Abstract: A precision honing mandrel including a tubular honing member having a helical, straight or other shaped groove therethrough, a substantially cylindrical outer surface, a tapered inner surface, and a layer of a relatively hard wear resistant abrasive substance applied to the cylindrical outer surface, an arbor for mounting said honing member including a first arbor portion for mounting on a honing machine, and a tapered second arbor portion for receiving said honing member thereon, a guide member mounted on the opposite side of the honing member from the first arbor portion, said guide member having an end surface in abutment with one end of the honing member and a tapered inner surface for cooperating with the tapered arbor portion, a keyway formed in said tapered arbor portion and aligned slots in the honing member and in the guide member adjacent the abutting ends thereof, a key member positioned to cooperate with said aligned slots and with said keyway to prevent relative rotational movement between the ho

Abstract: An apparatus for gaging a workpiece surface during an enlarging operation thereon, said enlarging taking place by a working member which enters the work surface from one direction and by reciprocally moving the workpiece relative to the working member during said operation, said apparatus including a support structure with a gaging member thereon which is located to engage the workpiece opposite from the working member in position to be engaged by the workpiece adjacent to the workpiece surface during each cycle of reciprocal movement between the workpiece and the working member, said gaging member being of a size to be able to enter the workpiece surface only when the workpiece surface has been enlarged to some predetermined size, structure supporting the gaging member including a yieldable member on said support structure normally biasing said gaging member in a direction toward the workpiece, and mechanism for detecting movements of the gaging member relative to the support structure including a sensor ope

Abstract: A gaging fixture for presetting the radially extended position of a stationary work engaging contact on a dial bore gage or like instrument, wherein the stationary work engaging contact is mounted on a member threadedly engaged with the gage, which member carries a threaded locking member for locking the threaded member and the stationary work engaging contact thereon in predetermined and determinable positions of adjustment, said fixture including a first member having a portion for engaging the member on which the stationary work gaging contact is located, and a second member movable axially and rotatably relative to the first member and having a portion thereof engageable with the member for locking the stationary work engaging contact in predetermined radial positions, the portions of the said first and second members being constructed and positioned to simultaneously engage the member on which the stationary work engaging contact is located and the locking member associated therewith in only one predeter

Abstract: A dial bore gauge for measuring the size and surface characteristics of internal surfaces including surfaces which may include spaced portions to be gauged, said gauge including a gauging portion having spaced work engaging elements thereon, a dial portion for indicating the condition of the work engaging portions, members operatively connecting the gauging portions with the dial portion, and an actuator element operatively connected to the gauging portions and movable between different selected positions in one of which at least one of the work engaging elements is in a retracted condition and in another of which all of the work engaging elements are in their work engaging positions.

Abstract: An apparatus for automatically controlling the operations of a machine tool such as a honing machine or the like, which apparatus sets in motion apparatus which controls and maintains the operating cycle of the machine automatically and without requiring further operator attention once the machine cycle is started and until the operation has been completed whereupon the machine operation is automatically terminated.