CNCL S/S BY AGMA 218.01
This standard presents the fundamental formula for rating thesurface durability (pitting) of spur gear teeth. It contains all ofthe factors which are known to affect the resistance of gear teethto pitting. This formula is not applicable to other types of geartooth surface deterioration such as plastic yielding, scoring,welding, etc. This standard is based on AGMA Information Sheet215.0 I, “Information Sheet for Surface Durability (Pitting) ofSpur, Helical, Herringbone and Bevel Gear Teeth” and is coordinatedwith the durability ratings for helical, herringbone, and bevelgears.
Pitting of gear teeth is considered a fatigue phenomenon. Thetwo kinds of pitting – 1) initial, and 2) destructive – areillustrated in Standard AGMA 110.03, “Gear-Tooth Wear and Failure.”Corrective and non-progressive initial pitting is not deemedserious. The aim of this standard is to design the gear teeth sothat destructive pitting does not occur.
Surface durability rating practices for a particular field ofgearing may be established by selecting the proper factors for thisgeneral formula. Proper evaluation of the various factors in thebasic formula will produce suitable ratings for anyapplication.
Where no applicable specific AGMA standard exists, numericalvalues may be estimated for the factors in this general formula andan approximate surface durability rating calculated.
The symbols used, wherever applicable, conform to Standard AGMA112.04, “Gear Nomenclature Terms, Definitions, Symbols, andAbbreviations” and, “Letter Symbols for Mechanics of Solid Bod- ,ies,” (ASA ZlO.3-1948) (RI953)
- Edition:
- 65
- Published:
- 01/01/1965
- Number of Pages:
- 32
- File Size:
- 1 file , 1.2 MB
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