Evaluating how well gear tooth surfaces resist "pitting" or surface fatigue over time.
AGMA 218.01 - Free download as PDF File (.pdf) or read online for free. AGMA 218.01. AGMA 218.01 - Standards | GlobalSpec
sc=CpWtCaCvddwFCmCfIs sub c equals cap C sub p the square root of the fraction with numerator cap W sub t cap C sub a and denominator cap C sub v d d sub w cap F end-fraction the fraction with numerator cap C sub m cap C sub f and denominator cap I end-fraction end-root Cpcap C sub p : Elastic coefficient (accounts for material properties) Wtcap W sub t : Tangential tooth load Cacap C sub a
Failure caused by contact stress (Hertzian stress) over repeated cycles, leading to cavities on the gear tooth surface.
: Ensuring the tensile stress at the tooth root fillet does not exceed the material limits, which leads to catastrophic tooth breakage. agma 21801 pdf
🚫 Avoid random “free PDF” sites – they often host outdated, watermarked, or virus-infected files.
The is a non-profit organization founded in 1916. It develops technical standards for the gear industry, covering everything from design, rating, and lubrication to testing and inspection. As an American National Standards Institute (ANSI)-accredited standards developer, AGMA's publications form the backbone of reliable power transmission engineering in North America and beyond.
AGMA 218.01 was eventually revised and replaced by , which later evolved into ANSI/AGMA 2001-C95 and ANSI/AGMA 2001-D04 . What Changed in Newer Revisions?
While modern software now handles these complex iterations, the logic of AGMA 218.01 is embedded in the DNA of today’s industry standards. For many manufacturers, adhering to these guidelines is the first step toward AGMA Certification , which serves as a badge of quality and reliability in the global market. Transition to Modern Standards Evaluating how well gear tooth surfaces resist "pitting"
): Evaluates the tooth form, stress concentration at the root fillet, and the location of the highest catastrophic load. Size Factor ( Kscap K sub s
The ability of gear tooth flanks to withstand repeated contact stress without developing surface cracks and pits.
For rating spur and helical gears, the current standard is ANSI/AGMA 2001-D04 (R2016) , Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth . For the geometry factors, you should use AGMA 908-B89 , Geometry Factors for Determining the Pitting Resistance and Bending Strength of Spur, Helical and Herringbone Gear Teeth .
The full title is Standard for Rating the Pitting Resistance and Bending Strength of Spur and Helical Involute Gear Teeth . It was published in 1982. AGMA 218
AGMA 218.01 revolutionized the way mechanical engineers calculate gear longevity and stress thresholds. By breaking down complex thermodynamic and tribological interactions into quantifiable factors (
When searching for an , it is vital to source documents legally and safely.
Surface pitting is caused by high contact stresses (Hertzian stress) between mating teeth. The AGMA 218.01 formula calculates the allowable contact stress ( ) and compares it to the calculated contact stress ( σcsigma sub c The general structure of the equation accounts for: Elastic Coefficient ( Cpcap C sub p