A deburring mechanism with a rotatable countersink, a cylindrical shaft, a conical cutting contour and a cylindrical cutting edge configured to mount to a driven workstation shaft so that when a workpiece comes in contact with the cutting edge, burrs are removed from the workpiece. The deburring mechanism has a safety device attached to the shaft and adjacent the countersink. The safety device has a rotationally symmetric body with openings through which removed burrs move, a circular outer guard, a mounting portion with legs and a hexagonal mounting contour corresponding with an interior bore of the driven shaft and configured such that a driving connection of the countersink only occurs when the safety device is assembled and overlaps the transition area with a protective contour.

A clamping device for releasably holding a tool holder shank is formed with an engagement bore in a rear end, and includes a housing having a bore in a forward end for receiving the tool holder shank, a drawbar reciprocally movable inside the housing and which in a forward end is provided with engagement means arranged to engage with an engagement formation inside the engagement bore of the tool holder shank, and which is formed with a drawbar aperture extending through the drawbar in a transverse direction of the same, and a cam shaft extending through the drawbar aperture. The cam shaft includes three cam formations and more precisely first and second spaced apart cam formations, which are journalled in seating apertures in the housing on opposite sides of the drawbar, and an intermediate third cam formation located between the first and second cam formations and positioned within the aperture of the drawbar. The drawbar is insertable into the bore from the forward end.

A selection system, comprising: a sheath defining an internal housing extending in a longitudinal direction; a link rod disposed in said internal housing, and extending in the longitudinal direction; and a selection slide mounted to slide in the internal housing, about the link rod; the link rod being held stationary relative to the sheath against movement in translation in the longitudinal direction by stop means; the system being characterized in that the stop means comprise: a base that is a body of revolution and includes a conical portion; and a shell comprising two shell portions each including a conical portion configured to come to bear in plane manner against the conical portion of the base.

A tool holder for a cutting tool having a tool shank includes a receptacle which extends in an axial direction and a sleeve disposed in the receptacle. The sleeve includes a tool receptacle structured to at least partially receive the tool shank and a blocking element that projects radially into the tool receptacle. The axial positioning of the sleeve is adjustable with respect to the receptacle.

Provided is a cutting tool that implements both high positioning accuracy and simple operation when the cutting tool is installed in a tool rest. The cutting has: a tool a main body which includes a fixing seat fixing a cutting insert or a cutting edge; and a position pin, which includes a cylindrical portion that is used for positioning the main body by being abutted to an abutting surface of a tool rest in a case of installing the main body in the tool rest, and which is detachable from the main body. The main body includes a female screw hole that is provided with a female screw portion and a tapered surface that is symmetric with respect to a center axis of the female screw portion and that widens toward an opening thereof. The positioning pin includes a male screw portion that engages with the female screw portion, and a contact portion located at a connecting portion that connects an end of the cylindrical portion and an end of the male screw portion. In a case where the male screw portion is engaged with the female screw portion and the positioning pin is installed in the main body, the contact portion contacts the tapered surface, and a center axis of the cylindrical portion and a center axis of the tapered portion match with each other.

A safety drilling tool having a tapered drill bit that drills through materials, such as metal, without producing any torque or heat is provided. The safety drilling tool may provide safety for the operator of the tool while drilling or cutting into electrical/electronic enclosures, such as switchgear. The bit may include a smooth graduated cam on the cutting portion eliminate the usage of steps as is the conventional practice in the art. The drill bits may be different sizes to reduce the bulkiness for sake of convenience. The bits may have a one or more internal helical flutes for pushing the debris through the hole being drilled. The hole saw portion of the bit draws the material into the center of the bit until the initial hole is made allowing the debris from the tapered bit to flow through hole being drilled.

The invention relates to a stop for a rotating drilling, milling or countersinking tool which comprises a stop sleeve which is freely rotatably coupled, by means of a sliding or rolling bearing, around the tool. A first bearing bush of the bearing supports the stop sleeve. A second bearing bush of the bearing sits in a rotationally fixed manner on a shaft sleeve. The shaft sleeve can be pushed and fastened on a shaft of the tool. In a secondary aspect, the invention relates to a drilling, milling or countersinking tool having such a stop.

A structure, including first and second portions respectively having a serration in which peaks and valleys are continuous, and configured to adjust relative positions of the first and second portions in an adjustment direction by interlocking the peaks and valleys with each other. The adjustment direction is a direction in which the peaks and valleys of the serration are continuous; a fixing portion configured to maintain a defined state. The defined state is a state in which the peaks and valleys are interlocked with each other and the relative positions of the first and second portions are fixed; and a positioning mechanism provided on the second portion or the fixing portion, and having a contact portion configured to contact the first portion in the defined state.

A chuck jaw stopping mechanism is disclosed for forming a soft jaw for a lathe. An example of the chuck jaw stopping mechanism includes a stopping device. The example chuck jaw stopping mechanism also includes a securement device configured to connect the stopping device on a master jaw of a chuck of the lathe. The example chuck jaw stopping mechanism also includes a lower surface of the stopping device that moves against a portion of an outer circumference of the chuck in a closed position. The lower surface also moves away from the portion of the outer circumference of the chuck in an open position to form a gap between the lower surface of the stopping device and the portion of the outside circumference of the chuck.

A drill guide that includes associated components and various methods of use herein. The drill guide includes a first guide column and a second guide column provided on a base plate. The drill guide also includes a chuck carrier adapted to operatively receive a drill chuck of a portable drill. The chuck carrier is operably engaged with the first guide column and the second guide column, and the chuck carrier is linearly moveable along the first guide column and the second guide column between a return position and a plunging position relative to the base plate. The drill guide also includes a tapered portion defined in the first guide column. The drill guide also includes a depth stopper that is operably engaged with the first guide column, wherein the tapered portion enables self-tightening of the depth stopper about the first guide column.