![]() Shown as a maximum dimension and the external spline minor diameter is shown as a minimumĭimension. Therefore, on side fit splines, the internal spline major diameter now is Only on the spline being within effective specifications from the tip of the tooth to theįorm diameter. The Standard recognizes the fact that proper assembly between mating splines is dependent There have been no tolerance nor fit changes to the major diameter fit section. The interchangeability limitations with splines made to previous standardsĪre given later in the section entitled “Interchangeability.” Spline has been changed and a tolerance applied to include the range of the 1950 and theġ960 standards. The major diameter of the flat root side fit Has been deleted because of its infrequent use. The Standard has only one fit class for all side fit splines the former Class 2 fit. Term “serration” will no longer apply to splines covered by this Standard. Tables for these splines have been rearranged accordingly. ![]() ![]() Term “involute serration,” formerly applied to involute splines with 45-degree pressureĪngle, has been deleted and the standard now includes involute splines with 30-, 37.5-, andĤ5-degree pressure angles. Standard are retained plus the addition of three tolerance classes, for a total of four. In American National Standard ANSI B92.1-1970 (R 1993), many features of the 1960 Stresses, and they can be measured and fitted accurately. Involute splines have maximum strength at theīase, can be accurately spaced and are self-centering, thus equalizing the bearing and The internal spline is held to basic dimensions and theĮxternal spline is varied to control the fit. The general practice is to form theĮxternal splines either by hobbing, rolling, or on a gear shaper, and internal splines eitherīy broaching or on a gear shaper. ![]() ![]() Similar in form to internal and external involute gears. (from the Machinery's Handbook 27)Īmerican National Standard Involute Splines*.-These splines or multiple keys are ![]()
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