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High precision angular contact ball bearings

71901HVUJ94 - SNR

71901HVUJ94

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 is getting sub-ranges dedicated to requirements of speed, sealing, specific greasing, etc.

Documentation

Product information

PRODUCT DEFINITION
BrandSNR
d - Internal diameter12 mm
D - External diameter24 mm
B - Bearing/Inner ring width6 mm
d1 - External diameter inner ring15,4 mm
D1 - Inner diameter outer ring19,6 mm
D2 - Inner diameter outer ring21,13 mm
a - Charge load application point7 mm
α - Contact angle25 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4
Mass0,011 kg
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PRODUCT PERFORMANCE
C - Dynamic load2,95 kN
C0 - Static load1,58 kN
Cu - Fatigue limit load0,09 kN
f0 - Coefficient13.261
Axial displacement K Factor1.1
Preload level9
Preload value0,15 kN
Axial rigidity74 N/µm
Radial rigidity139 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed89000 tr/min
N lim - Grease lubrication limit speed58000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)5,431 Hz
BPFI - Over rolling frequency on inner (60 rpm)7,569 Hz
BSF - Over rolling frequency on rolling element (60 rpm)5,363 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,682 Hz
FTF - Rotational frequency - cage (60 rpm)0,418 Hz
ABUTMENT
da min - Min shoulder diameter IR14,5 mm
db min - Min IR shoulder diameter14,5 mm
Da max - Max shoulder diameter OR21,5 mm
Db max - Max OR shoulder diameter21,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
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