Electric motors have become an integral part of modern life. Whether in household appliances, industrial systems such as drive and conveyor systems, or cutting- edge electric vehicles, they ensure efficient motion and play a key role in automation and electrification. With the growing focus on sustainability, electric motors are gaining even more importance. To ensure their reliable and efficient operation, high-quality rolling bearings are essential. Among them, deep groove ball bearings have proven to be an ideal solution. These bearings can accommodate both radial and axial forces in both directions while offering smooth operation and low friction. Additionally, they provide an excellent price-performance ratio and are widely available on the market.
To meet the growing demands of modern drive technology, selecting the right bearing solution is crucial. PICARD supports the technical specialist trade with a comprehensive portfolio of high-quality deep groove ball bearings, ensuring optimal performance and reliability in electric motor applications.
The Optimal All-Rounder
The use of deep groove ball bearings in electric motors offers numerous advantages. Their low friction and high efficiency contribute to energy-efficient operation, while durable materials, high-quality lubricants, and optimized seals ensure a long service life with minimal maintenance. Furthermore, deep groove ball bearings are available in a variety of designs to meet diverse application requirements.
The Benefits of CM Internal Clearance
A notable trend in the industry is the 52 Bearing News increasing preference for deep groove ball bearings with CM internal clearance in electric motors. Positioned between the reduced clearance of C2 and the increased clearance of C3, CM clearance offers optimal radial play that compensates for thermal expansion in both the shaft and housing. This design helps reduce friction and minimizes the risk of premature wear. At higher speeds and under substantial loads, bearings with CM clearance ensure improved lubricant distribution, enhanced operational stability, and a reduction in noise and vibration – factors that collectively contribute to superior performance and extended bearing life.
Electric Motor Quality – A Multifaceted Concept
The term “Electric Motor Quality” (EMQ) is often associated with premium performance characteristics such as low noise, minimal vibration, high precision, and an extended service life. However, there is no standardized definition for EMQ, meaning that criteria and evaluations can vary between manufacturers. As a result, it is worth comparing specifications from different suppliers to ensure the best choice.
Application Solutions for Various Electric Motors
The requirements for deep groove ball bearings differ significantly based on the size and application of the electric motor.
1. Small Electric Motors
Small electric motors are commonly found in household appliances such as washing machines, vacuum cleaners, and garden tools, where energy efficiency is paramount –especially in battery-operated devices. Bearings designed for these applications typically feature robust seals (often indicated by suffixes like “2RS” for rubber shields) to protect against dust and moisture. In addition, noise-reducing designs – such as those employing polyamide or polyetheretherketone (PEEK) cages with temperature-optimized lubricants –are available to ensure exceptionally quiet operation, an important factor in applications like electric vehicles.
2. Medium to Large Electric Motors and Generators
In industrial applications such as pumps, fans, and conveyor systems, medium-sized electric motors (ranging from 3 kW to 500 kW) demand continuous, reliable operation with minimal maintenance. Bearings used in these motors are typically larger (for example, models like 6312) and can be equipped with electrical insulation to mitigate the risk of stray currents. Insulation methods include aluminum oxide surface coatings on the inner or outer rings and the use of ceramic balls, which are especially effective at high speeds. Additionally, the incorporation of steel cages that optimize lubricant distribution –combined with automatic lubrication systems – further enhances operational efficiency and prolongs bearing life.
Deep Groove Ball Bearings in the PICARD Range
Deep Groove Ball Bearings in the PICARD RangeAs one of the largest wholesalers in Europe, PICARD offers a comprehensive selection of high-quality deep groove ball bearings from leading manufacturers such as Schaeffler (FAG, INA), NACHI, NKE, NSK, NTN, SKF, SNR, STC-Steyr, TIMKEN, and ZEN.
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This article is published in BearingNews March 2025 issue
