Circular saw. Types and construction. How to choose and features
Circular saw, or circular saw, is a tool for cutting various materials by sawing with a disk with teeth. Mainly used for carpentry and joinery work.
Handheld devices consist of a body with two handles, which houses the electric motor. A toothed circular saw blade is mounted on the motor shaft. The saw blade that protrudes from the body is covered by a guard. During sawing the guard is pushed back by the workpiece. After sawing is complete, the cover is retracted by a spring.
The stationary saw has a table instead of a compact housing. The motor is secured underneath so that part of the saw blade protrudes through a slot in the tabletop. The circular saw blade can be mounted on the motor shaft or connected to it by means of a belt drive.
The difference between manual and stationary saws in terms of convenience and functionality
Hand-held portable circular saws and table-mounted stationary circular saws differ in their ease of use for different types of work. One tool is better for some applications, the other for others. That’s why there is no one type that has a distinct advantage over the other.
Features of a bench-mounted circular saw
The stationary circular saw is workshop equipment. It can be used for more than one type of job. The presence of the table, as well as the use of various accessories, allows for high precision when cutting.
- Cutting of small slabs of sheet material.
- Cutting of boards, slats, bars.
- Make tongue and groove joints.
- Sawing firewood.
To do such an extensive amount of work on a circular table requires the use of a number of other attachments in addition to the parallel stop. In this case, the functionality of the table depends largely on the size of its tabletop. If the material does not fit on it, then many types of work becomes excessively difficult or nearly impossible. In addition, since the workpiece must be lifted onto the table for cutting, the work with large-sized lumber has to be done by two operators.
Tabletop circular saw can be used for cutting firewood. Use it to cut thin tree trunks and branches into short wood chunks. For these purposes, you usually buy the cheapest tool that does not support the function of adjusting the output of the disc, changing its angle.
Features of a manual circular saw
The manual circular saw is a mobile tool. It is lightweight, so it is used on construction sites where precise sawing is required.
Mobile circular saw takes up little space and costs less. Thanks to the parallel stop, it can be used to saw long timber lengthways. Beveled cuts are possible in this application. Generally speaking, this tool can handle much larger workpieces than are possible with a circular table. The mobile saw can be lifted onto the roof to make beveled rafters or beams on site.
With the depth of cut setting, it is possible to make a quartering or a longitudinal groove. But such work is limited by the capabilities of the side stop. Despite many limitations in terms of precision and functionality, mobile circular saws are bestsellers. They can be retrofitted. In particular, they can be mounted on a homemade table, thus turning it into a full-fledged stationary machine. By modifying the circular saw in this way, it can be used for precision cutting, tongue and groove joints, and beveling workpieces.
Technical data of circular saws
Even with a similar design, the various saw systems differ in a number of technical details. Each parameter is important because it directly affects the ability to perform certain tasks.
- Disc diameter.
- Cutting depth and blade tilt adjustment.
- Soft start.
The blade is the part of the saw that is directly involved in cutting. The diameter of the blade determines how thick the workpiece can be cut with this particular tool. This is very important if you plan to use it to cut thicker beams or wooden posts for fences, for example. Depth of cut of angle grinder is a little less than half of disc diameter.
Table circular saws can have a blade diameter of 400-500 mm or more. Such equipment is specialized and used for cutting thick lumber, as well as for sawing logs into boards. The most popular tabletop models are rarely equipped with saw blades larger than 210 mm.
As for manual circular saws, the diameter of their saw blade is mainly up to 210 mm. It is also equipped with a heavy and powerful motor, which makes it difficult to carry and use. For example, a saw with a 335 mm blade has an average weight of 13 kg. At the same time the tool with 165 mm saw blade weighs 3,5 kg. Often mobile circular saw is equipped with a blade with diameter of 160-190 mm, which gives the required level of maneuverability during carrying and working. A tool with these parameters can cut deep enough and is quite manageable.
