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Optical vs. Tactile Gear Measurement for E-Mobility

A practical comparison of fringe projection and conventional tactile systems for classic and waviness gear characteristics

In this project, a practical measurement comparison of conventional tactile and optical systems was done. The goal was to investigate if and how good the measurement results of classic characteristics and waviness characteristics of the different physical measurement principles are comparable. In addition, it was determined whether the use of optical fringe projection measurement systems is suitable for gear metrology.

The Doctor Is In

Inside Luftex’s five-pillar approach to gearbox repair

Systems Failure

Rethinking failure, replacement, and supply strategy in heavy industry

Automotive Brain Power

Four Key Takeaways from CTI Symposium USA 2026

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Technical Articles

Investigating the Effects of Wear, Lubrication and Material Pairing on the NVH Performance of Plastic Gears

This study systematically evaluates how material selection, progressive wear, and grease lubrication affect the noise, vibration, and harshness (NVH) performance of polymer gears, providing new insights for designing quieter, more optimized transmission systems.

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Design Principles of Bevel Gears: Rationale for Zero Sum Profile Shifts and Generating Gear Choices

This article demonstrates why bevel gears are designed with a zero sum of profile shifts—showing that independent shifts merely replicate what a modified pressure angle already achieves—and explains the practical benefits of using conical generating gears for tooth profile crowning.

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Water Spray Quenching—A New Intensive Quenching Process for Case Hardening of Gears

Water spray quenching achieves heat transfer coefficients up to 4,000 W/(m²K)—nearly double conventional oil quenching rates—enabling potential material substitution and tailored quench intensity for complex gear components.

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Smart Alloying Eliminates Manufacturing Steps in Automotive Gears

20NiMo9-7 alloy achieves up to 48 percent higher fatigue strength than conventional carburizing steels in the as-carburized condition, eliminating the need for shot peening and grinding in automotive gear applications.

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Design

The objective of this paper is to improve the methodology for determining the tooth flank temperature. Two methods are proposed for assessing scuffing risk when applying AGMA 925 for high-speed gears. Both methods provide similar results.

Grinding

The trend towards hard fine finishing of gears for automotive transmissions is accelerating. In recent years, the focus has been on increasing the efficiency of gears in order to make optimum use of the narrow gear ratio range, gear by gear, and to reduce fuel consumption. Surface finish, in particular, is under increased scrutiny since it plays such a decisive role in achieving the noise and efficiency requirements of gear units for today’s EV applications.

Inspection

A combination of international regulations and consumer expectations is driving the demand for reduced noise on all drivetrain components. Further demand is driven by the growing trend towards EVs and HEVs, where noise from ICE is intermittent or no longer present, and the contribution of transmission noise to overall vehicle noise becomes dominant.

Heat Treating

Gas carburizing has been around for a long time. One could argue that gas carburizing is the most common heat treating process. Heat treaters performing gas carburizing are often characterized by a dirty environment, hazy surroundings, and that “smell.” While the product quality may be acceptable, gas carburized parts do come with some challenges, like excessive intergranular oxidation (IGO) or intergranular attack (IGA), which is often ground off. Low-pressure carburizing (LPC) has proven to be a much cleaner and very capable alternative process. Most furnace companies have combined LPC with high pressure gas quenching, which moved carburizing from the dark back room to a relatively “clean room” environment. However, there is still a strong need for oil quenching, which is the common feature of the long used standard integral-quench (IQ) furnace.

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Videos

Forest City Gear Knows Robots!

Forest City Gear manufactures extremely high-precision gears made for the most advanced robotics, right in Roscoe, IL.  This family-owned team of gearheads specialize in high-precision gears engineered to handle the most demanding robotic applications—on Earth, and way beyond.

Industry News

ECM USA appointed Marco Möser to senior sales engineer for the western U.S. With more than 25 years of experience in the heat treatment industry, Möser brings extensive expertise in supporting OEMs on large-scale automotive programs.

Product News

Index Corp. will present manufacturers with a variety of strategies to streamline production at IMTS 2026, taking place September 14-19 at McCormick Place in Chicago, Illinois. Visitors to the company’s Booth #339119 in the South Building will witness the North American debut of multiple new machines, including an entirely new design concept tailored to small part production. The company will also demonstrate its full portfolio of proven advanced machine technologies, as well as provide insight into how manufacturers can produce every job faster to maximize profitability.

Calendar

RPM Symposium 2026

Sep 22, 2026 - Sep 23, 2026

The RPM (Reliability Process & Maintenance) Symposium (Kalamazoo, MI) is a conference event where end users can network and learn about industrial facilities, reliability, maintenance best practices, electric motor driven powertrains, and IIoT.

Advanced Manufacturing Expo (AME) 2026

Jul 29, 2026 - Jul 30, 2026

Furnaces North America (FNA) 2026

Oct 12, 2026 - Oct 14, 2026

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