Bearing BK4520
                
                
                    Inner diameter:: 45 mm
Outer diameter: 52 mm
The size of the width: 20 mm
Weight:: 0.056 kg
                    
            Outer diameter: 52 mm
The size of the width: 20 mm
Weight:: 0.056 kg
Technical specifications
Designation: BK4520
Producer: INA
Technical data from the manufacturers catalog :
Inner diameter: 45 mm
External diameter: 52 mm
Width: 20 mm
Weight: 0.056 kg
B 91 2362 Le/ 2300 Li 
                                    Manufacturer: ContiTech AG 
                                
                            Подшипник 7009CDF 
                                    Manufacturer: NACHI 
                                
                                  Sizes: 45x75x16 (mm)
                                
                                
                                   Weight:: 0.265 (kg)
                                
                            
                            SALNIK REINFORCED (TC) 
                                    Manufacturer: NQK SF 
                                
                                  Sizes: 40x65x7 (mm)
                                
                                
                            SEALS (REINFORCED SEAL) (D) 
                                    Manufacturer: FEKO 
                                
                                  Sizes: 8x35x16.50 (mm)
                                
                                
                            ПОДШИПНИК ШАРИКОВЫЙ РАДИАЛЬНО-УПОРНЫЙ 7311-B-JP 
                                    Manufacturer: FAG 
                                
                                  Sizes: 55x120x29 (mm)
                                
                                
                            Krestovina 18x48  
                                    Manufacturer: TOYO 
                                
                            Bearing HK1612 
                                    Manufacturer: ETERNO 
                                
                                  Sizes: 16x22x12 (mm)
                                
                                
                                   Weight:: 0.012 (kg)
                                
                            
                            MXL 82,4 MEGADYNE MEGAPOWER 
                                    Manufacturer: ContiTech AG 
                                
                            O-RING 
                                    Manufacturer: NQK SF 
                                
                                  Sizes: 61.90x73.30x5.70 (mm)
                                
                                
                            MXL 70,4 MEGADYNE MEGAPOWER 
                                    Manufacturer: ContiTech AG 
                                
                            
                INSTALLING BEARINGS 
                    
                       Approximately 16% of all early pill accidents are caused by faulty mounting (generally excessive force) and lack of proper tools.
                    
                
                DROPPING BEARINGS 
                    
                        The need for dismantling (removal) of the bearing can be caused by several reasons: failure of the bearings, disassembly of other parts of the mechanism, and so on.
                    
                
                SELECTION OF FUEL OILS
                    
                       The use of grease to lubricate the bearings ensures smooth operation and maximum reliability of bearings, even in extreme conditions.