A depth limiting device includes a braking structure; a limited shrinking structure, the limited shrinking structure including a part that surrounds a moving object and being in a home position or a compressed position; and a structure adapted for pushing the limited shrinking structure to the home position. The braking structure brakes the moving object such that the moving object moves together with the depth limiting device. When the moving object enters into a subject, the part of the limited shrinking structure is pressed against the subject, and the limited shrinking structure moves from the home position to the compressed position and stops the moving object from entering further into the subject.

A pocket hole jig system is formed of a plurality of jig segments, wherein each jig segment includes a main body having a drill guide and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. The system also includes one or more spacers that have a main body of varying width and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. Jig segments and spacers may be connected together by inserting the lock feature of a jig segment or spacer into the recess of an adjacent jig segment or spacer. In one arrangement opposing jig segments and/or spacers lock together with a combination of rotational movement as well as sliding movement.

A pocket hole jig system is formed of a plurality of jig segments, wherein each jig segment includes a main body having a drill guide and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. The system also includes one or more spacers that have a main body of varying width and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. Jig segments and spacers may be connected together by inserting the lock feature of a jig segment or spacer into the recess of an adjacent jig segment or spacer. In one arrangement opposing jig segments and/or spacers lock together with a combination of rotational movement as well as sliding movement.

A drill bit stabilizer and a method of drilling holes through work surfaces. The drill bit stabilizer includes an adhesive strip with a drill guide hole portion extending outwardly therefrom. The adhesive strip with the drill guide hole portion is preferably transparent and portable for placement on a surface through which a hole is to be drilled. The method includes the steps of providing an adhesive strip with a drill guide hole portion extending therefrom; positioning the adhesive strip on a surface; releasably mounting the adhesive strip to the surface; inserting a drill bit attached to a drill motor into the drill guide hole portion; drilling a hole through the drill guide hole portion and into the surface beneath it; and removing the adhesive strip from the surface after the hole has been drilled.

A stop for a rotating drilling, milling or countersinking tool comprising a stop sleeve coupled to a radial rolling bearing in such a way that it freely rotates about the tool, an outer bearing bush of the radial rolling bearing being attached to the stop sleeve and an inner bearing bush of the radial rolling bearing being attached to a shaft sleeve that can be attached to a tool shaft of the tool. An axial rolling bearing is also provided, a housing washer of the axial rolling bearing being supported on the stop sleeve and a shaft washer of the axial rolling bearing being supported on the shaft sleeve. In a secondary aspect, the invention relates to a drilling, milling or countersinking tool provided with such a stop.

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.

The shank (12) of a disposable rotary cutting tool (10) comprises a pipe section (16) cut from a drawn metal pipe. The tool head (14) is formed from a cut-out (18a, 18b) of a drawn metal sheet or a section of a metal tube by non-cutting machining. The pipe section (16) and the tool head (14) are advantageously attached by force fitting.

An apparatus for securely holding a drill bit in a handheld drill, the drill bit including a pointed end and a bottom end, is described. The apparatus includes a collet, which includes a silo for accommodating the drill bit therein. The silo includes a fixed stop, such that the bottom end of the drill bit rests against the fixed stop, and a compressible collar for securing the drill bit within the silo. The drill bit has a drill bit length and the silo has a silo depth shorter than the drill bit length such that, when the drill bit is inserted into the apparatus, the pointed end of the drill bit protrudes from the apparatus by a maximum depth defined by the drill bit length minus the silo depth. The apparatus, when used with the handheld drill, only allows drilling of holes having a depth up to the maximum depth.

A self-adjusting pocket hole jig system is presented having a base, an upright assembly operably connected to the base, a clamping assembly, operably connected to the upright assembly, a handle operably connected to the clamping assembly, and a drill guide assembly operably connected to the clamping assembly. The drill guide assembly is configured and arranged to move along the upright assembly between an unclamped position and a clamped position in response to movement of the handle. Movement of the handle simultaneously adjusts the height of the drill guide assembly as well as facilitates clamping of the drill guide assembly for workpieces of various thicknesses.

A drill bit in conjunction with a hammer-drill to penetrate composite metal and non-metal structure or structures including, for example, thick metal or rebar encountered during concrete, rock or masonry boring operations without requiring a change in drill equipment.