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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.

High-Volume Holemaking for Gear Production Success

Consider exchangeable-tip solid round cutting tools for durability, precision, and performance

Gear Heat Treatment Selection with a Duty Test Matrix

A practical framework for matching requirements to process routes and proof tests

Drivetrain Integration

Flender unveils the next generation of wind gearboxes

Profile Grinding of Large Gears

Increasing material removal efficiency through advanced infeed strategies

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Technical Articles

Design Method of System Tolerances in Cylindrical Gearboxes for Cost-Efficient Optimization of the Excitation Behavior

The article proposes a method to optimize cylindrical gearbox tolerances by balancing gear noise performance and manufacturing costs using modeling, analysis, and meta-model-based optimization.

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Interchangeability of Gears

An excerpt from Gear Technology Solutions by Dr. Hermann J. Stadtfeld covering when and how individual bevel gear members can be replaced during gearbox service without changing the mating gear.

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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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Influence of Tooth Root Contour Deviations on the Tooth Bending Strength

This study investigates how manufacturing-related geometry deviations in the tooth root area affect gear bending strength calculations, demonstrating that accounting for measured tooth contours rather than nominal geometries is essential for accurate material comparisons in fatigue testing.

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Design

As a community, we gear engineers collaborate and share ideas to progress our collective capability. Technology progresses based on our efforts, and we have seen solid advances in the performance of our products as they become quieter, cheaper, more efficient, and more power dense. The pages of this magazine (past and present editions) are filled with examples where talented engineers have dug deeper into a subject using a more precise approach to a particular area concerning gear performance. The implied belief is always that greater precision (complexity) in the calculations brings greater accuracy (alignment with reality).

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

Gear inspection has long been a highly specialized, costly investment and an overall challenging part of the gear manufacturing process. Through advances in technology and automation, this typically tedious, time-consuming process is becoming significantly
more efficient as multisensor coordinate measuring machines (CMMs) gain more traction as one of the preferred methods of gear inspection.

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Videos

Helios Gear Helps American Precision Gear Achieve Quality and Productivity

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.

Industry News

The Motion + Power Manufacturers Alliance (MPMA) today announces new Board, Officers, and other leadership changes for 2026–2027. Joining the Board of Directors are Michael Kapp, General Manager of KAPP NILES and Jared Scott, National Training Manager, SEW-Eurodrive.  MPMA members elected the two leaders at their Annual Meeting, held April 23-26 at the Sunseeker Resort in Port Charlotte, FL.  They will begin their three-year terms at the August 2026 Board Meeting.

Product News

L.S. Starrett Co. launched the HDV250. This next-generation digital comparator is engineered to deliver superior surface illumination, clearer image quality and enhanced measurement accuracy for manufacturing environments.

Calendar

Furnaces North America (FNA) 2026

Oct 12, 2026 - Oct 14, 2026

FNA (Indianapolis) is produced by the Metal Treating Institute (MTI) with media partner Heat Treat Today. The heat treat-only trade show and technical conference includes the latest products and technologies on industrial furnaces and ovens, atmosphere generation and control, quenching systems and quenchants, induction heating equipment, vacuum furnaces and pumps, heat treat software and controls and more

TPS (Turbomachinery & Pump Symposia) 2026

Sep 22, 2026 - Sep 24, 2026

WZL Gear Conference USA

Jul 15, 2026 - Jul 16, 2026

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