Free Standards Download

Primary-level calibration of master gears requires quantifying the measurement uncertainty on the artifact being calibrated by a method that does not rely on a transfer comparison. The measurement decomposition method, developed jointly by National Institute of Standards...

A modified geometry of face-milled spiral bevel gears with uniform and tapered teeth that provides a localized bearing contact, reduces the level of noise and increases the strength of the teeth has been developed. The modified geometry...

Controlled Shot Peening has long been recognized as a very effective process to prolong the fatigue life of all types of gears. Three recent innovations have extended the state of the art: 1) by a process that...

Recent advances in the speed and memory capacity of current computers combined with H- -adaptive finite element theory permit the development of more realistic finite element gear strength models. The speed and memory improvements allow for increased...

This paper investigates the following present globoidal wormgear drives: (i) original and modified Hindley wormgear drives; (2) Wildhaber worngear drive with inclined plane teeth of wormgear; (3) inclined plane and cone enveloping globoidal wormgear drives; (4) piane,...

From the balance between tbe generated heat io a gear box and the dissipated beat from the gear case surface the mean value for the expected lubricant temperature can be evaluated. The maximum oil temperature in a...

Finite element analyses were performed during design and development of the F22 AMAD gearbox to ensure a design free of damaging resonant responses within its operating speed range. Ideally, design with respect to resonance characteristics would bave...

For years, the intemational gear manufacturing industry has been pushing machine manufacturers to develop an economical realizable tooth flank modification that is made in contact direction, with a soft transfer from the modified to unmodified sections of...

An experimental and analytical study of spiral bevel gears operating in an aerospace environment has been performed. Tests were conducted within a closed loop test stand atNASA Lewis Research Center. Tests were conducted to 537kW (720 hp)...

Two groups of spur gears mandamred from two different materias and heat treatments were endurance tested for swhcefatiguelife. One group wasmanufacturedfiom AISI 1552andwas fínished -dto 0.4 pm (16ph) mis d a c e nnishaud the0 diial fquency...