User manual HITACHI C 9BU2

[. . . ] Read through carefully and understand these instructions before use. Screw M6 × 16 Handle Knob Riving knife Hexagonal-socket bolt Wing-nut Wing-bolt Guide Premarked line Guide piece Front scale when not inclined Front scale at 45° incline M4 Screw Lock lever Hex. Symbols The following show symbols used for the machine. Be sure that you understand their meaning before use. [. . . ] Never clamp or tie the lower guard into the open position. If saw is accidentally dropped, lower guard may be bent. Raise the lower guard with the retracting handle and make sure it moves freely and does not touch the blade or any other part, in all angles and depth of cut. b) Check the operation of the lower guard spring. If the guard and the spring are not operating properly, they must be serviced before use. Lower guard may operate sluggishly due to damaged parts, gummy deposits, or build-up of debris. C) Lower guard should be retracted manually only for special cuts such as "plunge cuts" and "compound cuts". Raise lower guard by retracting handle and as soon as blade enters the material, the lower guard must be released. For all other sawing, the lower guard should operate automatically. D) Always observe that the lower guard is covering the blade before placing saw down on bench or floor. An unprotected, coasting blade will cause the saw to walk backwards, cutting whatever is in its path. Be aware of the time it takes for the blade to stop after switch is released. Causes and operator prevention of kickback: ­ kickback is a sudden reaction to a pinched, bound or misaligned saw blade, causing an uncontrolled saw to lift up and out of the workpiece toward the operator; when the blade is pinched or bound tightly by the kerf closing down, the blade stalls and the motor reaction drives the unit rapidly back toward the operator; if the blade becomes twisted or misaligned in the cut, the teeth at the back edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf and jump back toward the operator. Kickback is the result of saw misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below. A) Maintain a firm grip with both hands on the saw and position your arms to resist kickback forces. ensure that the lower guard smoothly and freely. Never use the circular saw with its lower guard fixed in the open position. ensure that the retraction mechanism of the guard system operates correctly. The saw blades body must be thinner than the riving knife and the width of cut, or kerf (with teeth set) must be greater than the thickness of the riving knife. Never operate the circular saw with the saw blade turned upward or to the side. Ensure that the material is free of foreign matters such as nails. The riving knife should always be used except when plunging in the middle of the workpiece. [. . . ] ) In case the hole diameter of your saw blade does not correspond to that of washer (A), please contact the shop where you purchased the Circular Saw. (3) To assure proper rotation direction of the saw blade, the arrow direction on the saw blade must coincide with the arrow direction on the saw cover. (4) Using the fingers, tighten the hexagonal-socket bolt retaining the saw blade as much as possible. Then depress the lock lever, lock the spindle, and thoroughly tighten the bolt. [. . . ]