How to cut the perfect circle...

Jul 27 2016 0 Comments

A circle is the set of points equidistant from a given point. The distance from the centre of a circle is called the radius, the perimeter of a circle is called the circumference, and the diameter of a circle is the distance from one side to the other. As such, all points on the circumference of a circle are therefore equidistant from its centre. The word circle derives from the Greek word kuklos, meaning ‘hoop’ or ‘ring’. 

The actual circle has been known since before the beginning of recorded history, and natural circles would have been observed right back then – such as the Moon and Sun.

The circle is also the basis for the wheel, which with related inventions such as gears, makes a lot of our modern machinery possible today. And early science, particularly geometry, astrology, and astronomy, was connected to medieval scholars - many of whom believed that there was something intrinsically "divine" or "perfect" that could be found in a circle.

Moving through history though, and into the age of construction, people have been searching for years for easier ways to cut the perfect circle in all sorts of material, from wood to stone. And there are plenty of ways nowadays, just look on the internet – how to cut a circle with a jig saw; how to cut a circle on a table saw; how to cut a circle with a router; etc.

But did you know right here at Piranha Tools we offer another solution, well several solutions actually – circle cutters that are used with your power drill, drill stand or drill press…!

The Japanese brand of Kanzawa Circle Cutters that we import into New Zealand offer you the ability to cut perfect circles in plywood, fibre cement, plaster board, plastic, aluminium, stainless steel, and iron, and in a large range of diameters and depths.


There are single and double blade cutters, some that are Titanium coated, some that come with safety covers, and most have Tungsten Carbide tipped blades. They’ve been manufactured for over 50 years and they’re all easily adjustable with the wing nuts on each unit.


So if you are looking for something to cut a perfect circle, check out our complete range first – there just might be something there that suits your needs.

Cheers, Stu

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