Power is one of the main criteria in choosing a tool. But a newly sharpened saw blade can cut better, even with a low-powered motor, than a high-powered tool with worn-out accessories. Thus, the lack of torque strength can be compensated for with consumables. It is necessary to decide beforehand whether to overpay for a powerful circular saw once or to sharpen disks more often afterwards.
Circular saw with a motor up to 800 watts can be used to work with plywood, thin slats and boards. The tool with motors 800-1200 W is the most universal. It can easily cut almost any lumber, but when sawing thick workpieces does it slowly. When choosing a benchtop circular saw it is better to choose a motor from 2 kW. In this case it will have enough power for any type of work. In this case, its weight does not matter, because the table is always standing in the workshop.
When buying tools, many customers first of all pay attention to the cost. Which is understandable. Not every our compatriot has the opportunity to throw away a few extra thousand, even when it comes to buying a saw for home. Besides, a home handyman just doesn’t need high power and great functionality. Therefore, the purchase of a budget circular saw can be called a good decision. Let’s start with inexpensive tools that have everything you need in them.
The review opens with an inexpensive, but good model of circular saw, which has a fairly high power. 1250 watts is enough to quickly and easily cut through even hard, dried out wood. It’s nice that the saw is equipped with an extra set of brushes. Weight of only 4.1 kg makes transport easy, making work really easy and comfortable. A blade speed of up to 5600 rpm makes it possible to produce even large quantities of boards, cants and other lumber in a very short time. Diameter of the disc is 185 mm, which gives a cutting height of 64 mm. All these features add up to make it a very good value. At least if it’s not the best budget saw model, it certainly is one of those.
A very good budget saw. It can be easily purchased by any countryman who regularly saws planks and other lumber. Its power is 1600 watts, so it can easily and quickly handle not only wood but also other materials, including aluminum. Speed of the disc is rather high. 4500 rpm, which is considered an excellent indicator that allows you to quickly cope with significant amount of work.
One of the most important parameters of any circular saw is the diameter of the cutting disc, so you should definitely pay attention to it when choosing a tool.
This model has a blade diameter of 185 mm, which is one of the most common values for a budget electric tool in this category. Weight of the device. 4.9 kg, which should be considered when buying. Not all users will be comfortable to work with it.
- High power;
- Low cost;
- Well-designed dust-removing system;
- Easy adjustment of cutting angle;
- Long warranty (5 years);
- Small dimensions;
- Advanced safety system.
ELITECH PD 1600L
A chic tool. Reliable, easy to use and not overpriced. If you need a circular saw at an affordable price, then you will not regret such a purchase. The weight is quite large. 4.8 kg, but the corresponding power. As much as 1600 watts. Of course, if you have a quality disk, the saw can easily cut the hardest boards, beams and more. Diameter of the disk is large. 190 mm, which provides a cutting depth of 65 mm. This is one of the best indicators among budget circular saws. Very thick boards can be handled without difficulty. Speed of rotation per minute up to 5000 rpm. Of course, any material is cut smoothly, without the slightest burr, splinter, and other imperfections that are often encountered when working with less fast tools. An additional plus is the laser marker, as well as the ability to connect a vacuum cleaner. No more time and effort to remove small sawdust after work.
- High power;
- Possibility to connect a vacuum cleaner;
- It is equipped with an additional disc;
- Rubberized handle;
- Laser pointer.
What you need to know about the circular saw base?
When choosing a circular saw, it is worth paying attention to its base. As a rule, if the budget allows, professionals advise to opt for a molded sole rather than a stamped one. It is characterized by higher rigidity, stability and durability. But there are some important nuances. For example, the thick steel die is almost as good as the cast versions in terms of its characteristics. Besides, if the tool is not to be installed in a stationary position, the rigidity requirements to the sole of the tool are also lowered.
Before buying any tool you like, it should always be tested. You will hardly be allowed to saw something, but it is necessary to hold the saw in hands, turn it on, assess the noise and vibration level.
What is a circular saw
Simply put, a circular saw is a machine with a circular saw blade fixed to the shaft.
