Just about every good carpenter and DIY'er needs a durable, dependable circular saw in their tool collection.  The awesome overall flexibility of the circular saw permits it to do an enormous variety of chores, turning it into one of the most in-demand tools around most wood working shops.  The capacity to change the depth and angle of your cut makes lots of things possible. 
 
There is two main typesof circular saws on the market: in-line circular saws and worm-drive circular saws.  The real difference between them is the location of the motor, which dramatically affects the amount of torque offered.  With a worm-drive saw, the motor is placed parallel to the blade.  This style enables the motor to transfer a large amount of power to the blade, allowing it to cut through a variety of substances, from wood to concrete.  In general, most professional craftsmen use worm-drive saws due to the additional power and flexibility.  Nevertheless, the higher torque and power also ensures they are  more dangerous than in-line saws.  Because of this, it is my opinion that worm-drive saws really should only be used by professionals.  Check out some more info on that topic here: 
[http://circular-saw-reviews.info/porter-cable-pc13csl-review/ her comment is here]

For typical hobby and DIY projects, an in-line (or sidewinder) saw is an outstanding option.  Though in-line saws create less power than a worm-drive saw, most in-line saws should have no problem with almost any project you could give it, other than major industrial construction.  Moreover, they're just safer, lighter and generally easier to use.  Make sure the circular saw you purchase features an electronic brake.  This feature induces the flow of electricity to be reversed once you release the trigger, causing the blade to stop rapidly.  This is an essential and handy safety feature. 

If mobility is necessary to you, you may want to consider a cordless circular saw.  This will allow you to use the saw nearly anywhere, without needing bulky extension cords and a generator.  There are actually a couple disadvantages to battery powered circular saws: they have less torque than their corded brethren, and you are constrained by the runtime of the battery pack .  You are able to purchase additional batteries to lengthen your work time, though you have to remember to keep them all completely charged and ready to go, which is often inconvenient.

Always make sure you consider the kind of work you may be performing before purchasing any kind of power tool.  This is particularly correct with circular saws.  If you find that you change blades fairly regularly, finding a circular saw with a quick-change blade system could save you a lot of time in the future.  If you need deep cuts, you need a saw with a blade depth big enough to meet your requirements.  In addition, you should definitely read some circular saw reviews prior to you making your purchase to make certain you buy the best circular saw possible.

Just like I mentioned at the beginning, every carpenter and hobby woodworker needs a strong, safe circular saw in their tool collection.  The astonishing flexibility of the circular saw permits it to perform an awesome diversity of things, making it amongst the more popular tools around most wood working shops.  The ability to adapt the depth and angle of your cut opens up the door to a variety of possibilities.


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