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The Intrinsic Pitch Cones in Hypoid Gears

A method to calculate pitch cones for hypoid gears using macrogeometry parameters—similar to non-offset bevel gears—while accounting for the added complexity of hypoid offset, tooling, and cutting technology is explored in this paper.

Keeping Tomorrow Moving

Highlights and innovation at MPT Expo + Heat Treat 2025

Precision Under Pressure

Meeting the demands of modern gear grinding

Eliminating Gear Noise Before It Starts with Inline Process Monitoring

Detecting micro-deviations on gear geometries at an early stage to eliminate increased noise emissions

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Technical Articles

3D Scan-Based Reverse Engineering of Differential Bevel Gears

This study aims to propose a robust reverse engineering methodology for straight bevel gears, especially for those found in inter-wheel differentials.

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Experimental Study on the Performance of Plastic Worm 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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Nanocomposite Coatings for Gears

This work aims to demonstrate the potential benefit of applying nanocomposite coatings to gear teeth to reduce operating friction and wear by presenting tribological test data.

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Morphology of FZG-A Test Gears

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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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

From the outside, Gallmar Industries, nestled into an Oshkosh, WI, neighborhood, looks like any unassuming, medium-sized gear shop. Then take a plant tour with Gallmar’s VP of Operations Kenan Zolota—and prepare to be amazed. The facility stretches on like the Army’s warehouse at the end of Raiders of the Lost Ark, with everything from gear cutting to heat treat, gear grinding to inspection, all under one roof. Gallmar’s breadth of product line is in evidence too: defense-related transmission gears, 60-in. diameter internal gears for mining equipment, axle components for fire/ rescue trucks five feet in length, right down to a bin of brass ammunition casings that Zolota says are a special order.

Inspection

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.

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

Penta Gear Focus

As a brand of Kapp Niles, Penta Gear designs, manufactures, and installs analytical metrology machines, while performing as a trusted source for contract gear and spline inspection.

Industry News

The Klingelnberg Group had the honor of welcoming representatives of the Japan Gear Manufacturers Association (JGMA) on 25 November 2025, at its locations on Gustav-Adolf-Klingelnberg-Straße in Hückeswagen-Winterhagen and Peterstraße in Hückeswagen (Germany).

Product News

HWR Workholding USA has launched a pair of new products designed to further support manufacturers seeking efficient and reliable automation systems. The INOFlex VF-A hydraulic 4-jaw chuck offers exceptional performance in turning applications, while the SOLIDPoint Pneumatic Coupler simplifies integration of SOLIDLine modular zero-point workholding with an existing pneumatic system.

Calendar

AIoT World Expo 2026

Feb 10, 2026 - Feb 12, 2026

The AIoT World Expo (Fort Lauderdale, FL) is the premier event for exploring the convergence of Artificial Intelligence (AI) and the Internet of Things (IoT). This event serves as the gathering point for industry professionals to discover advancements, market opportunities, and understand the transformative power of AIoT across industries. Technologies include scalability, Edge, and AI data analytics, cloud solutions, machine learning (ML), and predictive analytics, cyber security and hybrid models.

CES 2026

Jan 6, 2026 - Jan 9, 2026

PowerGen 2026

Jan 20, 2026 - Jan 22, 2026

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