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Enclosed Gearing

Planetary Gear Parametric Instability

Parametric instability is investigated for planetary gears where the fluctuating stiffness results from the changing contact conditions at the multiple […]

Harnessing the Horsepower Thief

Microscopic examination of the traditionally ground tooth surfaces of automotive transmission gears reveals a micro-roughness and unidirectional pattern corresponding to […]

Gearing Up for Improved Performance

Innovative engineering design, advanced materials, and top of the line components can yield significant improvements in gearbox efficiency, reliability, and […]

An Animated Approach to Plotting Profiles

Trochoid Spiral (TS) and Epitrochoidal Spiral (ETS) curves and special flash animations were developed by the author in 2004 and […]

Making a Case for PVD Recoating Systems

Muncie Power Products, Inc., of Tulsa, Oklahoma, has been in the auxiliary power business since 1935 and started manufacturing Power […]

New Powder Applications

Powder Metallurgy is a proven technology to produce high strength gears and tailored gear shapes for both automotive and industrial […]

Special Section: Keyseating

Mitts & Merrill Mitts & Merrill’s desire to be the most innovative company in the keyseating and profiling market has […]

Profile Relief and Noise Excitation in Helical Gears

Gear noise results from the gear mesh dynamic forces that are transmitted through the support shafts and bearings to the […]

Are Energy Answers Blowing in the Wind?

Renewable Wind Energy Production (RWEP) in Wyoming has been related to three locations in the state: Cheyenne, Arlington, and Evanston. […]

Designing Gears Through the Years

In the past 50 years, we’ve certainly come a long way in terms of our gear design and problem-solving capabilities. […]

An Optimized Approach to Straight Bevel Gear Design

The optimal — or “rational” — design of gears can be a challenge due to the high number of variables, […]

The Advent of OptiGearing

Introduction A 25 to 35 percent increase in power density and a markedly lower operating noise are two major performance […]

Animated CAD Solutions for Gear Mechanism Design

Two-dimensional and 3D CAD programs have continually lessened the role of the engineer in the actual process of designing gears, […]

Polyglycols for Lubricating Large Gear Drives

Introduction In modern-day gear technology, the lube oil used is an important element of the gear’s overall design. Increasingly stringent […]

Determining the Source of Gear Whine Noise

Gear whine noise, particularly in consumer products such as motor vehicles and appliances, is an important and annoying problem. This […]

Direct Gear Design Drives Performance

Modern gear design based on the gear rack generating process was introduced in the 19th century and remains the only […]

Nachi’s Dry-Cutting Philosophy

As with all manufacturing processes, the focus remains on piece cost and workpiece quality. Piece cost is primarily composed of […]

The Simultaneous Dual Frequency Method of Inductive Gear Hardening

Inductive surface hardening is an attempt to harden only the surface of a structure without affecting the inner portions of […]

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