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3/4 Inch HSS Mag Drill Bit, 3 Inch Depth

$276.58/ea $242.93/1 of each only $242.93/eaSave 12%

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OVERVIEW

Drill Cleaner, Faster, and Deeper

Stop fighting with giant twist drills and cheater bars. This 3/4" HSS Annular Cutter is built to punch through thick steel like butter. With a massive 3-inch depth of cut, you can tackle heavy plate, stacked materials, and thick-wall pipe without stopping to reset. Whether you are working on a truck chassis, erecting a steel building, or fabricating heavy machinery, this cutter turns your mag drill into a hole-making powerhouse.

Why burn up bits and your arm? This cutter works by cutting a ring and popping out a slug, which means you are removing less metal to get the same size hole. That equals less heat, less wear on your drill, and way less muscle needed to pull the handle. The High Speed Steel construction is tough enough to handle the rigors of the job site while staying sharp hole after hole.

Key Benefits for the Shop:

  • Deep Reach: 3" length handles the thickest jobs in one go.
  • Clean Finish: Leaves a burr-free hole that's ready for a bolt immediately.
  • No Pre-Drilling: Forget pilot holes and step drilling; just center it and cut.
  • Standard Fit: Fits most standard magnetic drills with a 3/4" Weldon shank.

Get the job done right the first time with a cutter designed for professional welders and fabricators.

Additional Information
Diameter:3/4
Depth Of Cut:3"
Material:High-Speed Steel (HSS)
Product Type:Annular Cutter
Cutter Diameter:3/4"
Cutting Depth:3"
Material Composition:High Speed Steel (HSS)
Shank Type:Weldon
Packaging Description:1 of each

INCLUDED

  • 1x 3/4" HSS Annular Cutter (3" Depth)

APPLICATIONS

  • Structural steel fabrication (beams, columns, plates)
  • Bridge and infrastructure construction
  • Heavy equipment repair and manufacturing
  • Truck chassis and trailer fabrication
  • Pipeline and large bore pipe drilling
  • General metalworking and maintenance

FAQ

Yes, a pilot pin is essential. It centers the cutter to start the hole and ejects the solid slug once the cut is complete.

High Speed Steel (HSS) is generally more resistant to shock and vibration than carbide, making it less prone to chipping in less-than-perfect setups. It is also more affordable and easier to resharpen.

No, annular cutters are designed for use in magnetic drill presses or stationary drill presses with the appropriate arbor. They require stability and specific RPMs that hand drills cannot provide.

Yes, using cutting fluid or coolant is highly recommended. It extends the life of the cutter, clears chips, and improves the finish of the hole.

For mild steel, a 3/4" HSS annular cutter should typically be run between 400 and 500 RPM. Always consult the specific speed chart for the material you are cutting.

While HSS can cut stainless steel, it requires slower speeds and plenty of coolant. For frequent stainless work, a Cobalt or Carbide-Tipped cutter is recommended for better longevity.

Most standard annular cutters in this size range feature a 3/4" Weldon shank (two flat spots), fitting the majority of magnetic drills.

Common causes include lack of coolant, dullness, excessive feed pressure, or movement of the magnetic base during the cut.

CATALOGUE & SPEC SHEETS

Spec Sheet