I would observe that I think second guessing is a healthy part of any well controlled process and the goal of this framework is certainly not to restrict second guessing, rather itâs to improve judgment quality and thereby the acceptability and credibility of the judgment with those charged with second guessing them.
They can be flat root, fillet root, or major diameter fit. The purpose of this type of spline is to allow for angular misalignment between the shaft and mating detail. This is accomplished by crowning the male tooth. The tooth (usually) has a symmetrical crown about the centerline of the spline face-width.
For example, in stable rock or with trench shields (boxes), where the sides are nearly vertical (between 75Â° and 90Â°), a ladder would be appropriate; ladders must never be used at angles less than 60Â°. Between 30Â° and 50Â° from the horizontal, use a stair system (job-made wood type or earth benched).