The saw can be hand-held, meaning it moves over the material to be cut, or table-mounted (the material moves on a table with the saw attached). The circular saw can be equipped with longitudinal and transverse guides, which serve to make a precise, straight and clean cut.
Manual circular saws are primarily suitable for horizontal work, with the base plate lying on the material to be cut, but you can also make vertical cuts. This ability depends on the weight of the model, since the saw must be held in the hand by weight.
Circular saws are widely used. Whether installing wood floors, cutting tiles, for small wooden buildings (shed, garden house). They are used for straight cuts in solid wood, cardboard, plexiglass and aluminum profiles. These saws are ideal for making precise longitudinal and bevelled cuts. Precise work should be done with a guide bar.
For whom it is intended?
Circular saws are excellent tools for working with wood. And now you don’t have to be a professional carpenter or carpenter to successfully use this tool in many applications. In this review we have looked at hobby class saws that are suitable for general purposes and use up to 1000 hours a year. For higher demands you should of course choose saw blades from the more expensive segment, focusing on their features depending on the job at hand.
Circular saw blades
The blade is the most important part of circular saws. For finer cuts that require greater precision and quality, use a blade with more teeth. If speed is more important than quality, choose a blade with a lower blade density.
- Diameter of the blade Always buy a blade with a diameter according to the manufacturer’s recommendations. Use blades specifically designed for a certain type of saw: circular, plunge-cut, table saw, end trimmer or trimmer. Do not use a blade larger than the specified maximum diameter of your saw. Less than recommended discs should not be used either, as the tool’s safety features will not work properly.
- Blade thickness This parameter affects both cutting speed and material cross-sectional quality. The thinner the blade, the better and faster the cut. On the other hand, a thin blade is prone to vibrations, waves and overheating. Saw blades are most often 1.5 to 3.5 mm thick. The thinnest blades are used in mitre saws to cut bars and thin sections quickly and cleanly. Thinner blades are also used in cordless saws because their use reduces battery power consumption and extends battery life.
- Number of teeth The more teeth on the blade, the cleaner the cut, but the cutting speed is slower. Fewer teeth mean faster cutting speeds, but reduce cut quality. Also the number of teeth of the saw blade depends on the type of material being cut. For example:
- Longitudinal sawing in hardwood requires fewer teeth for faster sawdust removal;
- More toothed blades are better for cross-cutting boards;
- Board cutting Chipboard and laminate require more teeth for a clean, burr-free cut;
- The harder the material, the more teeth the blade should have.
- Tooth material Most saw blades are made of carbide. They offer high cutting quality and long life of the sharpened blade. These discs can be sharpened several times. Less popular (more precisely applicable for certain tasks) are blades made of high-speed tool steel HSS.
- Tooth pitch
- The positive slope is designed for cutting hardwood;
- Negative slant. For non-ferrous metals and laminated panels.
- The alternating tooth shape is necessary for fast and precise cutting of wooden workpieces
- Hollow tooth shape for precise, clean cuts in chipboard and laminate
- Trapezoidal tooth shape. For cutting non-ferrous metals, plastics and composite materials
Various holes and notches are used to dissipate the heat generated by friction. There are also discs coated with a thin layer of Teflon to reduce friction in the cut and prevent the blade from overheating.
7 Best Mini Circular Saw with Laser
How to cut with a circular saw
Working with wood is one of the favorite activities of every handyman. And knowing how to handle a circular saw is therefore a must. Let us show you a little about how to work with it so that you can be as productive as possible while being as protected as possible.
Do we need high speed??
Engine power and blade speed are decisive factors in how fast a circular saw becomes productive. The rotational speed also influences the quality of the cut. But please note that the optimum cutting speed also varies depending on the material to be cut. So, it is better to cut low melting point polymers at slow speed (so as not to melt the edges) and high speeds for hard wood and fiberboard.
Hardwood and hardwood panels are cut at high speed
Speed regulation is used for the targeted adaptation to the material in question. In other cases, this option remains unclaimed. That’s why circular saws often have only one idle speed, around 5,000 rpm. So the advice for dacha owners, who do not tend to the heights of sawing creativity: buy one-speed saw.
