NTN Development of “Angular Contact Ball Bearing for High-Speed and Heavy-Cutting Machine Tools”

Development of ULTAGE Series*1 for both high-speed rotational performance and load resistance

NTN Corporation (hereafter, NTN) has developed the “Angular Contact Ball Bearing for High-Speed and Heavy-Cutting Machine Tools” with a high-speed rotational performance of dmn value*21.6 million as well as approximately 1.3 times the load capacity and allowable axial load compared to NTN's conventional products. This enables a single machine tool to cover the rough machining work and finishing processes that previously required numerous machine tools, and also helps to further increase productivity of machining centers, turning machines and multi-function machines.

Demand is growing in recent years for machine tools capable of a range of machining work in a single unit, from heavy-duty cutting at low to medium speeds that requires load resistance as well as finishing work at high rotating speeds. Heavy-duty cutting machine tools need high-speed rotational performance that exceeds the current dmn value of 1.2 million to be capable of finishing work, whereas a high load resistance is required for finishing work machine tools to allow heavy-duty cutting. This has led to a greater need for bearings for spindles with an increased level of both high-speed rotational performance and load resistance, which have a trade-off relationship.

The newly developed “Angular Contact Ball Bearing for High-Speed and Heavy-Cutting Machine Tools” features optimized internal bearing design such as a larger ball diameter and increased retainer strength to achieve a high-speed rotational performance dmn value of 1.6 million, as well as approximately 1.3 times higher load capacity and allowable axial load compared to conventional products. This allows the bearings to be used under the tough condition of greater high-speed rotation and high load combination to help increase machine tool productivity, and also achieve a stronger spindle capable of withstanding impacts with tools and machined pieces.

NTN will exhibit the developed product at “The 29th Japan International Machine Tool Fair (JIMTOF2018)” to be held at Tokyo Big Sight from November 1 to 6, and will propose it to various machine tool manufacturers and spindle manufacturers.

About BHR Bearing ( Shenzhen Qinggong Bearing Co, Ltd.)

Shenzhen Qinggong Bearing Co., Ltd. （www.bhrbearing.cn）is a well-know bearing manufacturer in China since the year 1996 with its own factory. Despite our own BHR bearings, we also distribute kinds of famous branded bearings from worldwide manufacturers SKF, FAG, NSK, KOYO, NTN, NACHI, ASAHI, TOYOTA......and OEM can also be supplied.

We Shenzhen Qinggong Bearing Co., Ltd. is focused and committed to deliver our customers high quality products and solutions because they are at the core of everything we do. By combining technology with our design engineering expertise we are able to offer a breadth of advanced bearings and solutions. With variety of bearings, competitive prices, fast delivery and good after-sale service, hope we will get a chance to talk bearings together.