Tungsten carbide hole saw with arborA 52 mm (2.0 in) hole saw with pilot bitA 115 mm (4.5 in) diamond hole saw
A hole saw (also styled holesaw), also known as a hole cutter,[1] is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material. It is used in a drill. Hole saws typically have a pilot drill bit (arbor) at their center to keep the saw teeth from walking. The fact that a hole saw creates the hole without needing to cut up the core often makes it preferable to twist drills or spade drills for relatively large holes (especially those larger than 25 millimetres (1.0 inch). The same hole can be made faster and using less power.[2]
The depth to which a hole saw can cut is limited by the depth of its cup-like shape. Most hole saws have a fairly short aspect ratio of diameter to depth, and they are used to cut through relatively thin workpieces. However, longer aspect ratios are available for applications that warrant them. Common hole saw depths are 38, 45 and 60 mm and for drilling through e.g. (angled-) rooftop constructions also a depth 165 and 300 mm[3] is possible.
Cutting with a hole saw is analogous to some machining operations, called trepanning in the trade, that swing a cutter analogous to a fly cutter in order to achieve a similar result of annular kerf and intact core.
^Degarmo, E. Paul; Black, J T.; Kohser, Ronald A. (2003), Materials and Processes in Manufacturing (9th ed.), Wiley, p. 593, ISBN 0-471-65653-4.
^"The 7 Best Hole Saws in 2023 - Best Hole Saw Kit". Popular Mechanics. 2023-05-04. Retrieved 2023-06-13.
^"Long hole saws used for deep and thickwall constructions". Mandrex - Extra deep and long hole saws. 2023-08-15.
A holesaw (also styled holesaw), also known as a hole cutter, is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece...
spinning around an arbor. A holesaw and ring saw also use a rotary motion but are different from a circular saw. Circular saws may also be loosely used...
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bits used primarily to bore holes in softwoods HoleSaw – a large drill bit with a jagged edge, ideal for cutting larger holes (mostly in wood). Drilling...
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very little time; it is also possible to defeat them by drilling with a hole-saw drill bit. Standard tubular-lock drill bit diameters are 0.375 in (9.5 mm)...
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referred to as a pilot hole. Skates, Scott - Saws on (2023-02-09). "How to Drill Pilot Holes (Why, When & Correct Size)". Saws on Skates. Retrieved 2023-06-13...
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through soft materials such as drywall without drilling a hole for the blade. Compass saws typically feature a larger, coarser blade, and are designed...
development of steam-powered sawing machines, saw pits were unnecessary, and therefore were cut up and sold as post-holes. Saw pits were introduced into...
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