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  • NSK Bearings Group launches main rotor bearings for wind turbines
    NSK Bearings Group launches main rotor bearings for wind turbines
    2018-02-12

    Building on its decades-long experience as one of the world’s principal suppliers of rolling bearings for drives found on wind turbines, NSK has now introduced large spherical roller bearings for use on the main rotor. Calling upon the company’s extensive experience of the demands that are placed on rolling bearings in wind energy applications, NSK engineers have developed a variety of different designs that are optimally matched to the attributes required of main rotor bearings. For instance, elevated levels of mechanical stress are prevalent as the rotor is exposed to very high wind loads. Although rotational speeds are relatively low at 5 to 20 rpm, the main rotor bearing has to be capable of withstanding both radial and axial loads, including the resulting bending movement of the rotor shaft. NSKHPS high performance spherical roller bearings featuring a high load factor have been developed specifically for applications of this type, and are manufactured and heat treated in accordance with NSK’s internal Wind Standard U 303. The breadth of the new range means that a selection of different designs are available. For example, a set of two spherical roller bearings is often used in systems up to 3 MW, while smaller systems frequently deploy a three-point bearing with a single spherical roller bearing (the attached gear is used as the bearing substitute in this configuration). In large systems, some OEMs opt for a combination of double-row tapered roller bearings and cylindrical roller bearings as fixed and floating bearings. This type of rotor assembly can also benefit from NSK rolling bearings manufactured to the company‘s Wind Standard U 303, with two tapered roller bearings configured typically in a face-to-face arrangement. Whichever solution is selected, all of the main rotor bearings developed by NSK are tested rigorously and conform to the highest quality requirements.

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  •  Tapered roller bearings Designation system
    Tapered roller bearings Designation system
    2018-01-23

    Prefixes: E2.      SKF Energy Efficient bearing J           Metric bearing following the ABMA designation system (ANSI/ABMA Standard 19.2) T          Metric bearing in accordance with ISO 355 Internal design: B         Steep contact angle Group 2: External design (seals, snap ring groove etc.) R      Flanged outer ring T       A number immediately following the T identifies the total width of matched bearings, arranged back-to-back or in tandem. X       Boundary dimensions changed to conform to ISO Group 3: Cage design J        Stamped steel cage, roller centred. A number following the J indicates a different cage design. TN9     Glass fibre reinforced PA66 cage, roller centred TNH     Glass fibre reinforced PEEK cage, roller centred Group 4.1: Materials, heat treatment HA1     Case-hardened inner and outer rings HA3     Case-hardened inner ring HN1    Inner and outer rings with special surface heat treatment HN3     Inner ring with special surface heat treatment Group 4.6:  Other variants CL7A      Pinion bearing, superseded by CL7C CL7C     High-performance design CLN      Reduced tolerances for ring widths and total (abutment) width in accordance with ISO tolerance class 6X PEX     SKF Explorer bearing on customer request Q      Optimized contact geometry and surface finish V001     CL7C and /2 VA321      Optimized internal design VA606      Crowned raceway on the outer ring, logarithmic profile on the inner ring and special heat treatment VA607     Same as VA606, but other outside diameter tolerance VC027     Modified internal geometry for increased permissible misalignment VC068     Increased running accuracy and special heat treatment VQ051     Modified internal geometry for increased permissible misalignment VQ267    Reduced inner ring width tolerance to ± 0,025 mm VQ495     CL7C with reduced or shifted tolerance range for the outside diameter VQ506     Reduced inner ring width tolerance VQ507     CL7C with reduced or shifted tolerance range for the outside diameter VQ523     CL7C with reduced inner ring width tolerance and reduced or shifted tolerance range for the outside diameter VQ601    Accuracy to ABMA tolerance class 0 for inch bearings VB022    Chamfer dime...

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  • NSK developed New product spintop
    NSK developed New product spintop
    2018-01-26

    NSK Micro Precision Co., Ltd., has developed a unique spinning top that incorporates several super smooth precision bearings. The top can stay upright and spin for about 8 minutes even on rough surfaces (weighted ring model). The top is on sale. In Japan, koma-asobi (top spinning) is a traditional game that has been enjoyed for over four centuries. Children often play with tops during the New Year's holiday, and some claim they bring good luck. The shape of the traditional spinning top has evolved over the years, but the core physical principles of play have not. With a playful spirit, and dedication to excellence, NSK Micro Precision endeavored to further evolve the spinning top, ultimately arriving at a completely game-changing design. The new top features the high precision bearings favored by Yo-yo world champions, and the central shaft doesn't rotate. This allows the top to spin for about 8 minutes on most surfaces, far longer than your average top (typically 2-3 minutes on unsmooth surfaces). This new toy follows NSK Micro Precision's hit fidget spinner, the Saturn Spinner, which sold out on the first day. The company hopes that these toys will spark the interest of children and adults alike in the mysteries of science and technology.

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  • Single row tapered roller bearings
    Single row tapered roller bearings
    2018-01-23

    Single row tapered roller bearings are the most basic and widely used, consisting of a cone assembly and a cup.  Linqing Kainuo Bearing Co.,Ltd  was established in 1992 and  offers the world's  variety in inch and metric sizes taper roller bearings. Tapered roller bearings (TRB) used rolling elements that are shaped like a cone, and are constructed so that all tapered surfaces converge at a common apex point on the bearing centerline to produce true rolling motion . Tapered roller bearings are generally used in lower speed, high load applications and are capable of absorbing radial  or axial loads. The internal angles may be designed to tailor the bearing to the loading demands of a specific application. Tapered roller bearings are a separable two-piece design (cup and cone) ; which, allows the end-use to optimize the internal clearance (and life) for each application when the bearing is mounted. Linqing Kainuo Bearing Co.,Ltd primarily manufactures  Metric size and inch size taper roller bearings,. Our Bearings Features: High quality  by hardened bearing steel Optimized, engineered internal geometry Highly consistent, reliable, and flexible manufacturing Globally interchangeable inch and metric designs

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