BoraGear Hole Saw

4.5" hole saw for installing BoraGear fans

  • BoraGear Hole Saw


  • BoraGear Hole Saw

  • BoraGear Hole Saw

  • BoraGear Hole Saw

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Our take on the BoraGear Hole Saw

by Ralph Graves

What's the easiest way to cut a hole in your cabinet for your Bora ventilation fan? Use the hole saw designed for the job. This 4.5" hole saw precisely matches the opening necessary for your fan to operate properly.


  • 4.5" hole saw
  • designed to cut ventilation holes for BoraGear cooling fans
  • works with drills that have a 1/2" chuck
  • warranty: 3 years
  • Our 60-day money-back guarantee


Product Research
What's in the box?

Download owner's manual

  • 4-1/2" (114mm) Bahco Sandflex bi-metal hole saw assembly (includes round saw blade and pin-type arbor with 1/4" drill bit)
  • Working Instructions (En/Fr/Sp + 5 other languages)

Our Product Research Team



Overview: The BoraGear hole saw, made by Bahco, is a 4-1/2" (114mm) diameter heavy duty hole saw for cutting an opening in an equipment cabinet for installing one of the BoraGear cooling fans. The hole saw comes assembled, and includes the round saw blade, a pin-type arbor with a 7/16" drive shaft, and a 1/4" drill bit.

Sandflex Bi-metal Hole Saw: The Bahco Sandflex bi-metal hole saw works excellently on most materials, including wood, plastics, non-ferrous and ferrous steel, including stainless steel. It has 4/6 teeth per inch, and a maximum cutting depth of 1-1/2". Four knockout holes allow you to easily remove the cores, once the hole is cut.

Operating Speeds: The speed (RPMs) of the drill depends upon the material being cut. For this 4-1/2" diameter hole saw, the following speeds are recommended:

  • Mild Steel: 75 RPM
  • Tool and Stainless Steels: 35 RPM
  • Cast Iron: 50 RPM
  • Brass: 100 RPM
  • Aluminum: 105 RPM
  • Wood: 900 RPM

Precautions: The following precautions should be followed:

  • Always wear safety goggles.
  • Cutting oil should be used when sawing steel. (Do NOT use cutting oil when sawing cast iron.)
  • Cutting pressure should be high so each tooth cuts deep.
  • Apply the hole saw perpendicular to the workpiece.
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