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7020HVUJ74 - SNR

7020HVUJ74

High precision angular contact ball bearing, laminated resin cage centred on outer ring

In the ball bearing and high precision bearing ranges, the high precision angular contact ball bearing solves the maximum reliability constraints with increased performance in terms of rigidity, speed, capacity and precision. This bearing is recommended for demanding applications in terms of precision such as machine tool spindles. NTN-SNR is getting under ranges dedicated to requirements of speed, sealing, specific greasing, etc.

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Technical datasheet

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Specs

PRODUCT DIMENSIONS

Internal diameter (d) 100 mm
External diameter (D) 150 mm
Bearing/Inner ring width (B) 24 mm
External diameter inner ring d1 115,8 mm
Inner diameter outer ring (D1) 134,2 mm
Inner diameter outer ring D2 141,51 mm
Charge load application point a 41 mm
Contact angle α 25 °
Min fillet radius (rs) 1,5 mm
Min fillet radius r1s 0,6 mm
Coefficient f0 16.177
Precision class P4
Mass 1,27 kg
Brand SNR
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PRODUCT PERFORMANCE

Dynamic load (C) 71,2 kN
Static load (C0) 73,4 kN
Fatigue limit load (Cu) 3,7 kN
Axial displacement K Factor 0.43
Preload level 7
Preload value 630000 kN
Axial rigidity 281 N/µm
Radial rigidity 602 N/µm
Min operating temperature (Tmin) -30 °C
Max operating temperature (Tmax) 120 °C
Nlim (oil) 13000 tr/min
Nlim (grease) 8400 tr/min
Characteristic cage frequency, FTF 0,445 Hz
Characteristic rolling element frequency, BSF 8,189 Hz
Characteristic outer ring frequency, BPF0 9,797 Hz
Characteristic inner ring frequency, BPFI 12,203 Hz

ABUTMENT

Min shoulder diameter IR (da min) 108,5 mm
Min IR shoulder diameter (db min) 108,5 mm
Max shoulder diameter OR (Da max) 141,5 mm
Max OR shoulder diameter (Db max) 141,5 mm
Maxi fillet radius r1a 0,6 mm
Max shaft & housing fillet radius (ra max) 1,5 mm
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