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Text version of the page
| TABLE OF CONTENTS INTRODUCTION The SNFA Group..............................................................................................................................................................................page 1 The Technologies............................................................................................................................................................................page 2 SNFA Precision Ball Bearings for Machine Tools and similar Applications..............................page 9 The Product ........................................................................................................................................................................................page 10 The Quality System ......................................................................................................................................................................page 11 The Product Range ......................................................................................................................................................................page 12 Symbols and Units ............................................................................................................................................page 13 PRODUCT DESCRIPTION Bearing Configuration ............................................................................................................................................................page 14 Materials..................................................................................................................................................................................................page 15 Precision (Tables ABEC 5 - ABEC 7 - ABEC 9)........................................................................................................page 16 Contact Angle....................................................................................................................................................................................page 17 Limiting Speed ................................................................................................................................................................................page 18 Bearing Operating Temperature ....................................................................................................................................page 19 Vibration and Noise....................................................................................................................................................................page 20 BEARING CALCULATION Calculation of Theoretical Life "L10"; "C33" Dynamic Load Coefficient....................................page 21 Bearing Static Check; "Co" Static Load Coefficient........................................................................................page 26 MATCHED SETS Matching (DUPLEX, MULTIPLEX, Sets) ......................................................................................................................page 28 Features of SNFA Sets................................................................................................................................................................page 30 Single Universal Bearings "U" ..........................................................................................................................................page 31 Preload ....................................................................................................................................................................................................page 32 Limiting Axial Load......................................................................................................................................................................page 33 Rigidity ....................................................................................................................................................................................................page 34 Spacers ....................................................................................................................................................................................................page 35 ASSEMBLY TOLERANCE Machining Tolerance for Shaft and Housings....................................................................................................page 36 Diameters of Shoulders and Corner Radii of Seatings................................................................................page 39 Diameters of Shoulders and Corner Radii of Bearings................................................................................page 41 | ||||