Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
BoraGear Hole Saw
4.5" hole saw for installing BoraGear fans
Item # 805HOLESAW | MFR # HS-101-10-C
This item is no longer available.
Our take on the BoraGear Hole Saw by Crutchfield's 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
What's in the Box:
- 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)
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.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.