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71903HVUJ84 - SNR

71903HVUJ84

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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Specs

PRODUCT DIMENSIONS

Internal diameter d 17 mm
External diameter D 30 mm
Bearing/Inner ring width(B) 7 mm
External diameter inner ring d1 21 mm
Inner diameter outer ring D1 26,6 mm
Inner diameter outer ring D2 28,22 mm
Charge load application point a 9 mm
Contact angle α 25 °
Min fillet radius rs 0,3 mm
Min fillet radius r1s 0,3 mm
Coefficient f0 12.91
Precision class P4
Mass 0,017 kg
Brand SNR
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PRODUCT PERFORMANCE

Dynamic load, C 4,45 kN
Static load, C0 2,6 kN
Fatigue limit load, Cu 0,16 kN
Axial displacement K Factor 1.0
Preload level 8
Preload value 0,12 kN
Axial rigidity 73 N/µm
Radial rigidity 147 N/µm
Min operating temperature, Tmin -30 °C
Max operating temperature, Tmax 120 °C
Nlim (oil) 68000 tr/min
Nlim (grease) 45000 tr/min
Characteristic cage frequency, FTF 0,424 Hz
Characteristic rolling element frequency, BSF 5,859 Hz
Characteristic outer ring frequency, BPF0 5,942 Hz
Characteristic inner ring frequency, BPFI 8,058 Hz

ABUTMENT

Min shoulder diameter IR da min 19,5 mm
Min IR shoulder diameter (db min) 19,5 mm
Max shoulder diameter OR Da max 27,5 mm
Max OR shoulder diameter (Db max) 27,5 mm
Maxi fillet radius r1a 0,3 mm
Max shaft & housing fillet radius ra max 0,3 mm
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