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Beyond the Involute

Tooth forms tuned for EV power density, and a production suite that now spans compound planetary design, linked skiving-honing simulation, and on-machine measurement

Dontyne has invited several automotive companies to present applications to assess the suitability of non-involute technology. There are not always advantages over involute designs, but EV applications seem especially suited, and 15–25 percent power-density gains are typical. There are also consequential benefits, such as reduced gearbox housing and transport costs. 

Complexity Without Compromise

Five-axis machining provides high-speed, high-accuracy for the future of part design

Skiving’s Motion, Grinding’s Finish

A new process runs skiving kinematics with an abrasive CBN tool, targeting a long-standing gap in internal-gear finishing

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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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Conjugate Bevel and Hypoid Gears

An excerpt from Gear Technology Solutions by Dr. Hermann J. Stadtfeld exploring the mathematics behind conjugate bevel and hypoid gears—from the fundamental laws of gearing and the conditions for perfect conjugacy to why real-world power transmissions require deliberate crowning rather than theoretically exact conjugate designs.

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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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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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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

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

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

Heat Treat 2023 is the Heat Treating Society’s 32nd conference and expo for heat treating professionals featuring three days of face-to-face networking opportunities with approximately 200 heat treat exhibitors/companies. All the top heat-treating companies will offer the latest research and industry insights during more than 100 technical programs. This year’s show includes a VIP-guided industry tour, as well as student/emerging professionals initiatives, including free college student registration, Fluxtrol Student Research Competition, and the ASM Heat Treating Society Strong Bar Student Competition. Heat Treat 2023 is colocated with Motion + Power Technology Expo 2023 with access to additional exhibitors. The event takes place October 17–19, 2023 at Huntington Place in Detroit.

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Videos

Diamond Dressing Wheels by Kapp Niles

Kapp Technologies L.P., the North American subsidiary of the Kapp Niles Group, has taken a significant step toward strengthening its domestic manufacturing capabilities. The company has successfully launched in-house production of diamond dressing tools at its Boulder, Colorado facility — marking a major milestone in its U.S.-based operations.

Industry News

Rapid Gear, based in Kitchener, Ontario, marked its 50th anniversary with a company picnic attended by employees and Kitchener Mayor Berry Vrbanovic.

 

Product News

At IMTS 2026, Mitsubishi Electric Automation will feature live demonstrations of LoadMate Plus and ARIA, two pre-engineered robotic machine tending solutions designed to help manufacturers automate CNC mills and lathes with confidence, flexibility, and scalability. Automated machine tending enables longer spindle uptime, improved process consistency, and redeployment of skilled workers to higher-value tasks. Robotic tending also reduces unplanned downtime and supports lights-out or extended hours.

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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