Ansi B 92.1 Pdf 38 Jun 2026

The fit is controlled by the major diameter, providing enhanced self-centering. Note that the 1996 standard updated tolerances for these, though they are less commonly used than side-fit splines, according to. 3. Key Design Dimensions and Formulas (ANSI B92.1 PDF Data)

The ANSI B 92.1 PDF 38 standard covers various aspects of keys and keyed joints, including:

: The most common type where contact occurs on the sides of the teeth. ansi b 92.1 pdf 38

: It defines two main fit types— Side Fit (torque transmitted via the flanks) and Major Diameter Fit (centering on the outer diameter).

In tooth side fits, the minimum effective space width and maximum effective tooth thickness are designed to be equal. This allows interchangeability regardless of the tolerance class of individual members. 2.2 Actual vs. Effective Spline Size Understanding the difference is critical for inspection: The fit is controlled by the major diameter,

Accommodates flat root side fit, flat root major diameter fit, and fillet root side fit conditions.

is the most frequent choice for general industrial applications. Key Design Dimensions and Formulas (ANSI B92

The smallest internal space that can fit the entire engagement length of the external spline (includes tooth errors).