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Module one: History and Safety
Module four: Specialist Electricians Tools
Module three: Core Electricians Tools
Module three: Core Electricians Tools
Power Tool Accessories.
Hole Saws
A hole saw is a saw that is in the shape of a circle. It is used in a drill to cut holes in thinner materials.
The main body of the saw is made from steel with a band of hardened high speed steel electron beam welded to the end, into which the teeth are cut (this is commonly known as Bi-metal construction).
The teeth on the C.K hole saws are what is known as vari pitch – this means that the teeth have a variety of different pitches (see the saws module!). They are done like this to make them suitable for cutting through different materials such as steel, stainless steel, die cast metals, nail embedded wood, hardwood, softwood, plastics etc.
Slots in the side of the holesaws are provided for getting the slug of material out once the hole has been cut.
C.K holesaws are available in over 30 sizes covering diameters from 16 to 152mm.
Holesaws have to be used in conjunction with an arbor.
This screws in to the back of the holesaw and provides both the drive for putting in the drill chuck and the pilot drill which is used to keep the holesaw cutting in one place.
C.K Arbors are available in both hex and SDS drive formats.
The arbor can be unscrewed from the holesaw and easily attached to another size of holesaw.
It’s worth noting the drive pins on the Arbors for the 32 to 150mm size holesaws.
These engage with holes in the back of the holesaw and provide the turning force for the holesaw. Without them the holesaw would tighten on the thread during use, to the point that it would be virtually impossible to get them apart again.
If access is a problem, the whole drive assembly can be extended by 300mm using the extension bar.
The hole enlarging adapter is a great accessory which allows the nesting of one holesaw inside another for concentric enlarging of existing holes. With the larger holesaw attached to the arbor, replace the arbor pilot drill with the T3216 adapter – any smaller size of holesaw can then be nested inside.
To see exactly how easy and useful the hole enlarging adapter is, watch the video below:
