drill, will often catch a burr and be pulled right through. If you have ever tried to drill through a thin piece of sheet metal with a traditional fluted drill bit, you’ve likely encountered problems. Since many of us woodworkers are also home DIYers, it’s handy to have step drill bits for our power drills when we need larger holes and not just holes in sheet metal. You will often see an electrician use a step drill bit to drill holes in plastic switch and outlet boxes when roughing a new construction for wires to fit through or in studs as a new house is being rough-wired before sheetrock or drywall is hung. Their use, though, is not limited to sheet metal step drill bits are also used for drilling holes in plywood, drywall, laminate, plexiglass, and particle board. These specialty drill bits are capable of drilling into metal, for instance, up to ¼ “ thick, and are common on construction sites. It also makes it easier to drill larger holes a little bit (no pun intended) at a time as you push the drill bit further into the materials. This obviates the need to change drill bits while drilling holes, for instance. The deeper you drill into the material you’re working with, the larger the hole will become. Step drill bits, also referred to as unibits, are a conical-shaped drill bit that, by virtue of their shape, allows you to drill holes of varying sizes. Strengths and Weaknesses of Step Drill Bits.Safety Measures When Using a Step Drill Bit.Metal materials such as iron, copper, aluminum, alloy steel, cast iron, etc. Step 4: You can apply machine oil afterward to the bits. Step 3: Scrub any debris off the bits by using a toothbrush. Step 2: You have to wipe the bit once you are done with the work. Otherwise, it will be prone to damage faster than expected. Step 1: You need to clean the bits at a regular interval during the work. Now, is it too challenging to take good care of a step drill bit kit? Not at all, it’s as easy as it can be. This way, you won’t have to spend extra money on buying a new kit soon. If you can manage to take proper care of your tool, it will serve the purpose for a long time.
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