A device for cutting a sink opening in a countertop is described. The device includes a base for receiving and securing the countertop. It also includes a cutting assembly that has a rotating cutting tool and a servomotor for controlling a depth of the rotating cutting tool, multiple sets of guide rails attached to said base wherein said cutting assembly moves along said rails; a position controller which controls the position of said cutting assembly and the depth of the rotating cutting tool. The controller uses digital templates of sink openings to position the cutting assembly along the guide rails and sets the depth of the cutting tool.

A bit and/or pick that includes a collapsible slotted retainer and a non-rotating washer. The bit includes an upper body portion and a shank. The collapsible slotted retainer and the washer are disposed circumferentially about the shank of the bit. The washer is also disposed between a bottom of the upper body portion of the bit and a forward end of the retainer. The bit is inserted into a bore of a bit holder or a base block and the washer axially aligns the bit and the bit bolder or base block along a centerline to self-center the bit in the bore. As the bore becomes worn during use, the washer engages the forward end of the retainer and urges the washer away from a front face of the bit holder or base block, to collapse the retainer and increase a diameter of the retainer to approximately match a diameter of a bore of the bit holder or base block and restore the interference fit with the bore.

A cutting tool holding device, which is for holding a cutting tool, includes a base, a holder, and a limiting set, wherein the holder is disposed on the base, and the limiting set is disposed in a non-circular channel of the base. A connecting shaft portion of the holder is for inserting into a storage hole of the base, wherein the connecting shaft portion includes a shaft body and at least one positioning portion, and the non-circular channel includes an abutting member and a bolt. The bolt is passed through the abutting member, wherein the abutting member is moved to an opening hole of the storage hole along an axis by rotating the bolt so as to push the positioning portion and abut the shaft body.

A wear cap for use on an earth working roil for mining, construction and public works machines such as crushers, surface miners, milling machines and the like includes a working end and a rear mounting end. The rear mounting end including a pair of top and bottom rearwardly extending protrusions, a retainer, and a cavity having side stabilizing surfaces and a top and bottom rail or groove to support the wear cap on a holder mounted to the earth working roll.

Improvements in previous bit assembly components including shortened slotted shanks and shortened base block bore receiving portions disclose relationships between shank differential interference portions and the corresponding base block bores. Changes in the differences in interference angles lead to changes in slot width, length and steel hardnesses in order to provide necessary retaining forces between the shank and base block bore.

A milling machine for milling a surface of a roadway includes a frame and a milling assembly having a cutter drum that is mounted for rotation with respect to the frame. The cutter drum has a drive shaft on which a sheave is mounted. A primary drum drive assembly is adapted to rotate the cutter drum with respect to the frame. The primary drum drive assembly includes a drive belt that cooperates with the sheave on the drive shaft for the cutter drum to rotate the cutter drum. A belt lift assembly may be operated to selectively disengage the drive belt from the sheave of the drive shaft for the cutter drum.

A milling machine for milling a surface of a roadway includes a frame and a milling assembly having a cutter drum that is mounted for rotation with respect to the frame. The cutter drum has a drive shaft on which a sheave is mounted. A primary drum drive assembly is adapted to rotate the cutter drum with respect to the frame. The primary drum drive assembly includes a drive belt that cooperates with the sheave on the drive shaft for the cutter drum to rotate the cutter drum. A belt lift assembly may be operated to selectively disengage the drive belt from the sheave of the drive shaft for the cutter drum.

A cutter bit adapted to be fixed onto a working surface of a rotating drum of a milling, planing, mining or reclaiming machine is provided. The body of the cutter bit is generally formed of a hardened steel, the cutting surface may be a diamond composition fixed in a step in the upper end of the cutter bit. The cutter bit includes a cutting surface, and the cutting surface may include non-parallel side edges and an upper cutting edge parallel to a lower edge. The lower edge may be any length sufficient to inhibit unintended angular displacement of the cutting surface during operation of the working surface. Alternatively or in addition, the cutting surface may be defined by three edges to allow the cutting surface to be removed and repositioned in at least a second orientation.

A tool for positioning a block on a milling drum having a plurality of welded blocks thereon is provided. The tool includes a longitudinal body. The tool also includes a plurality of arm members extending from the longitudinal body. Each of the plurality of arm members includes a fixture body provided at a distal end thereof. The tool further includes a plurality of fixture assemblies coupled to the fixture body of the corresponding arm member. The plurality of fixture assemblies are adapted to be coupled with corresponding welded blocks of the plurality of welded blocks. Further, at least one of the plurality of arm members and the corresponding fixture assembly coupled to the at least one of the plurality of arm members are adapted to position the block at a desired position on the milling drum relative to the plurality of welded blocks.

A method of cutting (e.g. micro-milling) brittle materials where a protective ductile layer is present on the brittle material during the cutting step. The method offers an improved edge quality of the machined profile relative to previous cutting (e.g. micro-milling) techniques. A machined product obtained by or obtainable by this method is disclosed.