Abstract: A tool includes a coupling, an inner adjustment sleeve, and an outer adjustment sleeve. The coupling connects a rotary tool to the inner adjustment sleeve. An adjustable portion of the inner adjustment sleeve is threadedly received in the outer adjustment sleeve. An offset aperture in the free end of the outer adjustment sleeve receives a tip of a valve stem for grinding. An optional cup at the end of the outer adjustment sleeve stabilizes the tool. A grinding bit with a shaft retained in a collet of the rotary tool is contained internally, in a channel, extending through the tool.

Abstract: An abrading apparatus for processing an edge of a tube is disclosed. The abrading apparatus includes a rotational symmetry axis and a chassis comprising an input side, an output side opposite the input side, and an input coupler on the input side of the chassis. The input coupler is coaxial with the rotational symmetry axis. The abrading apparatus also includes a centering member, coupled to the output side of the chassis and coaxial with the rotational symmetry axis, and abrasive members, coupled to the output side of the chassis. The abrasive members define an abrasive face radially spaced outwardly from and generally symmetric about the rotational symmetry axis and facing in a direction generally parallel to the rotational symmetry axis.

Abstract: Some embodiments comprise an apparatus for reseating valves, where an eccentric, non-rotational motion is applied in a grinding or lapping process. Other embodiments comprise a micrometer that permits repeatable application of pressure against a plate when the apparatus is removed and reinstalled. In yet other embodiments, levered arms provide an expedient mechanism for positioning a reseating apparatus.

Abstract: A lapping device for lapping an injection molding cylinder seat is provided having a housing that supports a gear system. A drive shaft having a lapping disk secured to one end thereof is mounted for rotation within the housing offset from the central axis thereof. The drive shaft and thus the lapping disk is driven about the central axis by the gearing system.

Abstract: A valve refacing tool comprising a hollow cylindrical column. The column has an upper end and a lower end and has a central bore throughout its entire length. The column has exterior threads at its upper end and an outwardly flared cylindrical support at its lower end. A crown is provided and has a central vertical bore with internal threads removably received by the threads at the upper end of the column. The crown has a lower surface with a radial interior edge adapted to be supported on the upper end of the column. The crown has a plurality of radially extending fins each with an enlarged height at its radially exterior edge and an upper surface at an angle with respect to the vertical. Each upper surface has a dove tail recess. A cylindrical bushing sleeve is positioned within the bore of the column. The bushing sleeve has an upper end located at an intermediate extent of the column and a lower end located beneath the lower end of the column.

Abstract: A disc streak pattern forming method and apparatus are provided which are capable of not only forming fine streak patterns on a disc in a single step, but also arbitrarily adjusting an angle of intersection of streak patterns in a precise manner to thereby reduce the cost of production facilities and the cost of manufacture as well as to improve the magnetic property and the finishing accuracy of the disc. The disc streak pattern forming apparatus is equipped with a drum 2, a pad rotating member 3, a first motor 5 and a second motor 6. Polishing pads 4 mounted on the pad rotating member 3 are placed in sliding contact with the disc in the form of a magnetic disc 200 with an information storage surface 201 thereof being disposed within a central bore 40 in each polishing pad 4.

Abstract: A disc streak pattern forming method and apparatus are provided which are capable of not only forming fine streak patterns on a disc in a single step, but also arbitrarily adjusting an angle of intersection of streak patterns in a precise manner to thereby reduce the cost of production facilities and the cost of manufacture as well as to improve the magnetic property and the finishing accuracy of the disc. The disc streak pattern forming apparatus is equipped with a drum 2, a pad rotating member 3, a first motor 5 and a second motor 6. Polishing pads 4 mounted on the pad rotating member 3 are placed in sliding contact with the disc in the form of a magnetic disc 200 with an information storage surface 201 thereof being disposed within a central bore 40 in each polishing pad 4.