To help you locate your "38," here is a structural breakdown of the classic ANSI B92.1-1970 PDF:
| Section | Typical Content | Approximate Page Range | | :--- | :--- | :--- | | Foreword & Scope | 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 |
If you need page 38 specifically, you are likely looking at inspection gauging data—how to verify a spline using precision pins.
In some digitized versions, section numbering might include "3.8" covering Minor Diameter Limits. If the PDF search is poorly formatted, the user may be looking for clause 3.8.
Key Takeaway: There is no official "PDF 38" version of the standard. The search is likely for a specific reference table or data set located near page 38 or section 3.8. ansi b 92.1 pdf 38
Some state libraries participate in the "Standards Connect" program, allowing free access to ANSI standards via on-site computer terminals.
Avoid: PDF-sharing sites like Scribd, Pirate Bay, or random engineering forums. The "page 38" you need is often corrupted, illegible, or completely missing.
Some users confuse "38" with a pressure angle. ANSI B92.1 primarily covers 30-degree and 37.5-degree pressure angle splines. 38 degrees does not appear in the standard. However, a 37.5-degree pressure angle is common for fillet root splines in high-load applications. The "38" in your search may be a typo or shorthand for "37.5."
The search for "ANSI B 92.1 PDF 38" reflects the real-world need for precise, actionable data from a critical engineering standard. While "38" is most likely a page number pointing to inspection tables (or a misunderstood pressure angle), the key takeaway is the importance of using legitimate, complete standards. To help you locate your "38," here is
Do not rely on fragmented online copies. Invest in the official PDF from ASME, use ISO 4156 as an alternative, or leverage online calculators that respect the standard’s formulas. Whether you need tooth thickness data for a 38-tooth spline or the inspection methods on page 38, accuracy begins with the right source.
Next Steps:
Your splines—and the machinery they drive—will thank you.
Keywords used naturally: ANSI B 92.1, PDF, 38, involute splines, measurement over pins, pressure angle, ASME B92.1, spline inspection. In some digitized versions, section numbering might include
Beware of websites offering "ansi b 92.1 pdf 38 download free." These often contain outdated scans, missing pages (including page 38), or malware. Using unauthorized copies in professional manufacturing can lead to liability issues if a design fails inspection.
While I cannot reproduce the actual table, the format on page 38 typically resembles this (illustrative example):
| Tooth Nominal Pitch (P) | Tolerance Class | Allowance (es) | Effective Space Width Tolerance (T) | Over-Pin Measurement | |------------------------|----------------|----------------|--------------------------------------|----------------------| | 16/32 | 5 | 0.0000 | 0.0022 | 0.1234 / 0.1256 | | 20/40 | 6 | -0.0008 | 0.0028 | 0.0987 / 0.1012 | | 24/48 | 7 | -0.0012 | 0.0035 | 0.0800 / 0.0825 |
These values are critical for spline gage design and verifying fit.