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Dimensional accuracy and material requirements for spur gears in the pitch sizes of 0.5 module to 50 module (48 to 0.5 dp)
This standard presents the fundamental formula for rating the surface durability (pitting) of spur gear teeth. It contains all of the factors which are known to affect the resistance of gear teeth to pitting. This formula is not applicable to other types of gear tooth...
The prediction of bending stresses in a gear tooth, resulting fxom an externally applied torque, requires special consideration when designing spur gear systems. The tooth geometry is such that excess risers exist which must be accounted for. In addition, variables affecting...
Introduction Measurements over pins on involute spur gears are taken to determine the tooth thickness of a gear-one way, possibly the most accurate way, to determine tooth thickness. There are other methods which use calipers, special micrometers, gear measuring blocks...
Many models for predicting the dynamic behavior of gears do not take into account the blank flexibility and modes of vibration. The paper presents results for solid, semi-solid and thin rimmed spur gears. The analysis is made for the natural frequencies, when finite element...
Maximizes the accuracy and repeatability of wire Electrical Discharge Machines (EDM) through fixturing and controlled cutting methods. Also optimizes mathematical algorithms for the cutting path. Presents results slowing the verified generation of precise spur gears in pitches ranging...
Dimensions and accuracy requirements for cutters for generating involute spur gear teeth. Two tolerance grades. Covers disc, extended and screwed hub, parallel, large and No. 2 Morse stub shank types. Markings for pinion type cutters and information to give when ordering. Module...
Presents the necessity of comparing ISO and AGMA power rating standards. Gives the results of using computer software to compare the behavior of the bending geometry factor (J-factor) values for 135 spur-gear meshes. Shows that differences exist between the results given by ISO and...
The object of this article is to propose a simplemethod to reduce the transmission error (T.E.) for a given spur gear set, at the nominal torque, only by means of the profile modification parameters. Iterative simulations with advanced software, are needed. A hybrid method has been...
Proposes that tooth breakage at the tip of plastic gears is the result of interference on the back of the tooth. Provides verification of this interference through experiments. Explains how CAD software and plastic gear calculating software can simulate the kinematics of a gear...
This paper studies the effect of manufacturing errors on predicted dynamic factors of spur gears. Three dynamic factors are defined and studied: dynamic load factors, dynamic tooth force factors, and dynamic bending moment factors. Three computer programs for predicting dynamics are...
Military tracked vehicles demand a very compact transmission to meet mobility requirements. Some of the desirable characteristics of these transmissions include: increased rating, improved power to weight ratio, low operating noise and vibration, and reduced weight. To achieve all or some of these...
This paper presents a gear design optimization approach that was applied to reduce both tooth contact temperature and noise excitation of a highspeed spur gear pair running without lubricant. The optimum gear design search was done using the RMC (Run Many Cases) program...
Identifies scuffing as the main cause for limiting gear durability in highly loaded and high speed working gears. Notes that the principal way to avoid scuffing of tooth flanks is to apply an oil film of sufficient thickness between the mating flanks. Asserts that the shape of the...
