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Twenty Years of Pulsator Tests on Helicopter Gears

Leonardo Helicopters’ 20-year, 650+ test campaign characterizing tooth-root bending fatigue strength across gear materials, heat treatments, and finishing processes (notably shot peening and superfinishing) to support aerospace gear design.

Perceive, Understand & Perform

AICA and Schaeffler demonstrate the role Physical AI can play in the manufacturing environment

Automation for Every Shop Size

A new CNC-based application puts cost-effective robot part handling and articulation directly on the machine tool’s control screen, eliminating the need for a separate robot pendant

METAL’s Manufacturing Workforce Network

A DoW-funded partnership brings online courses and hands-on bootcamps to Purdue’s foundry lab, training that feeds gear production

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Technical Articles

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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Root Interference

This excerpt from Gear Technology Solutions explains how oversized cutter blade edge radii cause root interference in bevel gears, and how to select correct radii to avoid noise, flank damage, and tooth fracture.

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Design and Load Capacity of Crown Gears in Comparison to Bevel Gears

Through loaded tooth contact analysis of two applications, this paper demonstrates that crown gears can match bevel gear load capacity while offering meaningful advantages in weight reduction, axial-force-free pinion mounting, and assembly simplicity.

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Analytical Calculation of the Gear Body Stiffness of Face Gears

This paper presents a new analytical method using plate and disk mechanical models to calculate the gear body stiffness of face gear wheels, showing that stiffness decreases toward the outer radius—a behavior that conventional cylindrical gear approaches fail to capture.

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Design

Variable loads resulting from a working process, starting process, or operation near a critical speed will cause varying stresses at the gear teeth of a drive system. The magnitude and frequency of these loads depend upon the driven machine, the motor, the dynamic mass elastic properties of the system, and other effects.


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

When electric drives are used in vehicles, the masking effect of an internal combustion engine disappears, allowing the noise behavior of the transmission to take center stage. At the same time, peak power and torque increase, engine speeds increase, and power must be transferred optimally in both directions due to the regenerative braking system. Conventional design parameters remain important, however: The build space is limited, durability must not be compromised, and the product must still be cost-efficient. Optical metrology as part of a hybrid measurement concept helps to overcome all these challenges.

Heat Treating

Quality control, EV components, energy consumption and material influences are just a handful of topics being discussed in heat treating today. New heat treat methods and global trends will be the topic of conversation later this year at Heat Treat 2023. Here’s a round-up of some stories circulating across key market segments.

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Videos

Liebherr Hobbing Machine LC 280 DC with FlexChamfer

​The LC 280 DC gear hobbing machine from Liebherr is designed for precise gear cutting up to module 4.5 mm. It combines high productivity with advanced technology, featuring simultaneous FlexChamfer for efficient deburring and chamfering during the hobbing process.

Industry News

ANCA announced the appointment of Edmund Boland as group chief executive officer.

Product News

GWJ Technology GmbH has released a new version of its GearEngineer software.

Calendar

CTI Symposium Berlin 2026

Dec 8, 2026 - Dec 9, 2026

CTI Symposium Berlin offers active discussions on the latest technologies and strategies on automotive transmissions and HEV & EV drives for passenger cars and commercial vehicles. At CTI Symposium Berlin, more than 650 senior experts and decisionmakers from OEMs, Tier 1 suppliers, technology companies, and research institutions come together to discuss the latest developments in electrified drivetrains, hybrid technologies, energy systems, software integration, and future mobility strategies.

RPM Symposium 2026

Sep 22, 2026 - Sep 23, 2026

Furnaces North America (FNA) 2026

Oct 12, 2026 - Oct 14, 2026

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Buyer's Guide

Cutting Tools Gear Blanks & Raw Material Gear Drives Gear Machines Gear Manufacturing Services Gears Grinding Wheels & Abrasive Tools Heat Treating Inspection Equipment Lubricants Machine Tools Resources Services Software Used Machinery Workholding & Toolholding

The Gear Industry Buyers Guide is your complete directory of suppliers in the gear industry, including great companies like these.


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