New Product Info
dmn170x104 Sealed High-Speed Angular Contact Bearing “New BNS Type”(Mar 10,2017)
The limiting dmn value of the BNS type sealed high-speed
angular contact bearing is dmn 140×104
.
A new limiting speed of dmn 170×104 (the worlds highest speed
level) was enabled by optimized internal design and a new
grease. New grease improves the running-in operation for main
spindle bearings. It corresponds to the small machining center
and tapping machine by making it to the series up to the small
diameter size of φ20mm bore.
1. Introduction
Four years have already passed since the ULTAGE Series of products were presented at JIMTOF 2002.The main purpose for developing the ULTAGE Series
was to provide bearing products that can handle higher speeds and advanced functions in machine tool main spindles. The need for higher main spindle speeds has posed new challenges for bearings that support machine tool main spindles. That is, higher main spindle speeds have led to higher bearing speeds, and main spindle bearings must handle the increased heat generation that results from the adoption of built-in spindle motors capable of rapid acceleration and deceleration. Main spindle bearings must also accommodate shorter bearing lengths in order to help increase critical bearing speeds. Greater centrifugal force, higher ambient temperatures, and shorter bearing spans have led to increased internal bearing preloads, making operating conditions for main spindle bearings much more demanding. To address this problem, NTN has developed and marketed the ULTAGE Series of standard angular contact ball bearings (HSE type) that are capable of high-speed operation under high bearing stress conditions. The ULTAGE Series consists of 12 product types capable of meeting various customer needs for higher speeds and difficult environmental considerations. It includes an eco-friendly bearing product line and a sealed angular contact ball bearing product line. This report describes NTN’s product development efforts for the “New BNS Type” sealed angular contact ball bearing product, which is capable of the world’s highest dmn limiting speed, at 170 x 104, with a definite position preloading system. Based on the conventional BNS type, this product has been developed through optimization of the internal design, introduction of the new SE-1 grease and employment of a special carburized steel for the inner and outer rings.
2. Development of the "New BNS Type"Sealed Super High-Speed Angular Contact Ball Bearing Featuring the World’s Highest dmn of 170 x 104 2.1 Highlights of development For machine tool main spindle bearings, higher speed and greater stiffness are required to shorten machining time, while inhibition of excessive temperature increases and higher running accuracy are also needed to improve machining accuracy. Furthermore, reduction in the amount of lubricating oil and employment of grease lubrication are necessary
to ensure eco-friendliness. Among these requirements, the most outstanding market need is the adoption of a grease lubrication system because
of its friendliness to the environment and ease of
The limiting dmn value of the BNS type sealed high-speed
angular contact bearing is dmn 140×104
.
A new limiting speed of dmn 170×104 (the worlds highest speed
level) was enabled by optimized internal design and a new
grease. New grease improves the running-in operation for main
spindle bearings. It corresponds to the small machining center
and tapping machine by making it to the series up to the small
diameter size of φ20mm bore.
1. Introduction
Four years have already passed since the ULTAGE Series of products were presented at JIMTOF 2002.The main purpose for developing the ULTAGE Series
was to provide bearing products that can handle higher speeds and advanced functions in machine tool main spindles. The need for higher main spindle speeds has posed new challenges for bearings that support machine tool main spindles. That is, higher main spindle speeds have led to higher bearing speeds, and main spindle bearings must handle the increased heat generation that results from the adoption of built-in spindle motors capable of rapid acceleration and deceleration. Main spindle bearings must also accommodate shorter bearing lengths in order to help increase critical bearing speeds. Greater centrifugal force, higher ambient temperatures, and shorter bearing spans have led to increased internal bearing preloads, making operating conditions for main spindle bearings much more demanding. To address this problem, NTN has developed and marketed the ULTAGE Series of standard angular contact ball bearings (HSE type) that are capable of high-speed operation under high bearing stress conditions. The ULTAGE Series consists of 12 product types capable of meeting various customer needs for higher speeds and difficult environmental considerations. It includes an eco-friendly bearing product line and a sealed angular contact ball bearing product line. This report describes NTN’s product development efforts for the “New BNS Type” sealed angular contact ball bearing product, which is capable of the world’s highest dmn limiting speed, at 170 x 104, with a definite position preloading system. Based on the conventional BNS type, this product has been developed through optimization of the internal design, introduction of the new SE-1 grease and employment of a special carburized steel for the inner and outer rings.
2. Development of the "New BNS Type"Sealed Super High-Speed Angular Contact Ball Bearing Featuring the World’s Highest dmn of 170 x 104 2.1 Highlights of development For machine tool main spindle bearings, higher speed and greater stiffness are required to shorten machining time, while inhibition of excessive temperature increases and higher running accuracy are also needed to improve machining accuracy. Furthermore, reduction in the amount of lubricating oil and employment of grease lubrication are necessary
to ensure eco-friendliness. Among these requirements, the most outstanding market need is the adoption of a grease lubrication system because
of its friendliness to the environment and ease of
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