) : The theoretical diameter where the tooth thickness equals the space width. : The diameter from which the involute curve is generated. Major Diameter ( Docap D sub o ) : The outside diameter of the external spline. Minor Diameter ( Dicap D sub i ) : The root diameter of the internal spline. 3. Circular Tooth Thickness and Space Width
: The standard covers three primary pressure angles: 30∘30 raised to the composed with power , 37.5∘37.5 raised to the composed with power , and 45∘45 raised to the composed with power .
: The number "38" is the most ambiguous part of the search. It can refer to one of the following:
| Section | Typical Content | Approximate Page Range | | :--- | :--- | :--- | | | Purpose, definitions, spline types | 1-5 | | Basic Formulas | Tooth thickness, space width, root fillets | 6-12 | | Pressure Angles | 30°, 37.5°, 45° design tables | 13-25 | | Tolerances & Fits | Class 1, 2, 3, 4, 5 fits (loose to close) | 26-37 | | Inspection Data | Measurement over pins formulas, pin diameter selection | 38-45 | | Tooth Thickness Tables | Internal spline space width charts | 46-65 | | Annex (Examples) | Calculations for spline design | 66-85 |
This standard provides the dimensions, tolerances, and inspection requirements for straight (non-helical) involute spline teeth. It is widely used in automotive and industrial applications to ensure that internal and external splined components—like a gear on a power takeoff shaft—fit together with the correct amount of "backlash" or clearance. ansi b 92.1 pdf 38
The 1996 revision of ANSI B92.1 brought significant updates compared to the 1970/1993 versions:
The original ANSI B92.1-1970 document runs approximately 80-100 pages (depending on appendix inclusion). typically falls within the section covering inspection principles or tables for measurement over pins .
While I cannot reproduce the actual table, the format on page 38 typically resembles this (illustrative example):
ANSI B92.1 is a standard for " Ball and Socket Gauges" used in various industries, including manufacturing, quality control, and inspection. The standard defines the specifications, test methods, and acceptance criteria for ball and socket gauges. ) : The theoretical diameter where the tooth
The full document is a copyrighted standard published by SAE International or the American National Standards Institute (ANSI) . While technical summaries and formula tables are available on engineering resource sites like Engineers Edge or Scribd , the official complete standard must be purchased for industrial use to ensure compliance with the latest safety and manufacturing revisions. ANSI B92.1-1996 - INVOLUTE SPLINES AND INSPECTION
It is recommended to consult the full ANSI B92.1-1996 revision document to ensure the latest tolerances and fit classes are applied. 5. Inspection and Quality Control
Unlike standard gears, spline teeth are generally cut shallower (often half the depth of a standard gear tooth). Academia.edu 2. Core Technical Specifications
(full title: ANSI B92.1-1996 (R2017) - Involute Splines and Inspection ) is a national standard that establishes specifications for involute splines used in fixed and sliding connections. These splines are integral to transmitting torque between shafts, hubs, gears, and other rotating components. Minor Diameter ( Dicap D sub i )
ANSI B92.1 is a standard for "Keys and Keyseats" in the United States. Here's a brief overview:
: A key concept in B92.1 is the distinction between "effective" and "actual" tooth thickness, which accounts for manufacturing variations such as lead and profile errors. Significance of "Figure 38" or "Page 38"
: They provide thick tooth bases to reduce shear stress.