Early McColloch Supercharger, Part 1 Photo Gallery
Wallic then measured the shaft’s endplay, the distance the shaft moves axially. Gaskets between the brass driveshaft thrust cap from the last step and the bearing retainer below it determine the play. Wallic copied the reference blower’s 0.010-inch endplay, which may be a touch loose but safer than too tight. McCulloch specifies 0.002-inch and 0.003-inch gaskets at that joint.