Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]

Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]

110,000.00 TZS
110,000.00 TZS 165,000.00 TZS
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Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]
  • Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]
  • Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]
  • Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]
  • Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]
  • Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]
Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]

Four Spiral Flute Step Drill Bit, HSS Step Drill Bit 3/16-1-3/8 (3 Popular Sizes) Unibit Step Drill Bit, 1/4" Shank Step Bits for Aluminum, Wood, Plastic, Metal [Sold 637]

110,000.00 TZS
110,000.00 TZS 165,000.00 TZS
With magnet No
Batteries included No
Material Steel

User Reviews:

1. "This step drill bit cuts through metal and plastic like butter. The spiral flutes make it so much smoother and faster than my old one. Great value for the price!"
2. "Very sharp and durable. I used it on aluminum and wood, and it drilled clean, precise holes every time. Highly recommend for DIY projects."

About this item

Product Specification

Product Description

PRODUCTION PROCESS OF OUR STEP DRILL

1.Material Selection: The first step is to select a material suitable for the step drill. Using High Speed Steel (HSS)

2.Blank preparation: The selected material is obtained in the form of a blank, which is a cylindrical rod with a larger diameter than the final stepped drill bit. Blanks are usually obtained by processes such as forging, extrusion or bar.

3.Grinding and Shaping: The blank is then machined using a grinding operation to obtain the desired shape for the step drill. This involves using a precision grinder to remove excess material and form the flutes, steps and cutting edges of the drill.

4.Heat Treatment and Nitriding: Partially formed step bits are heat treated to increase hardness, strength and durability. The specific heat treatment process can vary depending on the materials used.

5.Finishing operations: After heat treatment and nitriding, step drills undergo final grinding and polishing operations to obtain precise dimensions, smooth surfaces and sharp cutting edges. This ensures the precision and performance of the drill.

6.Quality Control: Throughout the manufacturing process, quality control measures are implemented to ensure that stepped bits meet specified standards and tolerances. This may involve dimensional inspection, hardness testing and visual inspection.

Introduction
 
The Four Spiral Flute Step Drill Bit is a high speed steel (HSS) unibit-style step drill designed for accurate hole-making across multiple materials. Built from high quality alloy steel and subjected to inspection at the factory, this step drill bit is intended for long service life and dependable performance in DIY and home projects. What sets it apart is the ultra-stable 4-flute stepped design, which is meant to reduce deflection during cutting. That stability can help support improved accuracy and cutting speeds compared with ordinary step drills. The bit also features laser engraved step sizes, making the drilling process easier by providing clear step visibility during use. With a 1/4" shank step bit format and multiple popular step sizes listed as 3/16–1-3/8, it’s suitable for drilling through thin metal and a range of materials including copper, aluminum, iron, carbon steel, wood and plastic.

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