Abstract: A split sprocket wheel designed for use with an endless track including two hub portions. The first hub portion defines multiple first wheel stud holes arranged around a circumference according to a vehicle wheel hub pattern, with each hole encircled by an outwardly projecting flange on an axial surface. The second hub portion similarly defines multiple second wheel stud holes distributed around its circumference, matching the pattern of the first wheel stud holes, each second wheel stud hole surrounded by a countersunk recess on the axial surface. The first and second hub portions interlock, with the flanges from the first hub portion fitting into the corresponding recesses on the second hub portion, thus securing the two components together.

Abstract: A ball screw mechanism has an opposing thread provided by an integral male thread formed at one end of a nut received on the screw. The male thread is of a smaller form than the female thread on the screw so as to not normally be in contact therewith, but should ay loss of the balls occur with the resultant slight relative axial shift of the screw and nut, the male threads engage to limit such relative axial movement to protect connected equipment. Both the nut male and female threads may be machined from a cylindrical nut blank.

Abstract: A ball screw mechanism has an opposing thread provided by an integral male thread formed at one end of a nut received on the screw. The male thread is of a smaller form than the female thread on the screw so as to not normally be in contact therewith, but should ay loss of the balls occur with the resultant slight relative axial shift of the screw and nut, the male threads engage to limit such relative axial movement to protect connected equipment. Both the nut male and female threads may be machined from a cylindrical nut blank.