Rather than having jagged or crenellated teeth protruding from the cutting edge, these types of hole saws instead feature a flat rim that’s coated with a hard, abrasive material such as diamond or carbide.

While these sorts of tough working conditions don’t often cause an immediate or catastrophic failure in other types of hole saw bits, they can degrade the product relatively quickly if it wasn’t designed for the job, making them much less cost-effective over time. Crafted from durable materials and featuring sharp teeth, these hole saws are engineered for efficiency and longevity. Usually these holes will be made in some form of sheet material - see the sections below for specific examples and applications - although hole saws can also be purchased at varying lengths/depths as well as different diameters.

Clarke's hole cutter set includes 6 popular sizes of bi-metal hole cutters plus a hex drive adaptor and pilot drill.

They may sometimes require some form of water-cooling to be applied in use, as the increased friction area can generate excessively high temperatures. These accessories can help to extend the life of glass cutting tools and ensure optimal performance. This Heller HSS Bi-metal Hole Saw is perfect for creating clean, circular hole thanks to its ingenious precision manufacturing. While collections of guidelines are seldom any match for hands-on experience in this department, there are some fairly universal techniques and basic user tips that all hole saw operators should bear in mind when approaching a new job. Duologi is the trading name of Specialist Lending Ltd, which is authorised and regulated by the Financial Conduct Authority (register number 774712).As a result, carbide-tipped teeth are a feature to look out for on hole cutters intended for metal working. This delivers more brute power to these harder or more abrasive cutting surfaces, at the cost of a somewhat less neat hole. this comprehensive selection of twelve circular blades will cover quite a full range of installation and building requirements for both Trade.

In addition to these basic glass cutting tools, Dortech Direct Ltd also offers specialized glass cutting tools, such as circle cutters, glass scoring tools, and glass pliers. You may also see ‘variable pitch’ hole saws on sale for similar heavy-duty workloads - this indicates an irregular distance between teeth, and can help lower overall vibration/noise, eject removed material faster, and reduce overall wear on the tool. An alternative configuration of hole cutter designed for use on ceramic tile, porcelain, glass and masonry is the toothless or ‘coated’ hole saw. A set of three high speed steel bits which are ideal for drilling holes in a variety of materials, especially thin sheet metal, fibreglass, upvc and most plastics.Some hole saw designs also feature an arbor or pilot bit (either built-in or removable), which protrudes through the hollow centre of the hole cutter. As implied by the name, a hole saw is made to cut a circular hole of much wider gauge through a workpiece than standard drill bits can create on their own. Generally speaking, the teeth on most masonry hole saws (sometimes referred to as ‘core drill bits’) will be more widely spaced than timber versions, and often diamond-tipped teeth for extra hardness and cutting power. The manual glass cutter features a cutting wheel that is advanced along the surface of the glass to make a score line.

The boring edge usually consists of a circular arrangement of sharp teeth, machined around the full perimeter of the open cutting end of the bit. A versatile holesaw set, perfect for drilling holes at variable diameters in masonry, brick, plasterboard, plastic and tiles. Many hole saws and hole saw kits therefore come with arbors or pilot drill bits pre-packaged as an extra feature, but almost all are compatible with standard arbors and other hole saw accessories if not.Diamond glass cutters are known for their precision and durability, making them a popular choice for professional glass cutters. They’re generally quite inexpensive and widely available, and they feature prominently in both professional and hobbyist tool boxes across a broad range of industries and applications.