Feb 20, 2021 · Fillet root splines have a smooth curve between adjacent teeth and the root diameter, flat root splines may not and will have a flat portion of tooth space between teeth. Fillet root teeth provide better bending strength and thus higher load capacity.

The internal spline is held to basic dimensions and the external spline is varied to control the fit. Involute splines have maximum strength at the base, can be accurately spaced and are self-centering, thus equalizing the bearing and stresses, and …

Jul 19, 2017 · Splines are made with either a fillet root or a flat root at the interface of the tooth flank and the root diameter. The root diameter of a flat root external spline is typically larger than a fillet root spline, but the stresses are close to being the same because the fillet root with the smaller root diameter offsets the sharper corner but ...

The following are equations and engineering design calculator to determine critical design dimensions and features for an involute gear. *Shear stress and spline length are calculated based on the assumption that only 25% of the teeth make contact at any given moment. Deutschman, Michels, Wilson. Machine Design: Theory and Practice.

Aug 4, 2006 · As far as I know ANSI B92.1-1996 does not provide tolerances for root diameters (ie. internal spline major diameter and external spline minor diameter) of 30deg PA, flat root, side fit splines. The spec only provides a single limit dimension for each.

Jan 1, 2005 · Involute splines come in several varieties: Flat root side fit, fillet root side fit, and major diameter fit. The flat root side fit has a slightly larger minor diameter (male) and smaller major diameter (female) than the fillet root spline.

This article provides an overview of engineering drawing dimensional data required to define and subsequently manufacture an involute spline or gear.

Involute splines are the predominant form bacause they are stronger than straight sided splines and are easier to cut and the fit. The external spline can be formed either by hobbing or by a gear shaper. Internal splines are formed by broaching or by a gear shaper.

Flat Root Side Fit 2.515 thru 32/64 Pitch D cos 300 Spline Flat Root Major Dia. Fit 3/6 thru 16/32 Pitch D cos Fillet Root Side Fit 2.5/5 thru 48/96 Pitch D cos 1.8 1.8 2 N +1 + 2cf N- 2cf 37.50 spline Fillet Root Side Fit 2.515 thru 48/96 Pitch D cos N +1.6 0.8 1.3 N-=-I+ 2cf 450 spline Fillet Root Side Fit 10/20 thru 128/256 Pitch D cos 0.2

Jan 22, 2020 · They are one of the most commonly used types of spline shaft due to their tendency to self-center, enhanced structural strength, and ease with which they can be adjusted to a variety of dimensions. Types available include: Major diameter involute splines; Fillet root involute splines; Flat root involute splines