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Circular Saws

Circular Saws
 
Circular saws are among the most versatile and widely used of all saws. They allow crosscuts, ripping, beveling and plunge cuts in addition to cutting materials ranging from paneling to framing timbers to cement. There are a few main types of circular saws and a wide array of features to choose from. Before you learn about all the available options, use these questions to get yourself thinking about what you need:
 
What applications and materials will you be using your circular saw for?
Are you more concerned about power and performance or convenience and ease of use?
Will you use the circular saw for extended periods of time, such as throughout a work day?
Will you have access to power outlets? How much freedom of movement will you need?
 

Type, Applications and Design Features


Before you get into more detailed features, you need to decide what type of circular saw you need. The two main designs are worm drive and sidewinder. You also have the option of cordless circular saws and trim saws. Always keep the intended applications in mind as you evaluate the benefits of each type.
 
Worm-Drive Saws: Saws with a worm-drive design can cut studs and plywood all day without a whimper, making them a traditional favorite among some professional carpenters. The motor on a worm-drive saw is located parallel to the blade, delivering enough torque to cut through wet lumber and concrete time and time again. In the case of a worm-drive model, heavy duty also means heavy weight. If you don't really need all that power, your arms and back may appreciate a saw that is lighter to hold and carry. Less common hypoid-gear saws offer power, performance and design features that are similar to worm-drive saws.
 

• Worm-drive saws compensate for diminished speed with increased torque
• With the blade on the left of the motor, right-handed users have a clear view of the cut line
• The rear-mounted handle on worm-drive saws enhances steering control
            


Sidewinder Saws: Sidewinder saws, also known as traditional or in-line saws, are popular on many construction sites and are the overwhelming choice of homeowners. The motor on a sidewinder is perpendicular to the blade, allowing the saw to be lighter but sacrificing some power. If you do plan to use your circular saw for heavy-duty cutting but don't want the extra weight of a worm-drive saw, sidewinders with helical gearing deliver increased torque.
 

• The traditional sidewinder blade-motor configuration delivers a clear view of the cut line for left-handed 
  users
• Some models offer a blade-left design to provide right-handed users with an unobstructed view
• Due to their versatility, sidewinders are available with a wide variety of feature combinations
            


Cordless Saws: Cordless saws offer easy portability, eliminating the need to haul around bulky extension cords or portable generators. For cordless convenience, you'll have to sacrifice some torque, as well as the unlimited run time offered by corded saws. Cordless saws also tend to have a smaller blade diameter than the standard corded size of 7-1/4", reducing the material thickness you can cut, especially if you tilt the blade.
 

• Cordless saws eliminate the danger and expense of cutting through your saw's cord
• A high-voltage battery (18V to 24V) can deliver extended cutting power


 
Trim Saws: Circular saws with a particularly small blade diameter, usually 3-1/2" to 4-1/2", are commonly known as trim saws. Designed for finish carpentry work and other applications that involve thinner materials, trim saws are a smart choice for many crafts and home improvement projects, as well as a variety of professional applications.
 

• Compact and light, trim saws offer easy portability and maneuverability
• Trim saws are available in corded, cordless, sidewinder and worm-drive models


 
 

Type

Blade Diameter

Power

Typical Weight

Key Benefits

Recommended Application

Cordless Saws

5" to7-1/4"

• 14.4V to   24V
 

7.5 to 10 lbs.

•Easily portable with no  need to run extension  cords or carry  generators
•Eliminates danger and  expense of cutting  through the saw's cord

Light- to medium-duty home and professional use

Sidewinder Saws

5" to more than 10"

• Corded   and   cordless   models
• Corded   models: 8   to 15 amps

6 to 10 lbs.

• Lighter than worm-drive   saws
• Available with a wider   variety of features
• Right- or left-mounted   blade options

Light- to heavy-duty home and professional use
 

Trim Saws

3-1/2" to 4-1/2"

• Corded   and   cordless   models
• Corded   models: 4   to 8 amps

4 to 7 lbs.

• Compact and    lightweight
• Reduced fatigue
• Enhanced control and   maneuverability

Jobs requiring shallower cuts, such as finish carpentry work
 

Worm-Drive or Hypoid-Gear Saws

6-1/2" to 8-1/2"
 

• 12 to 15   amps
• Corded   models only

13 to 15 lbs.

• More torque
• Powers through difficult   materials, such as wet   lumber and concrete
• Handles all-day cutting

Extremely demanding professional and home applications, such as framing


Features


Bevel Capability: Beveling capability allows you to tilt the base to make angled cuts. Look for tool-less adjustment and positive stops for improved efficiency and accuracy when adjusting for common angles.
 
Depth Control: The depth of cut is largely determined by the diameter of the blade. Check depth-of-cut specifications at 90° and 45° to determine what blade diameter you'll need for the various thickness of materials that you work with. Look for depth controls that provide good visibility, easy access and simple adjustments. 
 
Visibility: A clear view of the cut line is critical. If you are right-handed but prefer a saw with a blade to the right of the motor, look for a notch in the upper blade guard to enhance visibility.
 
Electric Brake: An electric brake stops the blade quickly when you release the trigger, enhancing safety and helping you get ready for the next cut more quickly.
 
Easy-Change Blade System: Some saws offer one-step blade changes, either with or without the use of a tool. This is especially important to minimize downtime if you switch blades frequently.
 
Rip Fence: A rip fence improves accuracy and efficiency when cutting parallel to the edge of the workpiece. Longer fences, or guides, offer better control.
 
Heavy-Duty Base: Look for a base that can survive a fall. Cast-metal and reinforced-steel bases with ridges resist bending better than flat aluminum or stamped-steel bases, though they can add weight.
 
Magnesium Housing: A magnesium housing protects the motor, extending tool life without adding a lot of weight to the saw.
 
Adjustable Handle: An adjustable handle offers multiple positions for enhanced comfort and control in a wider range of applications.
 
Cushioned Handle(s): Cushioned main and auxiliary handles make long, sweaty projects more comfortable.
 
Dust Management: A dust blower removes dust from the cut line, enhancing visibility, and a dust port allows connection to a shop vac or dust bag to collect sawdust as you cut.
 
Laser Line: A built-in laser projects a line on your workpiece for enhanced accuracy and efficiency on straight cuts.
 
Work Light: A built-in work light improves visibility in low-light situations without the need to drag out or rig up a separate light fixture.
 
Rafter Hook: Models with a built-in hook offer quick, out-of-the-way storage between cuts and projects.
 
Cord Convenience: Long, flexible, rubber cords provide more freedom of movement than short, plastic cords. A cord clip helps keep the cord away from the blade so you don't cut through it, while a detachable cord offers easy replacement. A lighted plug shows you at a glance if the tool is live.