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High precision angular contact ball bearings

7020CVUJ84 - SNR

7020CVUJ84

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 diameter100 mm
D - External diameter150 mm
B - Bearing/Inner ring width24 mm
d1 - External diameter inner ring115,8 mm
D1 - Inner diameter outer ring134,2 mm
D2 - Inner diameter outer ring141,51 mm
a - Charge load application point29 mm
α - Contact angle15 °
rs - Min fillet radius1,5 mm
r1s - Min fillet radius0,6 mm
Precision classP4
Mass1,25 kg
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PRODUCT PERFORMANCE
C - Dynamic load75,3 kN
C0 - Static load77,3 kN
Cu - Fatigue limit load3,7 kN
f0 - Coefficient16
Axial displacement K Factor0.91
Preload level8
Preload value1,19 kN
Axial rigidity192 N/µm
Radial rigidity954 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed14000 tr/min
N lim - Grease lubrication limit speed9200 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)9,718 Hz
BPFI - Over rolling frequency on inner (60 rpm)12,282 Hz
BSF - Over rolling frequency on rolling element (60 rpm)8,176 Hz
BRF - Rotational frequency – rolling element (60 rpm)4,088 Hz
FTF - Rotational frequency - cage (60 rpm)0,442 Hz
ABUTMENT
da min - Min shoulder diameter IR108,5 mm
db min - Min IR shoulder diameter108,5 mm
Da max - Max shoulder diameter OR141,5 mm
Db max - Max OR shoulder diameter141,5 mm
r1a - Max fillet radius0,6 mm
ra max - Max shaft & housing fillet radius1,5 mm
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