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High precision angular contact ball bearings

7002CVUJ74 - SNR

7002CVUJ74

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 diameter15 mm
D - External diameter32 mm
B - Bearing/Inner ring width9 mm
d1 - External diameter inner ring20,15 mm
D1 - Inner diameter outer ring26,9 mm
D2 - Inner diameter outer ring28,84 mm
a - Charge load application point8 mm
α - Contact angle15 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4
Mass0,028 kg
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PRODUCT PERFORMANCE
C - Dynamic load6,6 kN
C0 - Static load3,8 kN
Cu - Fatigue limit load0,21 kN
f0 - Coefficient13.28
Axial displacement K Factor2.08
Preload level7
Preload value0,032 kN
Axial rigidity23 N/µm
Radial rigidity133 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed74000 tr/min
N lim - Grease lubrication limit speed49000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)5,228 Hz
BPFI - Over rolling frequency on inner (60 rpm)7,772 Hz
BSF - Over rolling frequency on rolling element (60 rpm)4,746 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,373 Hz
FTF - Rotational frequency - cage (60 rpm)0,402 Hz
ABUTMENT
da min - Min shoulder diameter IR17,5 mm
db min - Min IR shoulder diameter17,5 mm
Da max - Max shoulder diameter OR29,5 mm
Db max - Max OR shoulder diameter29,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
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