A circular saw is equipped with a circular blade driven by a motor from 1000 to 2500 Watts
Weight: usually between 3.4 and 7 kg.
The power of the motor maintains the blade rotation at a high speed: 3,780 to 5,900 rpm.
On / off controls are triggered.
The diameter of the blade varies according to the model. It determines the maximum depth of cut.
Blade diameter (in mm)
Cutting capacity (in mm)
The upper part of the blade is enclosed by a fixed casing integral with the engine block.
A movable casing covers the lower teeth. It is retracted in the fixed housing as the saw operates.
A divider knife prevents jamming of the blade during operation.
At the end of the cut, a return spring returns the movable casing to its initial position and protects the blade from moving until it stops completely.
A safety switch prevents unintentional running.
The circular saw is held with 2 hands by a large rear handle (which incorporates the trigger) and a palm handle at the front.
An exhaust port for the sawdust , connected to an external suction, makes it possible to clear the cutting line and to preserve the machine by reducing the heating.
Some circular saws are equipped with a laser cutter (such as levels) that guides the cut with optimum precision.
The sole tilts from 0 to 45 ° for the beveled cuts. With parallel guide, sliding and removable.
2 Types of blades
The blade of a circular saw is mounted on the motor shaft by a central hole , or bore. A locking device for the motor shaft facilitates the changes.
The diameter of the bore varies from 16 to 30 mm , depending on the model.
The higher the number of teeth, the finer and more accurate the cut. The blades on our machines have 10 to 24 teeth.
10 teeth : multi-toothed saw blade made of hardened steel for roughing, cutting …
12 to 24 teeth : Flat-toothed blade (tungsten carbide pellets) suitable for most jobs.
48 teeth : for melamine or laminated panels.
The circular blades often have small slots (4 in general) which originate at the base of the teeth. They prevent possible deformation in the event of heating.
The blade cuts upwards: the arrows indicate the direction of mounting. The bore and the number of teeth are always mentioned in addition to the diameter.
3 Uses and power of a circular saw
The choice of the circular saw is made according to the use that it has and the power.
Classes of use
There are three classes of use of a circular saw.
Occasional : Soft wood and derivatives (agglo, plywood, MDF).
Regular : ideal for hardwoods (local or exotic), the pieces of framework. Click here to see some examples of saws.
Intensive : extensive work on all types of wood.
There are two power ranges for circular saws.
Less than 1,200 W.
1200 W and more.
For certain uses, there are particularly suitable saws.
For professional use : circular saws from the “Build & Renovate” range.
For plunging cuts in wood, plastic, metal: double-blade saws are good
For structural joints , the large carpentry: the “2 in 1” saw, with a cutting height of 200 mm. It is equipped with a short chainsaw chain in addition to the circular blade.
Good to know : the circular saw is by definition a powerful machine. Read the recommendations in the instructions carefully.