Mitre saw (handsaw)

A miter saw (mitre in British English) is a saw used to make accurate crosscuts and miters in a workpiece.

A power miter saw, also known as a drop saw, is a power tool used to make a quick, accurate crosscut in a workpiece at a selected angle. Commonly used for cutting of molding and trim. Most miter saws are relatively small and portable, with common blade sizes ranging from eight to twelve inches.

The miter saw was invented by Ed Niehaus, a tool designer for Rockwell, in 1964. The miter saw showcased several innovations still found today: radial arc spring action, blade braking and dust collection. Rockwell did not patent the design, leading to a large number of manufacturers and innovation improvements.

The miter saw makes cuts by pulling a spinning circular saw blade down onto a workpiece in a short, controlled motion. The workpiece is typically held against a fence, which provides a precise cutting angle between the plane of the blade and the plane of the longest workpiece edge. In standard position, this angle is fixed at 90°.

A primary distinguishing feature of the miter saw is the miter index that allows the angle of the blade to be changed relative to the fence. While most miter saws enable precise one-degree incremental changes to the miter index, many also provide "stops" that allow the miter index to be quickly set to common angles (such as 15°, 22.5°, 30°, and 45°).

There are several types of miter saws:

Miter saws are dedicated cross cut saws, long rip cuts are not possible.

A laser guide provides a precise visual indication of where the cut will be positioned on the workpiece in the current configuration. Some models provide a single reference line for one side of the , while others provide two lines to reflect the total kerf width. A blade guard is a cover for the teeth of the cutting blade. Most modern miter saws have self-retracting blade guards, which automatically retract when the saw is lowered onto a workpiece and re-cover the blade when the saw is raised. It is very dangerous to use the saw if these guards are removed or damaged. A dust bag connects directly to the saw, and helps to collect sawdust away from the workpiece during cutting. Optionally, many manufacturers sell adapters to connect an industrial vacuum cleaner in lieu of a bag to capture more of the dust and simplify disposal. Dust removal with these saws is notoriously poor. A safety clamp helps to lock a workpiece into position prior to making a cut. This is an especially important feature when cutting smaller workpieces (eight inches or smaller). The miter table is typically less than 24" in diameter. Typically, the work will need to be supported on the far end to stabilize the piece while cutting.

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Wikipedia