AutoCAD DWG mechanical Drawing of the gearbox stud ? 45 x 138.40 section detailed drawing is given in this CAD DWG file. The drawing file shows the Clear section details of the gearbox. keyway, both ends required center drill is mentioned in this drawing. Download the AutoCAD 2D DWG file. Thank you so much for downloading AutoCAD DWG 2D drawings from the cadbull website.