HIGH-PRECISION ANGULARCONTACT BALL BEARINGS ROBUSTSHOT SERIES
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HIGH-PRECISION ANGULARCONTACT BALL BEARINGS ROBUSTSHOT SERIES

As one of the world’s leading manufacturers of rolling bearings, linear technology components and steering systems, we can be found on almost every continent – with production facilities, sales offices and technology centres – because our customers appreciate short decision-making channels, prompt deliveries and local service. Asia The Americas Oceania Africa The NSK company NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services...

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Picture Courtesy: Franz Kessler GmbH, Germany High-precision angular-contact ball bearings

The requirements for the main spindles on modern machine tools continue to increase. For this reason, growing demands are also being made of the spindle bearings. A reliable, continuous supply of lubrication to the working surfaces of the bearing is a particular challenge; without this lubrication, bearing operation would be impossible. The newly developed NSK angular-contact ball bearings in the ROBUSTSHOT series meet all of these requirements. Conventional oil-air lubrication methods attempt to inject the lubricant into the bearing from the side using a nozzle. The problem here, however,...

High-precision angular-contact ball bearings Nomenclature for angular-contact bearings with oil-air lubrication (ROBUSTSHOT series) Nomenclature system Example: Nominal bore diameter Y3 O-rings Degree of accuracy Bearing design Preload Series option Bearing arrangement Material ROBUSTSHOT design Cage

Application example Nominal bore diameter Bearing design Series option ROBUSTSHOT design seal BNR: Contact angle 18° BER: Contact angle 25° 10 = ISO series 10, 19 = ISO series 19 Rings: Bearing steel (SUJ2) Rolling elements: Ceramic (Si3N4) T: Phenolic cage guided by the outer ring Max. operating temperature 120 °C E34D: Lubrication groove with 2 oil through-holes and 2 grooves on the outer ring for the O-ring SU: Universal design (single row) DU: Universal design (double row) DB: Back to back arrangemet (O-arrangement) DF: Face to face (X-arrangement) DT: Tandem arrangement DBD, DFD, DTD,...

High-precision angular-contact ball bearings Size option 19 Main dimensions Code d

a Load rating (kN) Code Cr (dyn.) Permissible axial load (kN) Effective load centre (mm) a HIGH-PRECISION ANGULAR-CONTACT BALL BEARINGS ROBUSTSHOT SERIES 9

High-precision angular-contact ball bearings Size option 10 Main dimensions Code d

a Load rating (kN) Code Cr (dyn.) Permissible axial load (kN) Effective load centre (mm) a HIGH-PRECISION ANGULAR-CONTACT BALL BEARINGS ROBUSTSHOT SERIES 11

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