Types of circular saws
It is important to determine even before buying, what the unit will be used for. On how to choose a circular saw, you should think at the beginning of the activity. After all, repairs are not made in one hour as a result of a spontaneous decision. It is worth thinking about what kind of tool to stop and what parameters will be the highest priority.
Submersible circular saw
The cutting accuracy is poor. But a different piece of equipment can remedy this situation. The circular saw differs from the classic variations. The difference is that the machine allows you to observe the position of the blade in relation to the workpiece. Not knowing how to choose a circular saw for the home, you should not rush to buy. Need to master the material in detail.
When switched off, the blade is fully insulated. It is under a protective cover, and when the machine is activated it is lowered to continue working.
The scope of immersion saws is repair work in relation to flooring. Accuracy of equipment is measured in millimeters. Depending on the functionality of a particular tool at an angle of 90 degrees, the depth of cut is performed 10-75 mm.
The plunge-cutting tool is characterised by its multi-functionality. It is configured to perform a transverse as well as a longitudinal cut. However, there are difficulties in cutting small widths of workpieces.
Cordless circular saw
The most compact and oversized models used for working at height. They are suitable for work in hard-to-reach places. Tools of this type are designed for short periods of work, their functionality depends directly on the necessary charge.
The equipment is powered by battery. Depending on its type and capacity, the charge is enough to work for 15-50 minutes. The tool needs to be charged as it is operated. Many models have a minimum charge time of 4 hours.
Because of design considerations, battery-powered equipment cannot be used for extended periods of time. Therefore it is not recommended for large-scale activity.
Circular saw for metal and concrete
Typical circular saw variations are not suited for metal and concrete work. Their design does not withstand a considerable load, so the equipment breaks down. For this case, there are manual and specialized device.
Handheld tools are powered. It is characterized by increased efficiency, significant power and speed, productivity. The equipment operates from a wall outlet or battery. Handheld saws are more often purchased by customers due to their low cost compared to an automatic device.
Specialized equipment is available for work on complex construction sites. These are wall saws, wire cutters, and floor saws. Their scope is large construction projects. These tools are characterized by their high level of precision, multitasking ability, and excellent performance parameters.
Stationary circular saw
This tool is perfect for owners of small home workshops. Saws with excellent performance parameters make cuts of 50-140 mm, which depends on the type of workpieces and the model.
The peculiarity of the tool is that it has a bed. In some units it has a prefabricated design that allows the unit to be quickly relocated. For the more solid models a cast bed is used. Considerable weight and dimensions, good stability. This format is used for larger workpieces.
The stationary circular saw is endowed with such advantageous indicators:
- Reduced vibration of the tool thanks to which the quality of work pieces is increased many times over.
- Low noise level.
- Precise settings for machining.
- Maximum range of workpieces, including large-sized workpieces.
- Stationary tools have a dust collector that reduces debris and waste.
Circular saw with guide rail
The tool is equipped with rails to make a precise, even cut. They enable the parts to be processed as quickly as possible.
The guide bars are available as single- and double-sided. The former are used for cutting angular workpieces, the latter for working with complex parts. Depending on how they are used, these can be distinguished:
- Universal. Characterized by maximum design simplicity and high functionality. Suitable for all types of saws, from circular to hand-held.
- Specialized tires. For use on difficult terrain. Mounted exclusively on circular saws.
- Cross-cutting guide bars. The simplest version of a fixture that allows you to cut workpieces at 45 and 90-degree angles.
The tire must be of high strength. No deformation, stability important.
The best circular saws are a key element in almost every tool set, thanks to their ability to make fast and precise cuts in a wide variety of materials, but they come with a number of features, and vary widely as well, so we’ve rounded up the best circular saws on the market right now to save you hours of research.
When it comes to choosing the best circular saw, it is important to keep in mind the type of work you are going to use it for, as well as how often you are going to use it.The best cheap circular saws tend to have fewer features that would be useful for long or complicated jobs, but they are more than enough for a number of simple household chores. But if you’re going to be working on hard materials or your circular saw will be used regularly, then using one of the better circular saws with more power and durability will prove to be much more beneficial in the long run.
