This invention relates to abrasive flap discs that include wearable backing plates and methods of making and using such abrasive flap discs and wearable backing plates. The claimed articles, processes, and systems related to the use and manufacturing of such abrasive articles are improved in performance and cost effectiveness.

A system and method for a composite finishing system. The composite finishing system comprises an abrasive bit with an abrasive material on a removal surface of the abrasive bit, where in the abrasive bit has a pilot structure that positions an abrasive surface relative to an edge break intersection of a hole in a composite structure when a pilot structure is placed into the hole.

A system and method for a composite finishing system. The composite finishing system comprises an abrasive bit with an abrasive material on a removal surface of the abrasive bit, where in the abrasive bit has a pilot structure that positions an abrasive surface relative to an edge break intersection of a hole in a composite structure when a pilot structure is placed into the hole.

A polishing brush (1) includes a brush-shaped grindstone (12) holding grinding element bundles (11) of wire-shaped grinding elements (27) in an annular shape and a grinding element displacement-restricting member (13) for restricting displacement of the grinding element bundles (11) outward. The brush-shaped grindstone (12) has a grinding element holder (15) holding the base end portions (upper end portions) of the grinding element bundles (11). The grinding element displacement-restricting member (13) has an annular part (33) surrounding the wire-shaped grinding elements (27) from the outer peripheral side at a position between the tip ends of the wire-shaped grinding elements (27) and the grinding element holder (15) in the direction of the axis of center of rotation (L) and at a distance away from the tip ends of the wire-shaped grinding elements (27) and the grinding element holder (15). Since the portions on the side closer to the grinding element holder (15) of the grinding element bundles (11) held in the grinding element holder (15) are exposed outward, cutting fluid or air supplied from the outer peripheral side of the polishing brush (1) easily reaches the polished portion of a workpiece.

A polishing brush (1) includes a brush-shaped grindstone (12) holding grinding element bundles (11) of wire-shaped grinding elements (27) in an annular shape and a grinding element displacement-restricting member (13) for restricting displacement of the grinding element bundles (11) outward. The brush-shaped grindstone (12) has a grinding element holder (15) holding the base end portions (upper end portions) of the grinding element bundles (11). The grinding element displacement-restricting member (13) has an annular part (33) surrounding the wire-shaped grinding elements (27) from the outer peripheral side at a position between the tip ends of the wire-shaped grinding elements (27) and the grinding element holder (15) in the direction of the axis of center of rotation (L) and at a distance away from the tip ends of the wire-shaped grinding elements (27) and the grinding element holder (15). Since the portions on the side closer to the grinding element holder (15) of the grinding element bundles (11) held in the grinding element holder (15) are exposed outward, cutting fluid or air supplied from the outer peripheral side of the polishing brush (1) easily reaches the polished portion of a workpiece.

A tool for fine machining surfaces has a working medium carrier with a top face and a bottom face, wherein the bottom face is an attachment side. A set of individual exchangeable strip-shaped lamella holders are provided that each have one or more lamellas in individual or bundled arrangement. The lamellas each are oriented away from the attachment side of the working medium carrier and form in a downward direction remote from the attachment side a common working plane. The lamella holders on a side facing the attachment side are provided with first hooking members and the attachment side of working medium carrier is provided with second hooking members complementary to the first hooking members. The first and second hooking members are joined to each other in a direction perpendicular to the attachment side.

A sanding wheel that may be used, e.g., to finish a wood deck, includes one or more risers. Each riser includes an angled face and a cross member, and the angled face and cross member define a slot therebetween. The retaining or fastening clip includes a retaining spring, and the fastening clip is received on the angled face of the riser with the retaining spring extending into the slot. The blade has an abrasive on a first end and an aperture at a second end, the aperture being defined by a shoulder about the aperture. The second end of the blade extends into the slot with the retaining spring of the fastening clip engaging the shoulder. The slot and the retaining spring are configured to mechanically lock the blade to the riser and the base.

A sanding wheel that may be used, e.g., to finish a wood deck, includes one or more risers. Each riser includes an angled face and a cross member, and the angled face and cross member define a slot therebetween. The retaining or fastening clip includes a retaining spring, and the fastening clip is received on the angled face of the riser with the retaining spring extending into the slot. The blade has an abrasive on a first end and an aperture at a second end, the aperture being defined by a shoulder about the aperture. The second end of the blade extends into the slot with the retaining spring of the fastening clip engaging the shoulder. The slot and the retaining spring are configured to mechanically lock the blade to the riser and the base.

The abrasive unit contains a carrying disc (A) with a hub (1) set off in the central zone, having a coaxial hole (2) reinforced with a steel flange sleeve (3) for mounting the abrasive unit on the spindle of the angular hand grinder. The lower edges of numerous abrasive flaps (B) are fixed with glue binders (5) on the ring surface of the near-edge zone (4), the abrasive flaps subsequently overlapping one another in the circumferential direction so that their rear edges are exposed. The wheel of the carrying disc (A) is a layered polymer composite with reinforcement consisting of at least two meshes of glass fibre situated on both frontal surfaces of the carrying disc (A). The meshes are bonded by a composite matrix containing a binder of a thermosetting synthetic resin, a fine-grained material in the form of inorganic, mineral or synthetic loose material, particularly quartz, calcareous, carbonaceous or polymineral sand, industrial or quarry dusts, blast furnace or copper slag, or a mixture of the aforementioned materials and for which the natural or crumbled grain size ranges from 0.06 to 2.0 mm and the hardness according to the Mohs scale ranges from 3 to 7.

The abrasive unit contains a carrying disc (A) with a hub (1) set off in the central zone, having a coaxial hole (2) reinforced with a steel flange sleeve (3) for mounting the abrasive unit on the spindle of the angular hand grinder. The lower edges of numerous abrasive flaps (B) are fixed with glue binders (5) on the ring surface of the near-edge zone (4), the abrasive flaps subsequently overlapping one another in the circumferential direction so that their rear edges are exposed. The wheel of the carrying disc (A) is a layered polymer composite with reinforcement consisting of at least two meshes of glass fibre situated on both frontal surfaces of the carrying disc (A). The meshes are bonded by a composite matrix containing a binder of a thermosetting synthetic resin, a fine-grained material in the form of inorganic, mineral or synthetic loose material, particularly quartz, calcareous, carbonaceous or polymineral sand, industrial or quarry dusts, blast furnace or copper slag, or a mixture of the aforementioned materials and for which the natural or crumbled grain size ranges from 0.06 to 2.0 mm and the hardness according to the Mohs scale ranges from 3 to 7.