Abstract: Apparatus and a method for splining annular thin wall power transmission members in a manner that provides precise spline formation and accurately maintains the roundness of the splined members. A toothed pinion type mandrel of the apparatus mounts a power transmission member to be splined between a pair of cooperable dies of the apparatus. Each die has at least one first tooth group and a second tooth group, and teeth of each tooth group are spaced therealong with the teeth of the first group spaced farther from each other than the teeth of the second group. Driving of the dies relative to each other and the power transmission member mounted on the mandrel initially engages the farther spaced teeth with the mounted transmission member so as to cooperate in a meshing relationship with the toothed mandrel with the power transmission member therebetween to form a first set of splines.

Abstract: A method and machine for splining a power transmission member by rolling are disclosed as well as the resultant splined member. An externally toothed pinion-type mandrel of the machine is rotatably mounted between a pair of elongated dies. An unsplined member is supported by the mandrel so that sliding movement of the elongated dies from an end-to-end relationship to an overlapping relationship meshes teeth on the dies and the teeth on the mandrel with a thin-walled annular sleeve portion of the member therebetween. The meshing of the die and mandrel teeth deforms the sleeve portion of the member radially to form the splines and also rotates the mandrel to complete the spline forming operation about the total circumference of the member. The mandrel may be removably mounted in a manner that permits a pair of the members to be simultaneously splined by a single stroke of the elongated dies.

Abstract: A rotatable endoscopic surgical snare having an operating loop which is rotatable about the longitudinal axis of a torque transmitting center member connecting the operating loop to an electrical power supply. The operating loop is retractable and protractable into and from a protective flexible sheath. The operating loop is formed of a resilient spiral sleeve through which a core member extends.