NKE electrically insulated rolling bearings
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INCREASE RELIABLITY WITH NKE PRODUCTS SQ77 – electrically insulated bearings SQ1 – bearings for railway applications Shaping the future of motion technolog

Fersa Group EXPERTS IN BEARING SOLUTIONS NKE AUSTRIA GmbH is a premium bearing manufacturer with headquarters in Steyr, Austria. The company was founded in 1996 by a group of senior staff members of the former Steyr Wälzlager. NKE manufactures both standard and special bearings for all industrial applications. Our core competences - engineering, product development, final processing of components, assembly, quality assurance, logistics, sales and marketing - are centralised in Steyr. The site is accredited with ISO 9001:2015 (design, development, manufacturing and distribution of bearings),...

AUSTRIAN QUALITY COMBINED WITH ADVANCED TECHNOLOGY Our figures Fersa Group is constantly growing 20% of sales based on the development of new part numbers. Austria Steyr • Tyumen • Moscow Sales 2022 Fersa Group (20% green revenues) • Shanghai • Shenyang • Jiaxing x5,1 Sales in the last 6 years 4,5% R+D investment Total sales 25% Investment in the Internet of Things Total CAPEX +3000 New part numbers per year Turkey Productive center Singapur Pioneer India • Mumbai • Surendranagar • Rajkot • Pune Australia Melbourne Technology Center Logistics Center

THE PERFECT SOLUTION FOR INDUSTRIAL APPLICATIONS Bearing damage by the passage of electrical current Under adverse conditions the rolling bearings used in electrical machines can sustain damage through current discharge. The electrical current passing through the bearing may be caused by / incorrect or faulty wiring / faulty or damaged earth connections resulting in insufficient potential equalisation / unshielded and/or asymmetric wiring in electric motors / asymmetrical magnetic flux / fast acting frequency converters NKE electrically insulated bearings – efficient and effective NKE...

AUSTRIAN QUALITY COMBINED WITH ADVANCED TECHNOLOGY Advantages: QMS Testing Results / Other Testing Results: / SQ77 is a simple and cost effective protection against bearing damage caused by the passage of currents. / 100% of SQ77 bearing is checked with respect to the dielectric strength of its insulation layer. / Insulation eliminates the risk of damaged raceways and lubricant premature aging, what is critical for the correct function of the bearing. / Remaining dimensional and metallurgical inspections follow the NKE quality standards. / 3.1. inspection certificate (DIN EN 10204) upon...

THE PERFECT SOLUTION FOR INDUSTRIAL APPLICATIONS NKE HYBRID Bearings: Advantages and benefits / Higher rigidity: less deformation in rolling contact areas / Insulation: highest protection against passage of electric currents / Reduced risk of poor lubrication at high speeds and fast accelerations, or in the case of insufficient lubricatingfilm / Higher speed suitability: centrifugal force reduction due to the light rolling elements / Low running noise operational bearings / Lightweight: Silicon nitride is 60% lighter than conventional rolling element steel / Significantly less susceptible...

AUSTRIAN QUALITY COMBINED WITH ADVANCED TECHNOLOGY NKE manufactures bearings with ceramic rolling elements Technologies are advancing rapidly and bearings have to meet more sophisticated and varied requirements under increasingly demanding operating conditions. In response to these special requirements, NKE Austria and FERSA have committed themselves to the development and manufacturing hybrid bearings. NKE hybrid bearings are especially suitable for applications required to operate with low noise. Clean bearing steel long bearing service life Hybrid bearings can be used in new applications...

THE PERFECT SOLUTION FOR INDUSTRIAL APPLICATIONS Traction motor bearings SQ1 Over the years, NKE AUSTRIA has successfully gained approval from numerous renowned companies in the railway industries, including railway operators, service companies and OEM manufacturers. Traction motor bearings must demonstrate long service life. The most frequently used bearing types are: / Cylindrical roller bearings / Deep groove ball bearings / Electrically insulated bearings (coated outer ring or inner ring, hybrid) Designed to ensure reliability in the application / According to DIN 43283 (NKE SQ1 is...

AUSTRIAN QUALITY COMBINED WITH ADVANCED TECHNOLOGY Popular NKE insulated deep groove ball bearings: Bearing designation

THE PERFECT SOLUTION FOR INDUSTRIAL APPLICATIONS Popular NKE insulated deep groove ball bearings: Bearing designation Popular NKE insulated cylindrical roller bearings: Bearing designation

AUSTRIAN QUALITY COMBINED WITH ADVANCED TECHNOLOGY Bearing designation

THE PERFECT SOLUTION FOR INDUSTRIAL APPLICATIONS Popular NKE insulated cylindrical roller ball bearings: Bearing designation Popular NKE hybrid bearings: Bearing designation Other bearing types and special bearing types upon demand. Please contact our sales team.

AUSTRIAN QUALITY COMBINED WITH ADVANCED TECHNOLOGY Typical cage designs for CRBs in railway applications or in the electrical drives industry: MPA Outer ring guided solid brass cage, designed as a window one piece type. Prefered if bearings is lubricated with oil M6 Roller guided solid brass cage for cylindrical roller bearings, cage body designed with trapezoid - shaped machined rivets. Prefered if bearings is lubricated with grease Typical cage designs for insulated (SQ77) or hybrid DGBs Cage design: M solid brass cage, two piece, ball guided, revited with steel rivets MR improved running...

THE PERFECT SOLUTION FOR INDUSTRIAL APPLICATIONS #1 Case study: SQ77 bearings in an electric motor with frequency inverter Application: Electric motor with frequency converter Challenge: Undoubtedly, the risk that the bearing fail due to electrical corosion increases significantly where the application uses a frequency converter. Solution: Replace conventional bearing by NKE electric insulated bearings (SQ77). Benefits: NKE insulated SQ77 bearings are designed to prevent electric current to passing through the bearing. Furthermore the SQ77 bearing is fully interchangeable with conventional...