| 摘要 |
<p>A shoulder bushing (1) is provided for concentrically fastening a circular saw blade (5) having an oversized mounting aperture, to a spindle (6) of a rotary power tool. The bushing (1) includes a disk (10) having a central bore (12) sized and shaped for concentric engagement with the spindle (6). An annular shoulder (3) located on one side of the disk (10) has an outer diameter sized for receipt within the oversized central aperture (2) of the saw blade (5). The disk (10) is provided with an outer diameter large enough to be engaged by a concave flange (7) disposed on the spindle (6), by which the disk (10) is clamped to the spindle (6) in superposed orientation with the saw blade (5).</p> |
