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71908HVUJ74 - SNR

71908HVUJ74

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 40 mm
External diameter D 62 mm
Bearing/Inner ring width(B) 12 mm
External diameter inner ring d1 46,8 mm
Inner diameter outer ring D1 55,2 mm
Inner diameter outer ring D2 58,22 mm
Charge load application point a 18 mm
Contact angle α 25 °
Min fillet radius rs 0,6 mm
Min fillet radius r1s 0,3 mm
Coefficient f0 16.093
Precision class P4
Mass 0,11 kg
Brand SNR
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PRODUCT PERFORMANCE

Dynamic load, C 13,6 kN
Static load, C0 11,2 kN
Fatigue limit load, Cu 0,65 kN
Axial displacement K Factor 0.65
Preload level 7
Preload value 0,12 kN
Axial rigidity 110 N/µm
Radial rigidity 233 N/µm
Min operating temperature, Tmin -30 °C
Max operating temperature, Tmax 120 °C
Nlim (oil) 31000 tr/min
Nlim (grease) 21000 tr/min
Characteristic cage frequency, FTF 0,444 Hz
Characteristic rolling element frequency, BSF 7,929 Hz
Characteristic outer ring frequency, BPF0 8,428 Hz
Characteristic inner ring frequency, BPFI 10,572 Hz

ABUTMENT

Min shoulder diameter IR da min 44,5 mm
Min IR shoulder diameter (db min) 44,5 mm
Max shoulder diameter OR Da max 57,5 mm
Max OR shoulder diameter (Db max) 57,5 mm
Maxi fillet radius r1a 0,3 mm
Max shaft & housing fillet radius ra max 0,6 mm
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