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High precision angular contact ball bearings

71914HVUJ84 - SNR

71914HVUJ84

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 diameter70 mm
D - External diameter100 mm
B - Bearing/Inner ring width16 mm
d1 - External diameter inner ring80,1 mm
D1 - Inner diameter outer ring89,9 mm
D2 - Inner diameter outer ring93,49 mm
a - Charge load application point28 mm
α - Contact angle25 °
rs - Min fillet radius1 mm
r1s - Min fillet radius0,3 mm
Precision classP4
Mass0,34 kg
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PRODUCT PERFORMANCE
C - Dynamic load22,4 kN
C0 - Static load23 kN
Cu - Fatigue limit load1,32 kN
f0 - Coefficient16.764
Axial displacement K Factor0.5
Preload level8
Preload value0,59 kN
Axial rigidity247 N/µm
Radial rigidity494 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed19000 tr/min
N lim - Grease lubrication limit speed12500 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)10,984 Hz
BPFI - Over rolling frequency on inner (60 rpm)13,016 Hz
BSF - Over rolling frequency on rolling element (60 rpm)10,631 Hz
BRF - Rotational frequency – rolling element (60 rpm)5,316 Hz
FTF - Rotational frequency - cage (60 rpm)0,458 Hz
ABUTMENT
da min - Min shoulder diameter IR75,5 mm
db min - Min IR shoulder diameter75,5 mm
Da max - Max shoulder diameter OR94,5 mm
Db max - Max OR shoulder diameter94,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius1 mm
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