| 摘要 |
A grinding wheel hub is provided for mounting an abrasive grinding wheel on a grinding apparatus. The hub is adapted for use with an abrasive grinding wheel of the type that has a mounting aperture disposed centrally therein, and a grinding face and a backing face disposed on opposite sides of the abrasive grinding wheel. The grinding wheel hub includes an aperture bushing of substantially cylindrical configuration, adapted for extension through and engagement with the surface of the mounting aperture. A grinding face fastener is disposed on the aperture bushing and is adapted to extend radially outward from the mounting aperture to engage the grinding face of the wheel. A backing flange of substantially discoid shape, extends radially outward from the aperture bushing member and is adapted for being superposed with the backing face. The backing flange has a bond surface adapted to face the backing face. The bond surface includes one or more recesses formed therein. Preferably, the recesses have a radial and/or concentric orientation with respect to the center of the aperture bushing. These recesses are sized and shaped to provide a cavity between the backing flange and the backing face of the grinding wheel when the backing flange is engaged with the backing face. These cavities are adapted to receive a bonding agent therein to bond the grinding wheel hub to the abrasive grinding wheel. The backing flange has a diameter which allows it to terminate in the sloped region of the grinding wheel between the outermost circumference of the substantially flat depressed center and the substantially flat grinding wheel portion.
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