A grinding apparatus includes a table that holds a workpiece, and a grinding unit including a grinding wheel mounted to a spindle. The grinding wheel has a grindstone formed by binding abrasive grains with a bonding agent. In addition, the grinding apparatus further includes: a supply unit that supplies grinding water to at least the grindstone when grinding the workpiece; and a light applying unit that is disposed adjacent to the table and that applies light to a grinding surface of the grindstone grinding the workpiece held by the table. The light applying unit includes a light emission section that emits light, and a diffusion preventive wall that surrounds the light emission section and prevents diffusion of the light.

A grinding apparatus includes a table that holds a workpiece, and a grinding unit including a grinding wheel mounted to a spindle. The grinding wheel has a grindstone formed by binding abrasive grains with a bonding agent. In addition, the grinding apparatus further includes: a supply unit that supplies grinding water to at least the grindstone when grinding the workpiece; and a light applying unit that is disposed adjacent to the table and that applies light to a grinding surface of the grindstone grinding the workpiece held by the table. The light applying unit includes a light emission section that emits light, and a diffusion preventive wall that surrounds the light emission section and prevents diffusion of the light.

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 damped abrasive article comprises a damping body and an abrasive surface provided on at least a portion of the damping body. The damping body comprises a synthetic polymer having a Storage Modulus from 1000 MPa to 2500 MPa and a Loss factor from 0.025 to 0.10 at 25 C. and 10 Hz.

An example trimming tool includes a floating base having a first side and an opposite, second side, a first rail, and a second rail. At least the second side of the floating base, the first rail and the second rail define a workspace having a first opening and a second opening. The trimming tool also includes a milling apparatus, attached to the floating base, having a base on the first side of the floating base and a milling head on the second side of the floating base. The milling head is spring loaded. The floating base and milling apparatus are configured to remove at least a portion of a foam layer in the workspace.

A grinding element mounted on a grinding wheel and a grinding wheel containing the same are provided for grinding. The grinding element includes a grinding tooth, and the grinding tooth includes a grinding material having a framework structure and pores distributed in the framework structure. The framework structure includes a bond material and abrasive particles that are bonded by the bond material. A pore size of the pores is larger than 40 microns but smaller than 70 microns. A manufacturing method for semiconductor packages using the same is also provided.

A grinding element mounted on a grinding wheel and a grinding wheel containing the same are provided for grinding. The grinding element includes a grinding tooth, and the grinding tooth includes a grinding material having a framework structure and pores distributed in the framework structure. The framework structure includes a bond material and abrasive particles that are bonded by the bond material. A pore size of the pores is larger than 40 microns but smaller than 70 microns. A manufacturing method for semiconductor packages using the same is also provided.

The invention refers to a polishing pad (11) adapted for being detachably attached to a bottom surface (9a) of a plate-like backing pad (9) of a hand-held power tool (1). The backing pad (9) is actuated by an electric or pneumatic motor of the hand-held power tool (1), in order to perform a purely rotating, a random orbital or a roto-orbital working movement. The polishing pad (11) comprises a bottom working surface (11b) facing a workpiece to be polished during intended use of the power tool (1). It is suggested that the bottom working surface (11b) has at least two pieces (12, 13) of polishing material with different characteristics. A bottom working surface (13b) of at least one of the pieces (13) of the polishing pad (11) having a first characteristic extends beyond a bottom working surface (12b) of at least another of the pieces (12) of the polishing pad (11) having a different second characteristic. (FIG. 2)

A tool for removing fusion bonded epoxy coating from the surface of a pipe has an elongate rotatable shaft suitable for being received in a rotating tool holder of a machine. Extending radially outward of the distal end of the shaft are a plurality of fingers, the outer ends of which are spaced apart. Each of the fingers is made of a spring metal, and at the distal end of each finger is an abrasive pad having diamond particles embedded in soft metal. Spring force is independently applied by each spring finger to its associated abrasive pad.

A tool for removing fusion bonded epoxy coating from the surface of a pipe has an elongate rotatable shaft suitable for being received in a rotating tool holder of a machine. Extending radially outward of the distal end of the shaft are a plurality of fingers, the outer ends of which are spaced apart. Each of the fingers is made of a spring metal, and at the distal end of each finger is an abrasive pad having diamond particles embedded in soft metal. Spring force is independently applied by each spring finger to its associated abrasive pad.