A polishing apparatus which can efficiently polish an entirety of a back surface of a substrate, with the back surface facing downward, is disclosed. The polishing apparatus includes: a substrate holder configured to rotate the substrate; a polishing head configured to polish the back surface of the substrate; a tape advancing device; and a translational rotating mechanism configured to cause the polishing head to make a translational rotating motion. The substrate holder includes a plurality of rollers which are rotatable about their own axes. The plurality of rollers have substrate-holding surfaces capable of contacting a periphery of the substrate. The polishing head is disposed below the substrate-holding surfaces. The polishing head includes a polishing blade configured to press the polishing tape against the back surface of the substrate, and a pressing mechanism configured to push the polishing blade upward.

The invention relates to a method for producing a gear worm (12) which is located in particular on an armature shaft (14) of an electromotive drive unit (10), wherein firstly a worm gear (20) having screw flanks (22) axially opposite one another on a longitudinal axis (18) is formed by means of a rolling tool, and subsequently a groove structure (24) which is concentric about the longitudinal axis (18) is formed on the screw flanks (22) by means of an additional process step. The invention also relates to a gear worm (12) produced according to the method according to the invention, and to a transmission drive unit (10) containing such a gear worm (12).

The invention relates to an apparatus for machining the running edges of a sporting device, more particularly a ski or a snowboard, comprising a transport apparatus, which can be temporarily connected to the sporting device, for the automated movement of the sporting device in a movement sequence having, at least in parts, a movement direction substantially parallel to the longitudinal direction of the sporting device, wherein the following are located one behind the other in said movement sequence of the sporting device: a lower-edge machining unit for machining a lower surface of at least one running edge, said lower surface laterally adjoining the running-surface covering of the sporting device; a lateral-edge machining unit for machining a lateral surface of the at least one running edge, said lateral surface adjoining the bottom of the lateral surface of the sporting device; and a deburring unit for removing a burr formed by the lateral-edge machining unit on the at least one running edge.

The method is for profiling blades with a belt grinding profiling machine. The blades are mounted into a vise. A vertical position of the template is adjusted by rotating the rotatable knob. The motor is turned on to rotate the grinding belt over the grinding wheel. The guide wheel engages the underside profile of the template. The guide wheel of the template guides movement of the grinding wheel mounted on the common axle by moving the guide wheel along the underside profile of the template. The grinding belt grinds material off the underside of the blade until a portion of the underside profile of the template is copied to the underside of the blade.

A knife sharpener is made up of a housing containing a sanding belt and a driving system that engages the belt to cause it to move in a sharpening area where a knife can come into contact with the sanding belt. The knife sharpener also includes a first angle guide having a surface against which a first side of a knife can be positioned so the edge of the knife can be positioned in the sharpening area, a second angle guide having a surface against which a second side of the knife can be positioned so the edge of the knife can be positioning in the sharpening area, and an angle adjustment mechanism that can adjust the angle of the first angle guide and the second angle guide to change the angle of the surfaces relative to the sanding belt.

The polishing apparatus has a polishing unit capable of polishing a peripheral portion of the substrate to form a right-angled cross section. The polishing apparatus includes: a substrate holder that holds and rotates the substrate; guide rollers that support a polishing tape; and a polishing head having a pressing member that presses an edge of the polishing tape against the peripheral portion of the substrate from above. The guide rollers are arranged such that the polishing tape extends parallel to a tangential direction of the substrate and a polishing surface of the polishing tape is parallel to a surface of the substrate. The substrate holder includes: a holding stage that holds the substrate; and a supporting stage that supports a lower surface of the peripheral portion of the substrate in its entirety. The supporting stage rotates in unison with the holding stage.

A finishing device for finish machining of a workpiece, in particular of a crankshaft or a camshaft, comprising a workpiece holder and a rotary drive for rotating the workpiece about the workpiece axis thereof, comprising at least one first finishing tool for machining a main bearing concentric to the workpiece axis and at least one second finishing tool for machining an additional bearing, wherein the finishing tools can be moved along a transport axis which extends via a working area defined by the workpiece holder so that the finishing tools can be moved into an additional area arranged outside the working area.

A polishing apparatus which can maintain a polishing load within an appropriate range is disclosed. The polishing apparatus includes: a pressing member for pressing a polishing tool against the substrate; an actuator configured to control a pressing force of the pressing member; a positioning member which is movable together with the pressing member; a stopper arranged to restrict movement of the pressing member and the positioning member; a stopper moving mechanism configured to move the stopper in a predetermined direction; a polishing-load detector configured to obtain a load feedback value which varies according to a polishing load applied to the pressing member; and a stopper-speed determining device configured to determine a movement speed of the stopper which can allow the load feedback value to fall within a set range.

Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener includes an abrasive medium having an abrasive surface. A stationary tool support guide provides a guide surface that supports a side of the tool during presentation of a cutting edge of the tool against the abrasive surface. A rotatable edge guide has a roller member with a curvilinearly extending outer surface. The roller member is rotatable about an edge guide roller axis to engage, via rolling contact, the cutting edge during the presentation of the cutting edge against the abrasive surface.

Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener includes an abrasive medium having an abrasive surface. A stationary tool support guide provides a guide surface that supports a side of the tool during presentation of a cutting edge of the tool against the abrasive surface. A rotatable edge guide has a roller member with a curvilinearly extending outer surface. The roller member is rotatable about an edge guide roller axis to engage, via rolling contact, the cutting edge during the presentation of the cutting edge against the abrasive surface.