The paper examines how optimizing asymmetric gear tooth geometry through Direct Gear Design can improve load capacity, efficiency, and compactness in EV gearboxes, surpassing the performance limits of conventional symmetric gears.


This study examines the implementation and experimental validation of state-of-the-art plastic worm gear design methods, focusing on the VDI 2736 guideline as the most comprehensive reference for load-carrying capacity calculations.
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This paper will review the development process, current research status, characteristics, functions, and measurement methods of TE. It will analyze the difficulties and core issues existing in the basic theory of TE, clarify the limitations and deficiencies of TE, and explore ways to overcome the shortcomings of TE.
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This study explores the failure mode morphology of FZG-A test gears. It aims to examine the orphologies of scuffing, scoring, scratches, and polishing using high-magnification light optical microscopy (LOM) and scanning electron microscopy (SEM) images.
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High-performance plastic gears are increasingly replacing metal gears in several applications due to the many advantages they exhibit. The main ones are lower weight, no need for lubrication, cheaper mass production, significantly better noise, vibration and harshness (NVH) behavior and chemical/corrosion resistance. Most plastic gears are produced by injection molding, which enables great design flexibility, e.g., joining several machine elements into one molded part, while gear geometry modifications like enlarged root rounding or altered profile shapes are also possible (Ref. 1).
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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.

Overall developments and widespread public awareness of man-made climate change are transforming the way people think. The awareness has inspired a shift towards a more ecologically sustainable way of life. Driven by policymaking and technological innovation, ambitious efforts are underway to reduce greenhouse gas emissions to curb the rise in average temperatures. A key focus of these efforts is the mobility sector.

In conventional gear manufacturing, quality control is carried out for a number of pieces per batch. Most parts enter final gearbox assembly without any inspection. Among other things, this approach is based on two facts: measuring time is significantly longer than the machining time, and the limited measuring capacity available.

Various in-situ methods can track realtime heat treatment response in bulk materials. This can aid material engineers in designing the most effective heat treatment procedures and processing methods. In-situ methods such as thermogravimetry (TG), differential thermal analysis (DTA), and dilatometry, offer capabilities to examine heat treatment behavior in real time, giving insight into the thermochemical mechanisms and the thermal behavior of steel.
Discover how SECO/WARWICK’s PIT-LPC furnace cuts cycle times by 60%, doubles throughput, and eliminates CO₂ emissions. Learn how vacuum carburizing redefines performance, safety, and sustainability in large-part heat treatment.
Spiroid Gearing delivers precision gearing for advanced mechanical systems engineered to handle extreme torque and complex motion requirements. With unique right-angle gear solutions, our technology enhances efficiency, reliability, and design flexibility. This empowers engineers to push boundaries in aerospace, defense, robotics, and industrial applications where performance and durability are non-negotiable.
CNC Gear Machine Tools: The Strategic Case for Re-controlling AND Re-building Versus New
Setting up an in-house heat treating operation allows businesses throughout many industries to harness this powerful technology and create better-quality metal parts. In this article, Surface Combustion discusses the biggest cost considerations involved in purchasing in-house heat treating technology and investment strategies to ensure you maximize your ROI.
With the introduction of the new 175GMS nano Gear Metrology system, Gleason brings its renowned “nano” sub-micron level inspection capabilities to smaller gears, helping ensure minimal noise, greater precision, and longer life.
At American Precision Gear, quality isn’t just a priority — it’s the foundation of everything they do. The shop specializes in high-precision miniature gears for aerospace, defense, and medical applications, where the strictest tolerances are non-negotiable. Helios Gear Products partnered with American Precision Gear to integrate the MZ 1000 D-Drive into their production.
Gleason Corporation’s Prof. Dr. Hermann J. Stadtfeld, Vice President of Bevel Gear Technology and R&D, has been awarded a new patent for his latest invention, “Psychoacoustic Tooth Flank Form Modification”—also known by its working name MicroForm. The innovation marks his 70th patented invention, continuing a career dedicated to advancing the science and manufacture of bevel gears. Gear Technology caught up with Dr. Stadtfeld to field a few questions about this latest milestone.

GWJ Technology GmbH from Braunschweig presents the new version of its SystemManager, which serves as an extension for the established calculation solutions eAssistant and TBK. With numerous innovations and optimizations, the software provides engineers with enhanced capabilities for modeling, calculating, and analyzing complex drivetrain systems.
Feb 10, 2026 - Feb 12, 2026

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