The by-effect is caused when the blade catches the object and violently the jets it again with the back of the saw, towards the operator. It can be thrown very hard and can wound the operator. It is not rare that the object has high enough speed to become built-in in a wall or to cause other damage or damage.

* The blade must be pointed and clean. The beginners often do not identify the importance to use a clean and pointed blade. To launch the preparing on a blade increases friction considerably and decreases the quality of the cut, causing the burn. Launching also increases the probability of the by-effect.

* The saw must be aligned. The blade must be adjusted so that it is parallel with the grooves of mitres and the barrier of tear. If the blade is out of the parallel, it is possible that the object is gripped between the blade and the barrier of tear, which will cause the violent by-effect.

* To employ the guard of blade if possible. The guard of blade on the typical American saws of the market incorporates a spacer called a knife tearing it, that the assistances prevent the cut of closing on the back of the web. The normal tension can exist out of wood which makes close the cut. Some guards of blade have devices of anti-by-effect which allow only the voyage forwards after the blade.

* To push the object after the blade. Not to release an object until it is after the blade and is removed saw. To turn the saw to far before removing small cut out pieces.
* To always maintain the order. Not to carry out a cut where you do not have the complete ordering of the situation. To make sure that there is no obstruction. Not to cut an object which is too large to handle.

* Not to use the barrier of tear like guides during the crosscuts. If you must make a series of the equal crosscuts length, to thus employ a block of stop in front of the blade the object is not in contact with the barrier of tear during the cut. It is easy for the object to twist out of the perpendicular at the end of the cut and to thus obtain caught by the blade and the so-called jeté.

* To pay attention about the straws in wood. The cut by a loose node can be dangerous. The cut of a council deformed or twisted along the barrier of tear is dangerous because it can obtain pinch between the barrier and the blade.