June 2017

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Feature Articles

Gear Grinding Today
New divisions, open houses and the continued rise of the Industrial Internet of Things - There's been a lot going on in gear grinding in the past year.

Wind Turbine Gearbox Reliability
A high number of wind turbine gearboxes do not meet their expected design life, despite meeting the design criteria of current bearing, gear and wind turbine industry standards and certifications.

Testing 1-2-3
Software updates for the gear industry. What's new and noteworthy in software applications in 2017?

Anatomy of a Rebuild
Nuttall Gear taps Machine Tool Builders for shop floor upgrades.

Technical Articles

Twist Control Grinding
This paper introduces the latest process developments for the hard-finishing of gears, specifically in regard to controlling the so-called flank twist.

Surface Structure Shift for Ground Bevel Gears
Ground bevel and hypoid gears have a designed motion error that defines parts of their NVH behavior. The surface structure is defined by the hard finishing process.

Designing Very Strong Gear Teeth by Means of High Pressure Angles
The purpose of this paper is to present a method of designing and specifying gear teeth with much higher bending and surface contact strength (reduced bending and surface contact stresses). This paper will show calculation procedures, mathematical solutions and the theoretical background equations to do this.

Departments

Get Smarter at Gear Expo (Publishers Page)
There are many benefits to attending Gear Expo, but if you're not taking advantage of the educational opportunities, you're missing out.

Product News (Product News)
The complete Product News section from the June 2017 issue of Gear Technology, featuring the latest from Liebherr, Heller, Sandvik Coromant, Mahr and more.

Ground and Hobbed Globoidal Worm Sets (Ask the Expert)
A reader wants to know: Are profile ground and hobbed globoidal worm sets better than multi-axis CNC generated globoidal worm gear sets for reduction of noise and vibration?

Calendar (Events)
The technical Calendar from the June 2017 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the June 2017 issue of Gear Technology.

Babbage's Engines (Addendum)
Though we think of the computer as a distinctly 20th Century invention, Charles Babbage designed several precursors way back in the early 1800s.