As global electric vehicle motor market accelerates, demand for precision-engineered shims, retaining rings and powder metallurgy parts reaches new heights

The rapid electrification of the global automotive industry is reshaping not only how vehicles are powered—but also the precision manufacturing ecosystem that supports them. With the global electric vehicle (EV) motor market valued at USD 27.16 billion in 2025 and projected to reach USD 90.49 billion by 2034 at a CAGR of 12.23%, the spotlight is increasingly falling on the critical components that enable EV motors to achieve the efficiency, reliability and compactness demanded by next-generation electric drivetrains.

Beyond the headline-grabbing battery and semiconductor sectors, engineers and procurement specialists alike are recognizing that precision parts—shims, retaining rings, circlips and powder metallurgy components—play an outsized role in motor performance, noise reduction and long-term durability.

Small Parts, Big Impact: Why Precision Matters in EV Motors

Unlike traditional internal combustion engines, electric motors introduce a distinct set of engineering challenges: extreme rotational speeds, stringent noise-vibration-harshness (NVH) expectations, and very tight tolerances for manufacturing variations-. EV drive shafts can now reach 15,000 rpm or more, placing unprecedented stress on every component within the motor assembly.

In high-rpm applications, retaining rings—which secure bearings, gears and other rotating components on shafts—are subjected to centrifugal forces that can cause conventional snap rings to expand and lift out of their grooves, leading to catastrophic assembly failure. This has driven demand for self-locking retaining ring designs capable of withstanding higher rotational speeds without sacrificing retention force or design precision.

Shims and precision spacers are equally vital. Manufacturing tolerances in motor structural parameters—such as air gap uniformity, stator inner diameter and magnet dimensions—directly influence torque output, efficiency and NVH behavior-. Even minor geometric deviations can amplify torque ripple and increase vibration, degrading the driving experience and shortening component life.

Powder Metallurgy Gains Traction in E-Axle Manufacturing

Another trend reshaping the precision parts landscape is the rise of powder metallurgy (PM) for EV-specific components. According to DIResearch, the global powder metallurgy market for electric vehicles is expected to grow from USD 699 million in 2025 to USD 3.47 billion by 2032, representing a remarkable CAGR of 25.74%.

Powder metallurgy is increasingly used to produce motor rotors, stators, and complex gearbox components for e-axles. The process offers unique advantages for EV applications: near-net shape manufacturing reduces material waste, eliminates secondary machining operations, and achieves high-strength, lightweight designs that are difficult to produce through conventional forging or casting.

A Full-Service Precision Manufacturer Rises to the Challenge

Amid this rapidly evolving landscape, Zhuhai Hongjun Technology—a specialized manufacturer based in Doumen District, Zhuhai City—has positioned itself as a responsive and reliable partner for EV motor suppliers and transmission manufacturers worldwide.

The company focuses on the R&D, production and sales of precision shims, retaining rings, circlips and powder metallurgy components, with outer diameters ranging from 3mm to 350mm—covering virtually all conventional bearing and motor assembly requirements. Its products are already deployed in electric vehicle drive motors, automotive transmissions, robot reducers, and high-voltage charging plugs for new energy vehicles.

One of the company‘s key differentiators is its fully integrated in-house production chain, from raw material processing to finished parts. With hundreds of standard sizes maintained in stock and support for prototype sample trials, Zhuhai Hongjun Technology enables same-day shipping and rapid turnaround—a critical advantage for OEMs and Tier 1 suppliers operating under tight production schedules.

“Our customers in the EV motor industry can‘t afford long lead times or inconsistent quality,” a company spokesperson noted. “By controlling every stage of manufacturing and maintaining deep inventory across our product range, we deliver stable, reliable and efficient solutions—on time, every time.”

Looking Ahead: The Precision Era of E-Mobility

As global electric vehicle adoption accelerates—Global Market Insights projects the automotive electric drivetrain components market to grow from USD 63.4 billion in 2025 to USD 488.8 billion by 2035, at a CAGR of 24.1%—the demand for precision-engineered components will only intensify.

From high-rpm retaining rings that secure critical rotating assemblies to powder metallurgy parts that enable lightweight e-axle designs, the precision parts industry is quietly but powerfully enabling the future of sustainable transportation.

For manufacturers seeking a trusted partner in this space, Zhuhai Hongjun Technology offers the product breadth, manufacturing depth and delivery speed required to succeed in the fast-moving EV supply chain.