Just about every good carpenter and hobby wood-worker needs a strong, reliable circular saw in their tool collection. The amazing adaptability of the circular saw allows it to execute an incredible diversity of tasks, which makes it one of the most in-demand tools in most wood working shops. The option to adapt the depth and angle of your cut opens up the door to a variety of possibilities.
You will find two standard designs of circular saws currently available: in-line circular saws and worm-drive circular saws. The main difference between them is the positioning of the motor, that also greatly influences the amount of torque delivered. With a worm-drive saw, the motor is installed parallel to the blade. This configuration enables the motor to transfer a large amount of power to the blade, enabling it to cut through all kinds of substances, from wood to concrete. In general, most pro tradesmen use worm-drive saws on account of the increased power and flexibility. However, the increased torque and power also ensures they are a lot more dangerous than in-line saws. For that reason, it is my opinion that worm-drive saws should really only be used by pros.
If transportability is necessary to you, you might want to think about a cordless circular saw. This will allow you to use the saw nearly anywhere, without needing to haul around a generator and large extension cords. You'll find a couple of downsides to portable circular saws: they offer less torque, and you are limited by the run time of the battery . You can actually purchase additional batteries to stretch out the time you can work, but you will need to remember to make sure they've been completely charged, which can be annoying.
Make sure you think about the kind of work you will be doing before buying any power tool. This is particularly true with circular saws. If you change blades on a regular basis, buying a circular saw with a quick-change blade system will save you tons of time down the road. If you'd like deep cuts, you will require a saw with a blade depth large enough to meet your requirements. Also, you'll want to look at some circular saw reviews before making your purchase to guarantee you get the best circular saw possible.