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Spherical roller bearing, one-piece machined cage, groove and lubrication holes on outer ring
The spherical roller bearing withstands significant loads and misalignments . This type of roller bearing is well adapted to harsh operating conditions : impacts or vibrations (crushers, vibrating screens, heavy handling, etc.). With the ULTAGE design, NTN offers as standard, unsurpassed endurance and longevity.
Log in To add this product to your basket Documentation Product information PRODUCT DEFINITION Brand SNR d - Internal diameter 280 mm D - External diameter 420 mm B - Bearing/Inner ring width 106 mm D1 - Inner diameter outer ring 385,2 mm rs - Min fillet radius 4 mm Number of lubrication holes 8 b - Groove width 18,32 mm k - Hole diameter 8 mm Radial clearance class C4 Mass 51,2 kg
PRODUCT PERFORMANCE C - Dynamic load 2170 kN C0 - Static load 3150 kN Cu - Fatigue limit load 263 kN e - Coefficient 0.22 Y0 - Static axial load coefficient 3 Y1 - Lower axial load coefficient 3.07 Y2 - Upper axial load coefficient 4.58 N ref - Reference thermal speed 1200 tr/min N lim - Mechanical Limit Speed 1700 tr/min Tmin - Min operating temperature -40 °C Tmax - Max operating temperature 200 °C
BEARING FREQUENCIES BPFO - Over rolling frequency on outer ring (60 rpm) 11,121 Hz BPFI - Over rolling frequency on inner (60 rpm) 13,879 Hz BSF - Over rolling frequency on rolling element (60 rpm) 8,861 Hz BRF - Rotational frequency – rolling element (60 rpm) 4,431 Hz FTF - Rotational frequency - cage (60 rpm) 0,445 Hz
ABUTMENT da max - Max shoulder diameter IR 0 mm da min - Min shoulder diameter IR 294,6 mm Da max - Max shoulder diameter OR 405,4 mm ra max - Max shaft & housing fillet radius 3 mm
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