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High precision angular contact ball bearings

CH7001CVUJ74 - SNR

CH7001CVUJ74

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 diameter12 mm
D - External diameter28 mm
B - Bearing/Inner ring width8 mm
d1 - External diameter inner ring16,65 mm
D1 - Inner diameter outer ring23,4 mm
D2 - Inner diameter outer ring25,22 mm
a - Charge load application point7 mm
α - Contact angle15 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4
Mass0,02 kg
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PRODUCT PERFORMANCE
C - Dynamic load5,9 kN
C0 - Static load3 kN
Cu - Fatigue limit load0,18 kN
f0 - Coefficient12.507
Axial displacement K Factor2.04
Preload level7
Preload value0,03 kN
Axial rigidity22 N/µm
Radial rigidity128 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed110000 tr/min
N lim - Grease lubrication limit speed73000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)4,235 Hz
BPFI - Over rolling frequency on inner (60 rpm)6,765 Hz
BSF - Over rolling frequency on rolling element (60 rpm)3,978 Hz
BRF - Rotational frequency – rolling element (60 rpm)1,989 Hz
FTF - Rotational frequency - cage (60 rpm)0,385 Hz
ABUTMENT
da min - Min shoulder diameter IR14,5 mm
db min - Min IR shoulder diameter14,5 mm
Da max - Max shoulder diameter OR25,5 mm
Db max - Max OR shoulder diameter25,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
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