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High precision angular contact ball bearings

7000CVUJ74 - SNR

7000CVUJ74

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 diameter26 mm
B - Bearing/Inner ring width8 mm
d1 - External diameter inner ring14,65 mm
D1 - Inner diameter outer ring21,4 mm
D2 - Inner diameter outer ring23,22 mm
a - Charge load application point6 mm
α - Contact angle15 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4
Mass0,018 kg
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PRODUCT PERFORMANCE
C - Dynamic load5,5 kN
C0 - Static load2,6 kN
Cu - Fatigue limit load0,16 kN
f0 - Coefficient11.945
Axial displacement K Factor2.48
Preload level7
Preload value0,025 kN
Axial rigidity18 N/µm
Radial rigidity102 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed97000 tr/min
N lim - Grease lubrication limit speed64000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)3,722 Hz
BPFI - Over rolling frequency on inner (60 rpm)6,278 Hz
BSF - Over rolling frequency on rolling element (60 rpm)3,533 Hz
BRF - Rotational frequency – rolling element (60 rpm)1,767 Hz
FTF - Rotational frequency - cage (60 rpm)0,372 Hz
ABUTMENT
da min - Min shoulder diameter IR12,5 mm
db min - Min IR shoulder diameter12,5 mm
Da max - Max shoulder diameter OR23,5 mm
Db max - Max OR shoulder diameter23,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
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