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September 3, 2020

NTN boosts ball bearings for electric motors fitted to EVs

NTN Corporation is expanding the mass-production and delivery of a  high speed deep groove ball bearing developed for motors fitted to electric vehicles (EV) and hybrid electric vehicles (HEV).

By Sam Duke

NTN Corporation is expanding the mass-production and delivery of a  high speed deep groove ball bearing developed for motors fitted to electric vehicles (EV) and hybrid electric vehicles (HEV).

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As motors for EVs and HEVs are becoming more compact and lighter, NTN says it has overcome the issues of the conventional product and achieved a higher rotational performance.

Motors for EVs and HEVs have been reduced in size and weight to save electricity and fuel efficiency. In order to achieve more compact size and lighter weight while maintaining the motor’s output torque, bearings for motors needed excellent high speed rotation performance. However, to realize high speed rotation, there have been problems such as distortion and damages of retainer caused by centrifugal force.

The product NTN has developed in 2015 is designed to enhance the strength of retainer by reviewing the materials of retainer. In addition, the pockets where the retainer contacts with rolling elements are designed to minimize distortion caused by centrifugal force, thereby it achieves high speed rotation performance – NTN claims. The dimensions are the same as conventional product, so it can replace the conventional product.

The product is developed mainly for grease lubrication, but it can also be applied under oil lubrication. Depending on the usage conditions, it can be used for high speed rotation with dmn value 1.5 million. In recent years, there has been an increasing trend for motors with oil lubrication, which has excellent cooling effects in order to suppress motor heat generation. Under these situations, NTN has received a large number of requests for oil lubrication and been expanding mass-production and delivery.

With the spread of EVs and HEVs, demand for this product adapting to high speed rotation is expected to increase into the future. NTN says it will continue to contribute to electrification and energy and fuel efficiency savings of automobiles through providing this product into the market.

Free Report
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What does the future hold for the US electric vehicles market?

The US Electric Vehicles (EV) market has established itself as one to watch. Despite China maintaining the number one spot, the US holds significant standing as one of the major EV markets, with GlobalData’s whitepaper identifying a strong growth trajectory within the forecast period. This report further analyzes the trends, market drivers, and government incentives set to influence and facilitate the market.   This report also looks beyond the US and touches on environmental concerns set to drive the EV market worldwide.   Want to find out more? This report demonstrates GlobalData Explorer’s sector analysis capabilities, showing how you can:  
  • Get historical and forecast market sizing data, with country specific insight for 22+ of the world’s largest industries
  • Track sector dealmaking activity, to view aggregate volumes, specific deals and top investors for all major deal types in M&A, Capital Raising, and Partnerships
  • Analyze news from GlobalData Explorer’s News Database – enable screening and alerts by industry, company, geography and news sentiment for filtered insight
  • Identify and track the key disruptive trends that are keeping the top digital thought leaders talking through social media analytics
  Consult this report now to find out how you and your company can benefit from our Explorer platform.
by GlobalData
Enter your details here to receive your free Report.

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