A new approach for the calculation of worm shaft deflection in worm and crossed helical gear drives
Worm gear drives are characterized by a simple design, which allows the realization of a high gear ratio within one […]
Multi-sensor metrology advances
Demand for accurate gears delivered on tight schedules is increasing. To keep pace, technology is continually advancing, enabling manufacturers to […]
Finding the ideal materials for gears
When designing an individual gear or a gear train, the choice of material will either be the primary factor on […]
Leveraging the complementary strengths of orbitless and planetary drives
An orbitless drive is a novel, fixed-ratio, epicyclic drive that includes a second carrier in place of a ring gear. […]
The benefits of splines
What is a spline? According to the American Heritage Dictionary of the English Language, a spline is defined as: Noun: […]
Bringing forging equipment online to meet expanding production requirements
When forging operations need to expand production to meet increased demand for existing parts or to add new product lines, […]
Tooth root testing of steels with high cleanliness
The power density of gearboxes is continuously increased through different research activities. Besides new material developments, steel cleanliness comes to […]
Inspection & Metrology: Laser interferometry – An enabling technology for optimized automated manufacturing
Technological advances over recent years have elevated metrology from being a “necessary evil” in manufacturing scenarios to enabling technologies, allowing […]
Optimization of asymmetric tooth root generated with protuberance hob
The Direct Gear Design [1] method optimizes various parameters and elements of gear tooth geometry to achieve the required gear-drive […]
Performance and properties of a new alternative gear steel
In the ongoing strive for light weighting or power densification, high-performance clean steels are showing a significant improvement. As a […]
Opportunities of Efficiency Improvement by the Use of Hydro Lubricants
1 Introduction Although different base oil types exist in the market and are widely in use, the majority of industrial […]
Integrated Approach for Gear Testing of High-Performance Clean Steels
The power density of gearboxes is continuously increased by different research activities. Besides new material developments, the cleanliness of steels […]
Experimental tests to predict plastic gears’ lifetime
One of the major problems of plastic gears is the lack of data about their lifetime. Literature doesn’t contain numerous […]
Root cause for noise excitation in geometrically-accurate (perfect) parallel-axes gearing
Gears are extensively used to transmit a rotation from a driving shaft to a driven shaft. Depending on the gear […]
Using simulation to evaluate part green shape to reduce distortion during plug quenching
Determining the heat-treatment geometry (green shape) for complex gears is not a trivial task. Mass distribution becomes critical in determining […]
Filling Some Gaps in Spline Design Guidelines: Centering, Friction, and Misalignment
Editor’s note: At the author’s request, some statements have been removed for clarity since the article was originally published in October, […]
Methods to Determine Form Diameter on Hobbed External Involute Gears
In custom designs of external spur or helical gears, designers generally prefer a lower form diameter for greater transverse contact […]
Design features of worm gearing composed of plastic and/or powder-metal components
This article deals with worm gearings in cases when the worm-gear pair is composed either of plastic or of powder-metal […]
Lean Heat Treatment for Distortion Control
Controlling distortion is of key importance during the case hardening process for the production of gear components. By effective control […]
Inspection & Metrology: ‘We must never stand still’
Small series and prototype production at ZF Friedrichshafen AG create new challenges for quality control time and again: measurement programs […]
