Abstract: An electric grinding machine includes a spindle to be driven with a motor; a grinding disc attached to the spindle; a cover covering the grinding disc; a window disposed on the cover to expose an outer circumference of the grinding disc; a hinge mechanism joining the window to the cover so that the window freely moves between an opened position and a closed position, said hinge mechanism having a rotational axis disposed on the cover; a gate protruding from the window and having a cylindrical portion concentrical to the rotational axes; a hallowed portion formed in the gate, said hallowed portion forming a passage opening between the cover and the cylindrical portion when the window is closed; a slider disposed on the cover, said slider configured to pass through the passage opening to hold the window in the closed position; and a piston spring urging the slider toward the window.

Abstract: Provided is an electric cutting machine with a dust control function, capable of collecting dust generated during processing concrete or stone materials without deteriorating cutting ability and dust collection ability under various working conditions, mounted with a cutting position designation guide of excellent visibility and usability.

Abstract: An object of the present invention is to provide a dust collecting cover for a grinding cup wheel having both excellent practicality and versatility. A base plate is joined to a body of the dust collecting cover via elastic bodies at a plurality of positions, an adapter for joining an angle grinder is attachably/detachably provided on the base plate, and a portion of the body cover is formed as a sub-cover openable/closable utilizing a magnetic force of a magnet, and the sub-cover is configured to be fastenable to the body cover by a screw inserted via a through hole provided in the magnet into a female screw part provided on the body cover side.

Abstract: Provided is a hand-held electric cutting machine having excellent spark control capability, high stability, good usability and high versatility. A unit having: a first guard which covers a part of a disc-shaped cutting tool; a second guard which covers a part of the disc-shaped cutting tool and is rotatably attached to the first guard; a movable guard which is rotatable around outer peripheries of the first guard and the second guard, covers a part of the disc-shaped cutting tool, and is attached on the second guard; and a protector which covers an outside of the movable guard and is attached on the second guard, is attached to a hand-held electric tool serving as a driving source.

Abstract: An electric-powered cutting machine includes a reciprocable plunger held by and protruding outward from a housing; an operation member capable of being pivoted on the housing; and a blade holding mechanism disposed at a tip end portion of the plunger, the blade holding mechanism causing a blade to be detachably attached to the plunger. The operation member includes an operation portion and an abutting portion, wherein a distance from the operation portion to a rotating fulcrum is longer than a distance from the abutting portion to the rotating fulcrum. The blade holding mechanism is biased and is capable of swinging, and the blade holding mechanism includes a rotating member capable of being pressed against a side of the blade, wherein the abutting portion abuts against the rotating member when the operating member swings, and wherein the blade is detachably attached to the plunger by swinging of the rotating member.

Abstract: An object of the present invention is to provide a dust collecting cover for a grinding cup wheel having both excellent practicality and versatility. A base plate is joined to a body of the dust collecting cover via elastic bodies at a plurality of positions, an adapter for joining an angle grinder is attachably/detachably provided on the base plate, and a portion of the body cover is formed as a sub-cover openable/closable utilizing a magnetic force of a magnet, and the sub-cover is configured to be fastenable to the body cover by a screw inserted via a through hole provided in the magnet into a female screw part provided on the body cover side.

Abstract: An electric-powered cutting machine includes: a housing; a plunger held by the housing and protruding outward therefrom, the plunger being driven to reciprocate; an operation member capable of being pivoted on the housing; and a blade holding mechanism disposed at a tip end portion of the plunger, the blade holding mechanism causing a blade to be detachably attached to the plunger, wherein the operation member includes an operation portion and an abutting portion, wherein a distance from the operation portion to a rotating fulcrum is longer than a distance from the abutting portion to the rotating fulcrum, wherein the blade holding mechanism is biased against pressing means and is capable of swinging, and the blade holding mechanism includes a rotating member capable of being pressed against a side of the blade, wherein the abutting portion abuts against the rotating member when the operating member swings, thereby the rotating member swinging against a biasing force of the pressing member, and wherein the bl

Abstract: An electric-powered cutting machine includes: an electric motor, a housing for the electric motor; a plunger driven by the electric motor to reciprocate; and a blade holding mechanism. The blade holding mechanism holds a blade at a tip end portion of the plunger. The blade holding mechanism includes: a blade receiving face including a groove, a swinging member and a pressing member. The groove is shaped substantially the same as an attachment portion of the blade. The swinging member has one and other ends and pivoted at a swing fulcrum. The one end has a blade pressing portion capable of being disposed to oppose to the groove. The other end elongates to separate from the plunger. The pressing member presses the one end toward the groove.

Abstract: Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission key 7 composed of high-strength plastic is provided between an output shaft 3 and a gear 4, and a plane or a V-groove is formed on each of the output shaft 3 and the gear 4 contacting the power transmission key 7.

Abstract: Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission key 7 composed of high-strength plastic is provided between an output shaft 3 and a gear 4, and a plane or a V-groove is formed on each of the output shaft 3 and the gear 4 contacting the power transmission key 7.

Abstract: An electric-powered cutting machine includes: an electric motor, a housing for the electric motor; a plunger driven by the electric motor to reciprocate; and a blade holding mechanism. The blade holding mechanism holds a blade at a tip end portion of the plunger. The blade holding mechanism includes: a blade receiving face including a groove, a swinging member and a pressing member. The groove is shaped substantially the same as an attachment portion of the blade. The swinging member has one and other ends and pivoted at a swing fulcrum. The one end has a blade pressing portion capable of being disposed to oppose to the groove. The other end elongates to separate from the plunger. The pressing member presses the one end toward the groove.

Abstract: Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission key 7 composed of high-strength plastic is provided between an output shaft 3 and a gear 4, and a plane or a V-groove is formed on each of the output shaft 3 and the gear 4 contacting the power transmission key 7.

Abstract: Disclosed is an electric power tool having a gear mechanism, which reduces a noise by absorbing collision of gears and is resistible to a high torque. A power transmission key 7 composed of high-strength plastic is provided between an output shaft 3 and a gear 4, and a plane or a V-groove is formed on each of the output shaft 3 and the gear 4 contacting the power transmission key 7.

Abstract: A portable circular saw is disclosed which includes a mechanism for simply and efficiently adjusting parallelism of the saw blade to the base. Two connecting members positioned at the front and rear of the saw connect the base of the saw to the saw cover, and the mechanism for adjusting parallelism is part of the front connecting member.