A dust collector for an electric power tool includes a main body case, a tubular sliding portion, and a dust collection portion. The main body case is mountable to an electric power tool. The tubular sliding portion is disposed on the main body case. The sliding portion includes a nozzle on a front end thereof. The nozzle includes a suction opening. The dust collection portion is configured to accumulate dust suctioned from the nozzle. The sliding portion includes a guided portion supported by a guiding portion disposed on the main body case. The guided portion is supported slidably in a front-rear direction, and the guiding portion and the guided portion are disposed in a region on a half side with respect to a line on a cross section passing through a center of the sliding portion.

A dust collector for an electric power tool includes a main body case, a tubular sliding portion, and a dust collection portion. The main body case is mountable to an electric power tool. The tubular sliding portion is disposed on the main body case. The sliding portion includes a nozzle on a front end thereof. The nozzle includes a suction opening. The dust collection portion is configured to accumulate dust suctioned from the nozzle. The sliding portion includes a guided portion supported by a guiding portion disposed on the main body case. The guided portion is supported slidably in a front-rear direction, and the guiding portion and the guided portion are disposed in a region on a half side with respect to a line on a cross section passing through a center of the sliding portion.

A step drill includes a distal end, an opposite proximal end, a drill tip and at least one drill step. The drill tip has a tip at the distal end of the step drill and comprises a first number of geometrically defined cutters, each of which is paired with a first flute and lies on an imaginary first circular line about a longitudinal axis of the step drill. The imaginary first circular line has a first radius. The at least one drill step is arranged at a distance from the distal end and has an end face with a second number of geometrically defined cutters each of which is paired with a second flute and lies on an imaginary second circular line that runs about the longitudinal axis of the step drill and has a second radius. The first radius is smaller than the second radius. The first flutes of the drill tip and the second flutes of the drill step merge in a region, which is arranged at a greater distance from the distal end than the end face of the drill step, and form a single flute.

A tool bit assembly can include a housing comprising a channel at least partially extending into the housing, one or more interacting features in the channel, and a shaft configured to fit within a drill chuck to allow a drill to turn the shaft. The shaft can be at least partially disposed within the channel to rotate and slide relative to the housing. The shaft can include a striking structure configured to interact with the one or more interacting features in the channel to cause the housing to actuate linearly relative to the shaft if the shaft is rotated relative to the housing and the striking structure is positioned to interact with the one or more interacting features.

A tool bit assembly can include a housing comprising a channel at least partially extending into the housing, one or more interacting features in the channel, and a shaft configured to fit within a drill chuck to allow a drill to turn the shaft. The shaft can be at least partially disposed within the channel to rotate and slide relative to the housing. The shaft can include a striking structure configured to interact with the one or more interacting features in the channel to cause the housing to actuate linearly relative to the shaft if the shaft is rotated relative to the housing and the striking structure is positioned to interact with the one or more interacting features.

A vibration assisted drilling system is presented. The vibration assisted drilling system comprises a drill feed motion system having a drill feed axis, an oscillation motion system having an oscillation axis, a drill spindle having a drill bit, and a mounting system configured to connect the drill spindle to the oscillation motion system. The drill feed axis is substantially parallel to and offset from the oscillation axis.

The disclosed device is a fan that is threaded over a cutter, preferably over the shank of such cutter. The bearing portion of the fan is substantially shorter than the length of the shank. The fan contains at least two blades, but may contain three, four or more blades. The blades are at a perpendicular angle with respect to the sidewall of the bearing. The blades are in a horizontal, or if stated differently, in a flat orientation with the bearing. The blades may also be angular both with respect to the previously mentioned flat orientation and more or less perpendicular with respect to the sidewall.

A coated cutting tool includes a body and a hard and wear resistant coating on the body. The coating has at least one NbN layer with a thickness between 0.2 m and 15 m, wherein the NbN layer includes a phase mixture of a cubic phase, c-NbN, and a hexagonal phase, h-NbN.

A coated cutting tool includes a body and a hard and wear resistant coating on the body. The coating has at least one NbN layer with a thickness between 0.2 m and 15 m, wherein the NbN layer includes a phase mixture of a cubic phase, c-NbN, and a hexagonal phase, h-NbN.

An example cordless portable power drill is provided. The drill may include a drill chassis, and a spindle mounted to the drill chassis. The spindle may be configured to drive a working bit. The drill may also include an exit port configured to direct a flow of a substance towards the working bit and an electric motor mounted to the drill chassis and operably configured to rotate the spindle. The drill may also include a pump mounted to the drill chassis. The pump may be fluidly coupled to the exit port, and the pump may be configured to pressurize the substance for output via the exit port to cool the working bit or remove debris created by the working bit through interaction with a workpiece.