A counter bearing for machining spindles of machine tools has at least one expansion bushing with an elastically deformable wall that delimits at least one pressure chamber. The pressure chamber accommodates a pressure medium. A supply line for the pressure medium opens into the pressure chamber. A pressure conduit opens into the pressure chamber. A mechanically actuatable pressure element is disposed in the pressure conduit and actuated by an actuating tool. A piston is slidably arranged in the pressure conduit and actuated by the pressure element, wherein the piston loads the pressure medium.

Jigs and fixtures for aligning, guiding, and/or holding a workpiece on woodworking machinery during a woodworking operation are described, as well as methods of making, modifying, and using jigs and fixtures.

A chuck apparatus for the fastening to a working spindle (2) of a tool machine, with a chuck body (8) comprising a receptacle (7) for the working spindle (2), with at least two chuck jaws (9) which can be adjusted radially to the body axis, and with a drive ring (10), for whose rotation taking place in the circumferential direction a drive (11) is provided, comprising a structure is formed on the drive ring (10) on its outer circumference or its inner circumference for each chuck jaw (9) and which serves for its adjusting. The invention furthermore relates to a rapid replacement system (1) with the chuck apparatus (3) as a base flange (4) and with a replacement flange (5).

A pocket hole jig with screw sizing system includes a pocket hole jig with a guide block reciprocally carried by a guide holder. The guide block can be raised or lowered relative the guide holder between a range of distances corresponding and calibrated to a horizontal range defined by a workpiece. A scale on a gauge member carried by the guide block is divided into a plurality of zones. An indicator is carried by the guide holder for indicating one of the plurality of zones by the position of the guide block relative the guide holder. Also provided is a series of different size screws, wherein each different size screw of the series corresponds to one of the plurality of zones.

A mechanism for the optimisation of a manual angular adjustment.

The object of this invention concerns an assembly including: A fixed mount (1); A part (2) having at least one approximately circular face mounted on the fixed mount (1) so that the part (2) is mounted so as to be mobile in rotation around an axis approximately centred on the circular

characterised in that the assembly also includes a device for the positional adjustment of the part in relation to the mount including at least: One first scale (4) in an area (5) linked to the fixed mount (1) positioned on at least one portion of the periphery of the mobile part (2), the first scale (4) being a measuring scale; One second scale (6) positioned on the circular face of the mobile part (2), the second scale (6) being a Vernier scale.

Jigs and fixtures for aligning, guiding, and/or holding a workpiece on woodworking machinery during a woodworking operation are described, as well as methods of making, modifying, and using jigs and fixtures.

A hole-drilling guiding device includes a base including a bottom seat and two vertical seats extending upward from the bottom seat. The bottom seat has a bottom surface including two coupling bar fixation sections. Two rotary seats are respectively and rotatably coupled to the vertical seats. A rotary knob is coupled to one of the rotary seats. A handle is coupled to the other one of the rotary seats. Two guide posts are received through the rotary seats. A chuck seat is fit to the guide posts. A chuck is rotatably mounted to the chuck seat. Two coupling bars are provided, each including a bar body, a rotation driving section at one end of the bar body, and a first fixation section at an opposite end of the bar body. The first fixation sections of the coupling bars are selectively and removably coupled to the coupling bar fixation sections of.