10 bestStep Drill Bitsof May 2025
112M consumers helped this year.
1
3PCS Premium HSS & Cobalt Spiral Step Drill Bit Sets, TiAlN Coated for Superior Durability, Cone Drill Bit for Sheet Metal, Stainless Steel, Aluminum, Wood, Plastic and DIY Projects
ss shovan
9.9
2
3PCS HSS Step Bits, High Speed Steel Step Drill Bits Set - (4-12mm, 4-20mm and 4-32 mm) Cone Drill Bits Hole Cutter for Wood, Stainless Steel, Sheet Metal by SS SHOVAN
SS SHOVAN
9.8
20% off
3
3PCS HSS Spiral Step Drill Bit Sets, SS SHOVAN 4-Flute Metal Drill Bits, 1/4" Hex Shank, Metric 4-32mm Cone Cutter, Hole Cutter for Sheet Metal, Plastic, Steel Plate
SS SHOVAN
9.8
4
toolant Four Spiral Flute Cobalt Step Drill Bit(Pro Max), 4-22mm Impact Ready Four Spiral Flutes Unibit Step Bit, 1/4" Hex Shank Unibit for Metal, Stainless Steel, Aluminum, Wood, Plastic
AugTouf
9.6
25% off
5
Step Drill Bit HSS Titanium Step Drill Bit For Metal Multiple Hole Drilling Cone Drill Bit Stepped Up Bits For DIY Lovers (5-35MM Step Bit)
YOKOCUT
9.4
Other
Spiral Grooved Step Drill Bit Set, High Speed Steel Titanium Coated, 4mm to 12/20/32 mm (5/32" to 5/4") Hex Shank Metric, HSS Cut Tool Set for DIY Plastic Wood Metal Aluminum Copper
Milwaukee 4932352376 Set of Drill Bits Hss-G Thunderweb-25Pc
IRWIN Step Drill Bit, 1/8-Inch to 1/2-Inch Step, 1/4-Inch Shank (10231) Silver|Silver metallic
Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)
6
UK Drills HSS Step Drill Bits Set Titanium Coated 3pc 3-20mm for Drilling on Hard Metal, Stainless Steel, Cast Iron
UK DRILLS THE PROFESSIONALS CHOICE
9.2
7
STROTON Metric M35 Cobalt Step Drill Bit for Stainless Steel and Hard Metal (4-32mm/15 steps)
STROTON
8.9
14% off
8
YOKOCUT Cobalt Step Drill Bit for Stainless Steel and Hard Metal, High Speed Steel 6% Cobalt Step Bit with AlTiN Coating, Cone Drill Bit Multiple Hole Cutter (4-32mm, 15 Steps)
YOKOCUT
8.6
9
Milwaukee 3PC Step Drill Set (4-12, 4-20, 6-35mm)
Milwaukee
8.4
39% off
10
Bosch 2608597520 4 - 30/10/100 mm HSS-TiN Step Drill Bit
Bosch
8.1
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A Guide to Selecting the Best Step Drill Bits
Step drill bits are essential tools for anyone who needs to drill holes of various sizes in materials like metal, plastic, or wood. They are particularly useful for tasks that require precision and versatility, such as electrical work, plumbing, and DIY projects. When choosing the right step drill bit, it's important to consider several key specifications to ensure you get the best performance and longevity from your tool. Understanding these specs will help you make an informed decision based on your specific needs and the materials you will be working with.
Material
The material of the step drill bit is crucial because it determines the bit's durability and effectiveness. Common materials include high-speed steel (HSS), cobalt, and titanium-coated bits. HSS bits are suitable for general-purpose drilling in softer materials like wood and plastic. Cobalt bits are more durable and can handle harder materials like stainless steel. Titanium-coated bits offer a balance of durability and performance, making them ideal for frequent use on a variety of materials. Choose the material based on the hardness of the materials you will be drilling.
Size Range
The size range of a step drill bit refers to the range of hole diameters it can create. This is important because it determines the versatility of the bit. Step drill bits typically have multiple steps, each corresponding to a different hole size. For general use, a bit with a wide size range (e.g., 1/8 inch to 1/2 inch) is ideal as it can handle various tasks. If you have specific needs, such as drilling larger holes, look for bits with larger maximum diameters. Consider the range of hole sizes you will need for your projects to choose the appropriate size range.
Number of Steps
The number of steps on a step drill bit indicates how many different hole sizes it can create. More steps mean greater versatility, allowing you to drill a wider range of hole sizes with a single bit. However, more steps can also mean smaller increments between sizes, which is useful for precision work. If you need a bit for general-purpose use, a bit with fewer steps and larger increments may be sufficient. For detailed and precise work, choose a bit with more steps and smaller increments.
Shank Type
The shank type of a step drill bit affects how it fits into your drill. Common shank types include round, hex, and tri-flat shanks. Round shanks are standard and fit most drills, but they can slip under heavy loads. Hex shanks provide a more secure fit and are less likely to slip, making them ideal for high-torque applications. Tri-flat shanks offer the best grip and are designed to prevent slipping entirely. Choose the shank type based on the type of drill you have and the nature of your drilling tasks.
Coating
The coating on a step drill bit can enhance its performance and longevity. Common coatings include black oxide, titanium nitride, and cobalt. Black oxide coating provides basic protection against rust and wear, making it suitable for general-purpose use. Titanium nitride coating offers superior durability and reduces friction, which helps the bit stay sharp longer and drill more efficiently. Cobalt coating is the most durable and is ideal for heavy-duty applications and drilling hard materials. Choose the coating based on the frequency of use and the toughness of the materials you will be drilling.
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