Your DIY tasks are more efficient and less time-consuming if you use the right tools for every job. When drilling holes, you can choose between a wide variety of different drill bits. The manufacturing of the drill bits is a science or precision and the right bit does make a huge difference in terms of quality. If you need bits for your step drill, consider the bit purpose, coating and the material you need to drill.Basics of Step Drill Operation
Step drills are power tools that generate holes at a slower speed than other drill types. The drill bit rotates in a clockwise direction. Each step enlarges the hole and it gets bigger gradually. The transition between the original and the ground diameter comes at either an angle, forming a countersink, or straight to form a counterbore. This structure prevents the step drill bit from clogging when drilling softer materials like aluminium. Typically, you need a specific step drill bit for each material to get the job done properly. If the bit is sharp and suitable for the material you need to drill, you only need to exert little pressure onto the drill for it to work.Step Drill Bit Sizes
The smallest step drill bits are self-starting, so there is no need for a pilot drill to start the hole. Larger bits, on the other hand, require a pre-drilled hole with the same diameter as the smallest step on the drill bit. You should also make a central dent in the future location of the hole. This way, the drill does not drift once you start drilling. You can use the smaller step to drill through the material and then the larger step drill bit to make the hole bigger.Step Drill Bit Types
Wood step drill bits are made of steel and they are typically less expensive than other types. Titanium coated and high-speed bits are much harder and more durable and thus cost more as well. The highest quality step drill bits are the cobalt and carbide tipped drills.