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High precision angular contact ball bearings

71900HVUJ84 - SNR

71900HVUJ84

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 diameter10 mm
D - External diameter22 mm
B - Bearing/Inner ring width6 mm
d1 - External diameter inner ring13,6 mm
D1 - Inner diameter outer ring17,8 mm
D2 - Inner diameter outer ring19,33 mm
a - Charge load application point7 mm
α - Contact angle25 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4
Mass0,01 kg
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PRODUCT PERFORMANCE
C - Dynamic load2,65 kN
C0 - Static load1,29 kN
Cu - Fatigue limit load0,08 kN
f0 - Coefficient12.864
Axial displacement K Factor1.23
Preload level8
Preload value0,07 kN
Axial rigidity49 N/µm
Radial rigidity98 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed100000 tr/min
N lim - Grease lubrication limit speed66000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)4,492 Hz
BPFI - Over rolling frequency on inner (60 rpm)6,508 Hz
BSF - Over rolling frequency on rolling element (60 rpm)4,779 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,39 Hz
FTF - Rotational frequency - cage (60 rpm)0,408 Hz
ABUTMENT
da min - Min shoulder diameter IR12,5 mm
db min - Min IR shoulder diameter12,5 mm
Da max - Max shoulder diameter OR19,5 mm
Db max - Max OR shoulder diameter19,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
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