Patent ID: 11938585
Assignee: STRINGTECH WORKSTATIONS INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 12:
13. A method of forming a workpiece into a predetermined shape, the method comprising the steps of:
(a) providing a drill press comprising a chuck defining a drill chuck axis and comprising a pillar supporting the chuck and a work table positioned below the chuck and transverse to the drill chuck axis;
(b) providing a sander apparatus for abrasion of the workpiece, the sander apparatus comprising:
a base assembly comprising:
a base body comprising an aperture therein;
a central bearing mounted in the base body, the central bearing defining an aperture therein;
at least one load bearing mounted on the base body;

a sander assembly comprising:
a body element defining a disc having a top surface, an opposed bottom surface, and an edge surface that is located transverse to the top and bottom surfaces;
a pin subassembly centrally positioned in the body element and secured to the body element, the pin subassembly being defined by a central pin axis, the pin subassembly comprising:
an upper shaft securable in the chuck to align the central pin axis with the chuck axis and extending from the top surface, and
a lower shaft receivable in the aperture for engagement of the lower shaft with the central bearing to allow rotation of the lower shaft about the central pin axis;

a primary sandpaper element, secured to the top surface;
a secondary sandpaper element, secured to the edge surface, wherein the base assembly is formed to locate the sander assembly in a predetermined location relative to the chuck such that the upper shaft is securable in the chuck and rotation of the chuck about the drill chuck axis causes corresponding rotation of the body element about the central pin axis;

(c) engaging the workpiece with one or both of the primary sandpaper element and the secondary sandpaper element while the body element rotates about the central pin axis, to form the workpiece into the predetermined shape, wherein said at least one load bearing engages the bottom surface to support the sander assembly in the predetermined location against vertically-directed force to which the sander assembly is subiected when the workpiece is urged at least partially downwardly on the primary sandpaper element, and wherein the central bearing engages the lower shaft to support the sander assembly in the predetermined location against horizontally-directed force to which the sander assembly is subiected when the workpiece is urged at least partially transversely against the secondary sandpaper element relative to the central pin axis.