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INSPECTION/TESTING

Lubrication and its role in gear-failure analysis

When gears fail, it is most often due to fatigue and overloading. The most common form of distress and failure […]

Gasbarre Thermal Processing Systems

Gasbarre Thermal Processing Systems designs, manufactures and services a full line of heat treating equipment for virtually any process. Gasbarre’s […]

Multi-sensor metrology advances

Demand for accurate gears delivered on tight schedules is increasing. To keep pace, technology is continually advancing, enabling manufacturers to […]

New standardized calculation method of the tooth flank fracture load capacity of bevel and hypoid gears

Bevel and hypoid gears are widespread in automotive, industrial, marine and aeronautical applications for transmitting power between crossed axles. Future […]

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. […]

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: Promoting manufacturing efficiency with 3D optical metrology

Woodward Inc. works with leading optical metrology instrument supplier ZYGO to “tune” its manufacturing processes by leveraging precise 3D surface […]

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 […]

Conjugate Action Law in Intersected-Axes Gear Pairs and in Crossed-Axes Gear Pairs

The article deals with the kinematics and the geometry of geometrically-accurate gearing (with perfect gearing). Considered at the beginning for […]

Reliability of gears: Determination of statistically validated material strength numbers

One of the most important goals when designing a gearbox is to ensure a sufficient reliability in operation. Depending on […]

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 […]

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 […]

Online exclusive: How many mils is your coating?

Instantaneous handheld coating thickness gauges that can be operated by virtually any technician deliver lab-quality readings even on curved and […]

Two-Probe Pitch Inspection Method For Large Gears

A gear’s pitch (a k a index or spacing) accuracy is one of the most fundamental gear characteristics affecting its […]

Effects of Asymmetric Cutter Tip Radii on Gear Tooth Root Bending Stress

By Dr. Abdullah Akpolat, Dr. Nihat Yildirim, Burak Sahin, Omer Yildirim, Bulent Karatas, and Fatih Erdogan Tooth root fillet is the […]

Closed Loop Machining of Cylindrical Gears

Leonhard Euler’s 1760 invention of making cylindrical gears with an involute profile was the beginning of a success story. As […]

Advanced Thermal Processing for Enhanced Gear Tribology

Abstract Vast empirical knowledge accumulated over centuries, in conjunction with recent advances in the areas of material science, tribology, and […]

An Experimental and Analytical Comparison of the Noise Generated by Gears of Austempered Ductile Iron (ADI) and Steel Materials

Over the years, there have been many claims made concerning the relative noise performance of austempered ductile iron (ADI) versus […]

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