What is a worm drive saw
How to use a worm-drive circular saw 2021 - Todo web media
Circular saws are a staple on construction sites because they are one of the most useful and versatile power tools for building homes, but there are also numerous uses for a circular saw in fine woodworking. For example, a circular saw and a straight edge can cut sheet materials such as plywood just as accurately (and probably more conveniently) than using a table saw. A circular saw can be used to cut grooves to clean half a lap joint, as well as making cross cuts or angled cuts like a miter saw.
Learning to use a circular saw
Using a circular saw safely and accurately takes some practice. Unlike a straight drive circular saw, a worm saw uses a set of gears to connect the saw blade mandrel to the motor. The worm saw is much longer than the straight drive box-shaped model, and the saw blade is on the left side of the saw body so that right-handed people can better see the saw blade as they engage in the cut line.
The trigger guard on a worm drive saw is much lower and behind the motor than it is on a traditional straight drive model. This means that the saw should be held in front of the operator rather than from above. This position of the trigger handle makes it easier to cut sheet material by hand with a worm drive saw, as the natural movement is to move forward with the cut hand rather than pushing the saw up and down with a conventional straight drive model.
Either way, you should have some time to practice cutting with both types of saw before attempting accurate freehand cuts. If you are left-handed, cutting with a worm saw can be particularly challenging because the rear position of the trigger guard does not lean over the saw to see the saw blade touch the cutting line.
Buy circular saw
If you are looking to buy a worm drive circular saw, you need to know that the cost of this type of model is typically around twice that of a straight drive circular saw. For many woodworkers, the difference in price is worth the investment, be it because of the easier view of the blade at the cutting line for right-handed people or because of the position of the handle. Both types of saw can be used to make the same cuts. So it is simply a matter of preference and getting used to the chosen model.
Both the straight drive model and the worm drive can be equipped with a motor with up to 15 amps, depending on the manufacturer. However, the worm drive has the advantage that spiral gears can be used to add more torque to the saw blade to help propel the saw through hard cuts that could freeze the model with the straight drive.
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