We have all seen the Q4 2025 headlines around electric vehicle (EV) sales and they were not good. Ford recorded a $19.5B loss in EV pullbacks (Ref. 1). General Motors posted $6B in EV debt (Ref. 2). Stellantis took a $26B hit which was compounded by underperforming EV sales and recovery from the previous CEO’s disastrous cost-cutting strategy (Ref. 3). Also, notably, was the laundry list of not-long-ago hailed startups that have went bankrupt, often leaving investors, suppliers and employees holding the bag: Bollinger, Canoo, Nikola, ELMS, Lordstown, Fisker, Arrival, Proterra, Volta just to name a few. Many more are on the brink along with dozens of startup suppliers that enticed investors with untold wealth to be gained in the automotive revolution 2.0 (Ref. 6,13,14).
According to a recent study by Deloitte, the aerospace and defense industry stands at a pivotal crossroads as it enters the latter half of the decade. Forces that have shaped the sector in recent years—digital transformation, supply chain volatility, talent constraints, and geopolitical events—are converging with new catalysts such as agentic AI, emerging vehicles and the rapid evolution of autonomous systems. On the defense side, budgets are a key focus, with a growing emphasis on enhancing mission readiness. At the same time, defense priorities are shifting to accelerate the fielding of AI-enabled systems and collaborative combat aircraft. “Speed to field” is becoming the unifying metric across portfolios. (deloitte.com)
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The load limit diagram of a motor spindle serves to graphically represent the permissible operating range as a function of parameters such as rotational speed. It enables a quick assessment of the conditions under which the spindle can be operated safely and reliably without exceeding mechanical, thermal or dynamic limits. Such a diagram is a key tool for the design, selection and evaluation of spindle systems in mechanical engineering particularly in the field of machining where high demands are placed on precision, performance and service life.
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When Australian steelmaker InfraBuild needed two new circuit breakers to provide backup for its main electric arc furnace, ABB had the solution—its VD4-AF vacuum circuit breaker with an innovative servomotor actuation system that delivers more than five times the operations of a standard breaker, supporting greater reliability and safety as well as lower operational costs.
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Mechanical engineering develops the scientific and mathematical principles behind physical machines, but you can’t help feeling a little real-world magic taking place in the manufacture of components needed for large, heavy industrial applications. Cement production, for example, relies on gigantic equipment to grind raw materials using rotary kilns, ball mills, vertical mills and crushers.
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This article is Part III in a series of articles on speed rating of bearings. Part I appeared in the September 2022 issue ("Ball Bearing Limiting Speeds"), and Part II appeared in the October 2022 issue ("Ball Bearing Thermal Speed Rating"). Bearings with Norm examines the latest in bearing technology and design.
In the highly competitive gear manufacturing industry, Master Power Transmission (MPT) recognized the need for innovation. To achieve this, MPT partnered with Ready Robotics, undertaking a transformative journey into advanced automation through their Automation Readiness Assessment (ARA).
It’s an exciting time in the electric motor industry. In the past two years more truly innovative new technology development has occurred than in the previous two decades. We can thank the e-mobility movement for that. It’s not just cars, trucks, bikes and buses, but just about everything else that moves on wheels as well as on water and in the sky.
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 - empowering engineers to push boundaries in aerospace, defense, robotics, and industrial applications where performance and durability are non-negotiable.
The drive system choice is dependent on key motion features of your application. Lead screws offer self-locking capabilities, while ball screws require brakes to prevent back-driving. The choice between them hinges on efficiency, cost, precision, and speed, with the screw drives themselves paired with a linear guide for optimal performance.
Bellows couplings are commonly used in applications requiring precise rotation, high speeds, and dynamic motion transmission. With zero backlash and a high level of torsional stiffness, they offer clear performance advantages in many servo-driven systems.
The Simplicity self-lubricating linear plain bearings are built to last, and they will often out-perform and last longer than a traditional linear ball bearing. Called the “little red bearing” by loyal customers, they have been a popular replacement for failing ball bearings. Simplicity plain bearings will not catastrophically fail.
The difference between a smooth-running drive and constant headaches? The right timing belt and pulley plus a whole lot more. Discover what works, what doesn’t, and put your design skills to the test—engineer your best system yet!
Elevate the aerospace program with AMETEK PDS. See how their complete actuation systems, designed by a team of experienced engineers, can meet your specific needs—from a single actuator for a cargo door to a full flap actuation system with motors, actuators, and system-level controllers.
Apr 10, 2026
Siemens has announced the appointment of Ann Fairchild (54) as president and chief executive officer (CEO) of Siemens USA, the company’s largest market globally. Fairchild, who has served as interim president and CEO since October 2025, will assume the permanent role effective immediately. She will guide Siemens’ strategy and engagement across the United States, where the company employs more than 50,000 people in all 50 states and Puerto Rico and generated $24 billion in revenue in fiscal 2025.
ABB expanded the availability of Vertical Hollow Shaft (VHS) motors to meet Mexico’s growing water industry needs by obtaining its NOM/ANCE certification. Designed for vertical pumping applications, ABB VHS motors are engineered for critical industries including agriculture, mining, municipal water, wastewater treatment and industrial processing.
Apr 14, 2026 - Apr 16, 2026
Rapid + TCT is North America’s premier additive manufacturing (3D printing) event. The show includes an AeroDef Manufacturing showcase for aerospace and defense. Rapid examines how machine shops integrate additive manufacturing to reduce lead times, produce complex geometries and manufacture tooling in-house. The show provides insights into how additive complements traditional machining. The show takes place at the Thomas M. Menino Convention & Exhibition Center, Boston, MA.
Jul 15, 2026 - Jul 16, 2026
Jun 9, 2026 - Jun 11, 2026
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Power Transmission Engineering is THE magazine of mechanical components. PTE is written for engineers and maintenance pros who specify, purchase and use gears, gear drives, bearings, motors, couplings, clutches, lubrication, seals and all other types of mechanical power transmission and motion control components.
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