The number "38" most often points to Table 38 in the document or page 38 of specific digital distributions or related technical manuals.
: Expressed as a fraction (e.g., 8/16), where the first number is the diametral pitch and the second is the stub pitch. Pressure Angle ( : Standard angles are 30 raised to the composed with power 37.5 raised to the composed with power 45 raised to the composed with power Space Width and Tooth Thickness ansi b 92.1 pdf 38
The standard establishes specific tolerance classes—typically 4, 5, 6, or 7—that permit a "mix" of mating members. For example, a Class 5 internal member can be combined with a Class 7 external member to provide an overall assembly tolerance in the Class 6 range. This flexibility reduces manufacturing costs, as one member can be produced with looser tolerances if the other is held to stricter specifications, while still satisfying the overall design requirements. The number "38" most often points to Table
Defines "effective" vs "actual" space width and tooth thickness. For example, a Class 5 internal member can
The ANSI B92.1-1996 standard is an essential technical resource for mechanical designers and manufacturers. By providing clear guidelines on tooth geometry, tolerance classes, and inspection methods, it enables the reliable production of high-strength, self-centering involute splines. Its emphasis on effective fit and interchangeability makes it a fundamental tool in ensuring the quality and functionality of splined connections in heavy-duty machinery. References
The standard, titled "Involute Splines and Inspection," provides the engineering specifications for design, dimensions, and inspection of straight (non-helical) involute splines. The reference to "PDF 38" typically corresponds to specific technical tables or sections found within the 162-page standard or associated engineering handbooks. Core Technical Specifications