A bore finishing tool has an arbor with a tapered outer circumferential surface and a sleeve over the arbor having a tapered inner circumferential surface cooperatively disposed in surface to surface overlaying relation to at least a substantial portion of the tapered outer circumferential surface of the arbor. The sleeve is adjustably movable relative to the arbor for expanding a diametrical extent of the sleeve and has a plurality of internal material relief features at circumferentially spaced locations in the tapered inner circumferential surface extending partially through the sleeve so as to reduce a level of force required for expanding the diametrical extent of the sleeve. Exemplary material relief features include flutes and fractures. The sleeve can also include an external retraction feature enabling application of a retraction force by an external device for reducing the diametrical extent.

Lapping tools are provided that include at least one angled feature that forms at least one surface angle with the lapping surface. In some examples, angled features may include a first surface angle and a second surface angle. Each surface angle of the angled feature is configured to retain abrasive grit and provide a desired type of finish.

A honing sheath device for honing a blade using a rigidly supported soft and smooth surface includes a tool with a handle and a rigid member extending from the handle. A sheath constructed of a flexible material is deployable around the rigid member of the tool to produce a rigidly supported soft and smooth surface for honing blades.

To provide a method for forming an anchor hole and a diameter expansion device by which a centrifugal force can be appropriately adjusted when a cutting-blade portion is moved in a radial direction by the centrifugal force to grind a diameter expansion portion. In a method for forming an anchor hole for a post-installed anchor in which a diameter expansion drill bit is inserted and rotated in a prepared-hole portion bored in a concrete fixing body and a cutting-blade portion of the diameter expansion drill bit is moved in a radial direction by a centrifugal force to grind a part of the prepared-hole portion to form a diameter expansion portion, the minimum value of the centrifugal force applied to grind the diameter expansion portion is 0.75 N and preferably 1.1 N.

The present invention relates to a honing tool having a tool body in lightweight construction, and at least two radially feedable hone strips, the hone strips being radially feedable via a rack-and-pinion gear, the rack-and-pinion gear comprising a central toothed shaft adapted and arranged to interact with racks associated to the respective hone strips to feed the hone strips, wherein the honing tool comprises a pneumatic measuring device for in-process diameter measurement of a diameter of an opening to be machined in a workpiece.

A polishing tool unit (1) includes a brush-shaped grinding stone (4) and a tool holder (2). The tool holder (2) includes a shank (2a), a sleeve (6), a gear screw (30), and a nut (36). The nut (36) is screwed onto a bolt portion (34) of the gear screw (30). The brush-shaped grinding stone (4) is connected to the front side of the nut (36) and held by the tool holder (2). The gear screw (30) is rotatable relative to the shank (2a) and the sleeve (6) about the axis (L). While rotation of the nut (36) about the axis (L) is regulated, the gear screw (30) is rotated, whereby the nut (36) is moved and the protruding amount of linear grinding members (3) is adjusted.

A honing brush is provided comprising a brush hub having a face wherein the face has at least one or a plurality of two or more outwardly projecting bristles having a length that is from about 15 millimeters to about 25 millimeters, a grit size of about or greater than 240 grit to about 800 grit, a diameter of from about 0.2 millimeter to about 0.8 millimeter, and wherein the plurality of bristles are arranged in either a non-tufted bristle arrangement or a tufted bristle arrangement, and wherein each of said bristles is made of a polymer material.

A modified honing brush is provided comprising one or more bristles and one or a plurality of reusable stackable plates having one or more holes or voids located in the plates, or one or more support guides, and wherein each of the bristles is independently fitted through one or more of the holes or voids of the plates or surrounded by one or more support guides.

A honing tool or device having a generally cylindrical body includes a plurality of axially extending webs to which are attached a like plurality of curved honing blades. A portion of the external surface of each blade remote from the attachment point includes an abrasive coating. The radius of curvature of the portion of the blades including the abrasive coating is nominally the same as the radius of the desired finish diameter of the bore. Resilient dampers are disposed behind the blades in the body to dampen vibrations. An additional plurality of webs may be disposed behind the blades to limit their inward translation. A double or tandem honing device includes a pair of the just described honing tools which are arranged in axially spaced apart relationship on a common shaft.

To provide a method for forming an anchor hole and a diameter expansion device by which a centrifugal force can be appropriately adjusted when a cutting-blade portion is moved in a radial direction by the centrifugal force to grind a diameter expansion portion. In a method for forming an anchor hole for a post-installed anchor in which a diameter expansion drill bit is inserted and rotated in a prepared-hole portion bored in a concrete fixing body and a cutting-blade portion of the diameter expansion drill bit is moved in a radial direction by a centrifugal force to grind a part of the prepared-hole portion to form a diameter expansion portion, the minimum value of the centrifugal force applied to grind the diameter expansion portion is 0.75 N and preferably 1.1 N.