If you mean stop/ stick while cutting /
the saw might be too small for the job. required.
The blade could be blunt.
Very wet timber can jamb the blade.
One tip is to cut a wedge hit this in at the rear of the timber
after the timber has passed through the saw about a foot.
AT ALL TIMES KEEP HANDS CLEAR OF SAW BLADE.
Either you are not cutting in a straight line, or the wood you are cutting is not supported properly on both sides of the cut. If the wood bends up or down during the cut, it can bind the blade.
The set on the teeth makes the kerf (width of the cut) slightly wider then the blade so the saw can clear the dust from the cut and the blade won't bind up.
"kerf" cut. Rabbet? Dado? Or just the cut line? Your question is a bit vague as to what type of cut. Kerf is the alternating offset of saw blade teeth. It provides the clearance needed to make room for the rest of the blade to pass through, otherwise it would bind in the cut.
a concrete or masonry blade
It is called "set" in the teeth. It takes a the sawdust out of the cutting surface so the saw will not bind as much.
There are many kinds saw blade, diamond saw blade and carbide saw blade. You should choose the saw blade according to the application, like wood, metal, stone, concrete, wall and so on.
A dado blade. A dado blade is 2 saw blades sandwiched around a number of "chisel" blades added or subtracted to achieve the desired width of the saw cut.
Depends on the manufacturer and if the saw is left or right handed. Normally a saw cuts UP rotating in the opposite direction a wheel would. Click the saw on, without a blade in to see which way the motor turns then put the blade in to cut in that direction.
The size is usually referenced by the largest diameter circular blade which would fit in the saw.
any saw is the opposite of the way the blade spins!
Unscrew the handle to relive the tension on the saw. Remove the old blade, hook the new blade over the pins on the saw and tighten the handle back up.
There is a great new glossary for circular saw blades here: http://www.toolstoday.com/t-saw-blades-glossary.aspx The Toolstoday Saw Blade Glossary defines the many different saw blade terms that you need to know when you purchase, or start working with saw blades.
Rip saw blades require a greater kerf to prevent the pinching of the blade by the stock.