Next, you will need to choose whether you want a cordless circular saw or a battery-powered saw.The best mains-powered circular saws offer more power at a lower price than comparable battery-powered counterparts. Until recently, they were also much more suitable for long cuts in harsh conditions because you didn’t have to worry about battery levels, but technology is catching up. Cordless circular saws are still very useful if you need to cut in places where there is no outlet, but corded circular saw models tend to be a little more useful because of their ability to provide more steady power.
The best circular saws are usually rated for current, with 15 amps being pretty standard. Although you will find affordable amp models and usually at a lower price, the loss of performance is not worth the savings, especially if you are investing in a tool that you expect to use for years to come.
If you’re looking for the best circular saw for plywood, it’s worth noting that much of the performance of a circular saw depends on the blade itself, and most come with a blade designed for rough cutting construction wood.For a smoother cut in plywood, use a blade with 80 teeth. Smaller teeth reduce chipping and provide a smoother edge.
If you need other household items, check out our guide to the best cordless drills.
The DeWALT DWE575 is an easy-to-use circular saw with an ergonomic design and great features.
Weight: 8.8 lb | Dimensions: 16.25 x 10.13 x 8.94 in | Speed: 5200 rpm
The DeWALT DWE575 is a versatile circular saw that is a good update to previous popular DeWALT circular saw models. With the DeWALT DWE575, you get an increased degree of bevel and improved design. All within a reasonable price range! While it may be twice as expensive as real budget models, it offers enough features to compete with more expensive models for a place in a professional tool kit.
With its powerful 15 A motor, robust power cord and ergonomic design, the DeWALT DWE575 circular saw has been carefully designed to handle long and demanding jobs. With a weight of only 8.8 pounds and features such as a built-in dust collector, it’s also very pleasant to use. It also comes with a decent three-year warranty, which will help you make the most of this saw.
The Makita 5007MG circular saw has a wide range of professional features and an exquisite finish.
Weight: 10.6 lbs | Dimensions: 12.5 x 10.375 x 9.5 in | Speed: 5800 rpm
The Makita 5007MG may be the most expensive model on the list, but it also has the most extensive list of professional features. From its high-strength magnesium components to its powerful 15A industrial motor, this circular saw creates clean cuts and is light enough to not hurt your wrists when working long hours.It has features you often find on other saws, like a built-in dust extractor and useful features like built-in LED lights to illuminate the cutting line.
The Makita 5007MG circular saw also has one of the best blades, the Premium Ultra-Coated 7 1/4-inch framing blade with carbide tips, so it can easily cut through even wood with nails. With its high-end blade and powerful motor, the Makita 5007MG can easily handle a wide range of jobs, whether it’s dense structural panels or framing walls, floors and roofs in a variety of wood sizes.
The Milwaukee 6390-21 is a professional-level saw with a good feature set and an impressive five-year warranty.
Weight: 10.4 lbs | Dimensions: 19.6 x 17 x 10.7 in | Speed: 5800 rpm
Locking switch for extended use
The Milwaukee 6390-21 was a competitor in the best professional circular saws category, but it was just marked for publication because of the Makita 5007MG’s added level of improvement.Nevertheless, the Milwaukee 6390-21 is still a great option for professionals and serious DIY enthusiasts alike, plus it comes with an impressive five-year warranty, so Milwaukee expects this saw to be with you for a while.
This circular saw has an excellent power-to-weight ratio, and the cushioned handle at the top has eight different positions for adjusting any job while maintaining comfort and control. It’s a rugged model that comes with a sturdy carrying case and a 9-foot long power cord, so Milwaukee is definitely focused on professional needs.One thing that gets in the way of this circular saw, however, is that it lacks bevel stops for quick adjustments, but it is still an excellent saw, easy to use.
How to choose a good circular saw?
Before choosing a tool, the master must decide what kinds of work he will perform, how much of their volume, the materials of what thickness will need to cut.
