The 80mm Bi-Metal Hole Saw provides users with an opportunity to transition from heavy duty construction use to residential/renovation type jobs. Its cutting diameter is about 3.15", and its 35mm (1.38") Depth Of Cut, makes it capable of producing accurate circular cuts in various types of Non-Ferrous Materials. The term "Bi-Metal" is used to describe how the tool was manufactured. A High-Speed Steel Cutting Edge was fused to a Carbon Steel Body. The combination of the two allows for the cutting edge to the remain extremely sharp and Heat Resistant and will absorb the stress and vibration associated with high speed drilling. As a result of this design and the Bi-Metal Hole Saw is able to easily drill into all types of soft materials and including Wood and Plastic and abrasive surfaces such as Drywall and Fiberglass without dulling the cutting edges or distorting the body of the saw.
Using the Bi Metal Hole Saw with a 3.15inch cutting diameter is ideal for projects involving wood. Examples of tasks include installing Recessed Lighting, running large amounts of PVC Pipe through Joist Hangers, or making decorative openings in furniture. The Variable Pitch Teeth were designed to efficiently remove sawdust, eliminating the potential for the saw to bind or get stuck in a board. The same Bi-Metal Construction that works so well in wood also helps make the process of drilling into Plastic easier. When drilling into Storage Bins or Poly-Tank, the Bi-Metal construction helps provide a smooth edge with less melting, provided the user maintains a constant Moderate RPM. Drilling into Drywall and Fiberglass presents a different challenge. These materials produce very fine, abrasive dust that can quickly damage standard steel bits. The High Speed Steel edge of a Bi-Metal saw has been constructed to resist the abrasive qualities present in Drywall and Fiberglass. This enables the creation of consistent Professional Grade holes with virtually no need for Sanding or Finishing After completion.
A 35mm (1.38") depth capacity is crucial because it enables the user to drill through almost all Standard Construction Lumber (such as a 2x4) in one pass. Achieving optimal result to requires pairing the 80mm Hole Saw with the Compatible Arbor featuring a Pilot Bit. The Pilot Bit serves as a Guide enabling the saw to enter the Material Perpendicular to the Surface and Prevents Walking, which occurs when the saw Skids Across the Surface Before Biting. Pulsating is another method to obtain successful results when drilling into larger or denser Materials. Backing the saw out periodically will help Remove Debris and Allow the Metal to Cool Down. Utilizing Pulsating Techniques will Significantly Increase the Life Expectancy of your Cutting Edge and Eliminate Scorch Marks Caused by Friction Build-Up Too Much Heat Against the Grain of the Wood.
In terms of Safety and Stability, there are concerns related to operating a Hole Saw of this size due to Increased Torque. Users should ensure their Power Drill is Equipped with a Side Handle to the Obtain Better Control and Grip during operation and especially when the saw gets Stuck on a Knot in Wood or Thick Layers of Fiberglass. Eye Protection and Dust Masks are also Highly Recommended when working with Fiberglass and Drywall due to Fine Particles Generated That Can Irritate Lung Tissues and Eyes. Due to the Larger Diameter Size (about 3.15 inch) and the Drill Should Be Set Up for Lower Speed Setting to Maximize Torque and Control. If you follow the Tools Limitations and Use Your Hand Steadily, the 80mm Bi-Metal Hole Saw Will Become an Indispensable Tool for Any Project Requiring Large, Accurate Apertures Through Various Types of Building Materials
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