CPC B23B 45/008 (2013.01) [B23Q 5/32 (2013.01)] | 24 Claims |
1. A portable electrical drilling assembly configured for drilling holes in a surface of a workpiece, said drilling assembly comprising:
a gear box comprising one or more gears;
a feed mechanism coupled to said gear box and movable relative to said gear box between a plurality of positions including a raised position and a lowered position;
a spindle coupled to said feed mechanism and having an outer ring portion and an inner ring portion positioned within and rotatable relative to said outer ring portion, said spindle configured to move rectilinearly toward or away from the surface of the workpiece as said feed mechanism moves between said plurality of positions,
a cutting component coupled to said inner ring portion, said cutting component including an internal surface defining a component cavity, and
a splined shaft connected to one of said gears and rotatable when said one or more gears are rotating, wherein a length of said splined shaft includes a series of splines slidingly received within said component cavity and engaged with said internal surface of said cutting component, with the rotation of said splined shaft rotating said cutting component, and with the rotation of said cutting component rotating said inner ring portion within said outer ring portion of said spindle.
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