There are many models of the following classes on the Russian market:
- Domestic models are designed for home and garden repairs. Their continuous operating cycle lasts not more than 25 min. Lower price due to lower power level, limited functionality.
- Semi-professional units are considered universal circular saws, as they can help with household and more complex tasks. Characterized by high power, but do not have the same set of options as the professional models.
- Professional circulators are designed for use in industrial environments. They can work uninterruptedly for 1 hour, they saw not only wood but also metal and stone. Characterized by performance, reliability, extended functionality, long service life. Their high power output is reflected in the size and weight of the tool.
Due to the high cost, purchase of professional circular saws is not considered cost-effective for home DIY work. In addition, their size makes it inconvenient to do work in hard-to-reach places.
Circular semi-professional saws cut not only wood, but also stone, metal
According to the type of power circulators are divided into mains and battery-powered. Power grinders have high power, but you can use them only if you have a working socket. If you will be working in the workshop on the workbench, the network model will be ideal.
Cordless units are attractive because they have no wires, can be used for cutting at height, in places where there is no mains electricity. This option is more suitable for builders. It should be borne in mind that the tools, which are powered by the battery, are not designed for use with a disc diameter greater than 190 mm.
According to the type of design there are the following options for circular saws:
- Stationary. These are large machines. They feature high performance, so they’re suitable for work in furniture shops or other manufacturing environments.
- Table saws. Inferior to stationary in power, but more compact, so they are easier to transport. Models are designed for medium-sized jobs. They are recommended to be purchased for construction work in the country house or to perform repair tasks in the home workshop.
- Manual. They differ from the previous variants by the presence of handles on the body, mobility, lower price. Low weight makes them convenient to use on construction sites.
- Submersible. These machines have the saw blade in a casing and do not protrude above the surface. They are designed to solve the problem of poor cutting precision, capable of making grooves anywhere on the workpiece. These saws are ideal for sink hole sawing. Plunge-cutting saws allow the craftsman to accurately cut through laminated flooring.
When selecting the best models in the circular saw rating, the experts did a comparative analysis of the main technical characteristics of the units:
- Power. The value depends on the performance of the tool, the depth of cut. Household saws not more than 800 W. Professional models have a power output starting at 1 m and upwards.2 to 5 kW.
- Diameter of cutting disc. Determines thickness of material being cut. Cutting depth is 1/3 of the blade diameter. Models rated 160-165 mm have a cutting depth of 55 mm. Saws with a diameter of 190 mm can cut 65 mm thick workpieces. Consumables will need to be replaced often, so check beforehand the range of your nearest building stores. Larger or smaller diameter blades are not always available.
- Spindle speed. High speed produces a more precise cut, but the tool heats up quickly, making it impossible to use it for cutting some materials. The problem is solved by the variable speed control, which lets the craftsman adjust the setting to the raw material.
Safety of the circular saw is increased by the presence of the motor brake, and comfort of operation is provided by options such as soft start, spindle lock, angle and depth of cut adjustment. The presence of a guide bar prevents the tool from deviating from the cutting line, guaranteeing its accuracy, reducing the number of chips. Not superfluous will be the presence of a sliding clutch in the design, which eliminates the risk of backfire if the disc jams.
A low-powered circular saw is good for home
What is the best handheld circular saw for household tasks at home and at the cottage?? Summarizing.
Any tool is selected based on the tasks you plan to use it for. So immediately filter out only domestic models and for do not pay extra money for professional.
Types of Circular Saw Blade. Which One Should You Get?
Choose a circular saw with a maximum cutting depth of 50 millimeters.
Decide whether you need a handheld or tabletop circular saw. Sometimes it makes sense to have both: one for carrying and the other for the garage.
If you do not plan to work away from the mains, buy a cordless model.
If you work with more than wood, choose a universal circular saw with interchangeable blades.
Do not spend too much on a powerful tool. 1200 watts is enough for household use.
Determine a set of extra features.
Now you know what saw to choose for your home. To see the catalog and find the right tool for your application, see Circular saws.