Clamp Some Scrap: Take some scrap wood and clamp it to your workpiece to provide a solid point on which to secure your drill bit. Small Arbors: Have a shank size of 1/3-inch (8.75mm) and are used alongside hole saws with diameters between 14mm – 30mm (1/2 – 1 inch).

Hole Saw DIY guide to the perfect drilling technique The Hole Saw DIY guide to the perfect drilling technique

Hole saws seem misleadingly easy to use. It’s no mere matter of choosing a spot before pressing down with your drill, and practice must make perfect until you’re confident. During your first few attempts, try using a practice workpiece. Drill Your Pilot Hole: Used to guide the saw, this goes right at the centre of the hole you wish to cut. As you drill, keep the bit level. If your workpiece is freestanding, take the time to secure it to prevent any spinning or other movement. Despite the name, this tool looks more akin to a drill bit than a saw – in fact, its cutting edge rests at the end of a large diameter cylinder, and this is spun on a power drill to cut through your chosen material.Cut: With scrap wood securely clamped and marked, drill a fresh pilot hole into it and then continue as normal. Screw Hole Saw and Arbor Together: Screw the hole saw onto the arbor thread, not stopping until it feels as tight as possible. If adjustable, the arbor should protrude past the teeth by around 3/8 inch and then tighten using the set screw. Eye Protection and Mouth Guard: To prevent dust or splinters getting in your eyes or being inhaled.

Hole Saws - Bunnings Australia Hole Saws - Bunnings Australia

Reduced Friction: The walls of the hole saw cylinder are relatively thin, cutting through material with less friction than solid drill bits. Less power is needed, so less strain is placed on your drill and cutting time is drastically reduced. Expect to save on energy, battery life, and time. All in all, you’ll find yourself fluent in hole saw by the time you finish reading this post. What is a Hole Saw? Understand TPI as a measure of tooth frequency along the blade. For example, 18 TPI means 18 teeth per inch, so that tooth frequency is higher than that of a 16 TPI hole saw. TPI numbers vary, but they stay within the general ballpark of 20 to 2. Let’s take a breath before diving into the particulars of using a hole saw to consider why exactly you’d want to. Other tools can cut holes, so what makes a hole saw the go-to among professionals?

Large Arbors: Have a shank size of 7/16 inch (11.1mm) and are used alongside hole saws with diameters between 32mm – 210mm (1 – 8 inches).

Hole Saws | Hole Cutters | Drilling | Screwfix

Fixed Arbors: Said to have an ‘integral shank’, fixed arbors come attached to the hole saw blade. Using one means skipping any dismantling when you need to change saw size. Deep Cut Variable Pitch Bi-Metallic: Not named through coincidence, the deep cut variable pitch bi-metallic hole saw drill will boast a cut depth up to 42.5mm. Otherwise, it retains the characteristics and benefits of the standard bi-metallic. As you’re browsing, you might consider seeking an arbor with a spring placed over the drill bit. These are known as ejector springs – they contract as you drill and then eject the slug (the cut segment) after the hole has been made. That covers the basics, but what if you need to drill holes deeper than your hole saw allows or widen an existing hole?The hole saw is a large diameter, hollow drill bit with a keen cutting blade along the outer edge. Attach one to a power drill and it rotates at high speed, cutting precise holes into anything from bathroom basins to external walls. The depth of cut is limited by the hole saw’s cup-like shape, but a variety of bit types are available to work around varying requirements. Metal Cylinder Blades with a higher TPI will cut slowly, but, less likely to tear at the fibres of your material, they also cut smoothly.

6 in. Carbide Hole Dozer Saw - The Home Depot 6 in. Carbide Hole Dozer Saw - The Home Depot

Coated: No teeth are used at all. Instead an ultra-hard material, usually tungsten carbide or diamond, coats the cutting edge. More of a niche tool, you’ll use coated hole saws to cut through heavy-duty metals, ceramics, and concrete. Unless you’re a professional, you’re unlikely to encounter the need. Serrated Saw Teeth: Typically set at a 60° angle to allow a penetrating bite into the material being cut, saw teeth are far and away the most common cutting edge. Use saw tooth hole saws for wood, plaster, softer metals, and plastic.

Cleaning

Keep it Steady: You’ll want to start slow, holding the grill tightly and squeezing the trigger lightly. Only a moderate amount of pressure is needed to push the saw through – instead of forcing it, focus on keeping the saw level. A workman’s staple, the hole saw is a tool you’ll encounter as you start to flex your DIY muscles and branch out into more interesting challenges. They’re used to cut perfectly round holes in a variety of materials. Wood and plaster are common workpieces, but metal, glass, ceramic, concrete, and stone still fall to the hole saw. Variable Pitch Bi-Metallic: Bi-metal construction boosts safety by eliminating the chance of shattering, so consider these a good step-up for dealing with slightly tougher materials or working for longer periods. Many boast hardened teeth of high speed steel for faster cutting, and variability lets you cut at different speeds according to your chosen material. Best suited to hardwood, plywood, non-laminated plastic, plasterboard, and non-ferrous metals (such as aluminium, zinc, and copper).