Real power
The power delivered by the tool motor directly to the cutter or blade. The output power is inevitably less than the power input of the motor.
Note that in the characteristics of tools this parameter is given relatively rarely. However, it is he who most accurately describes the general capabilities of the unit, such as speed, the ability to make deep cuts and cope with hard materials. Therefore, it is best to compare different models with each other precisely in terms of output power.
This indicator also allows you to evaluate the overall efficiency: the higher the ratio of output power to the power consumption of the engine, the more efficiently the tool consumes energy / fuel.
Disc/cutter size
The diameter of the blade/cutter for which the tool is designed.
A larger blade can provide greater depth of cut, but requires a more powerful motor. Accordingly, this parameter is directly related to the power and performance of the tool: the more powerful and heavier the unit, the usually
larger the diameter of the working element in it. Note that some models allow the installation of cutters / discs and a smaller diameter than the standard one, but you cannot install a larger work item.
Rotation speed
The maximum speed of rotation of the disk / cutter provided by the tool.
The higher the speed, the higher the speed of the cutting edge relative to the material, the higher the processing speed and the more accurate the cut is. On the other hand, as the speed increases, the torque decreases. So for the same blade/cutter diameter, higher RPMs will be beneficial on relatively soft materials, while a slower tool will be better for hard and stubborn materials.
Processing width
The width of the furrow that the tool can cut. This parameter is relevant for models with a cutter (see "Work item") and units with several discs (see "Working discs / cutters"). In the first case, the processing width corresponds to the width of the cutter, in the second — to the distance between the discs. This distance can be changed by installing special washers on the spindle; therefore, in many tools, the processing width is indicated by a range, from minimum to maximum.
Cable length
The length of the network cable can tell you how far from the outlet you can operate the device. Therefore, for domestic use, it is more relevant to choose models with a short cord, for construction work or use in production, in the garage a longer cable is better.
Noise level
Approximate noise level produced by the instrument during operation (actual volume may vary depending on performance).
The lower the noise, the more comfortable the use of the tool, the easier it is to work with it without headphones or other noise protection equipment. It is easiest to evaluate a specific volume level using comparative tables. In general, wall chasers and jointers are quite noisy equipment — in most models, the volume exceeds 90 dB (loudness comparable to the sound of a moving freight car at 7 m), and in the most noisy this figure reaches 118 – 119 dB, which is only slightly below the human pain threshold . If the volume is more than 100 dB, it is highly recommended to use protective headphones or earplugs.
