Bar/blade size
The largest tyre size (in chain saws) or disc (in circular saws and some others, see "Device") that is allowed for this tool. Tyres are sized by working length, rims by diameter.
A larger bar/wheel allows for deeper cuts but requires more powerful motors. Therefore, this parameter cannot be exceeded — this can lead to an overload of the engine with all the corresponding troubles. However, in many models with a disc it is physically impossible to install a nozzle with a diameter larger than the maximum allowable.
Also note that saws with similar bar/blade sizes may differ in maximum depth of cut (mostly due to differences in design or power). As for the specific dimensions, they depend on the type of saw (see "Device"). For example, large discs of
450 – 500 mm are found exclusively in stationary chain saws, the maximum figure for cutting models is
400 – 450 mm, for trimming —
300 – 350 mm, and sizes of
500 – 550 mm or
more clearly indicate that speech It's about a chainsaw chainsaw bar. Detailed recommendations regarding the choice of a tool for a given size can be found in special sources.
Cutting depth
The greatest depth of cut provided by the saw.
In most types of saws (see “Device”), the depth of cut directly depends on both the engine power and the size of the tyre / disk. The specifications give a value for the maximum allowable size of the working nozzle; when using nozzles of a smaller size, the depth of cut, respectively, will be less. But in band saws, this depth is rather weakly related to the actual length of the tape — it is determined primarily by the length of the open section of the tape, which is directly involved in the work.
Anyway, the greater depth of cut makes the tool more versatile, but comes at the cost of weight, price, and electricity/fuel consumption. So when choosing, it is worth considering the real features of the planned work and the dimensions of the workpieces that are planned to be cut. As for specific values, the most modest tools provide a depth
of up to 50 mm ;
50 – 75 mm is considered a low indicator,
75 – 100 mm is average,
100 – 125 mm is above average,
125 – 150 mm is already quite an impressive thickness, and the most powerful modern saws can have a cutting depth
of more than 150 mm.
Saw angle
The maximum angle at which the working part of the saw can be tilted relative to the vertical. It can be indicated not only for stationary tools, but also for manual ones — in the event that the design provides for a support platform. It is worth paying attention to this parameter if you have to deal with oblique cuts: making such cuts by setting the saw to a certain angle is much more convenient than adjusting this angle manually.
Size
General dimensions of the saw. For a stationary tool (see "Type"), this parameter determines primarily the amount of space that will be required for installation; problems with this can only arise in very tight spaces, so in most cases the dimensions of a stationary saw do not need to be given special attention. In the case of hand-held models, the small size makes it easier to work in hard-to-reach places and improves overall usability. On the other hand, a compact tool inevitably turns out to be low-power; and some jobs by definition require large, heavy saws, with large bar lengths or blade diameters.
