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High precision angular contact ball bearings

7201HG1UJ74 - SNR

7201HG1UJ74

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 diameter32 mm
B - Bearing/Inner ring width10 mm
d1 - External diameter inner ring18,31 mm
D1 - Inner diameter outer ring26,02 mm
D2 - Inner diameter outer ring28,55 mm
a - Charge load application point10 mm
α - Contact angle25 °
rs - Min fillet radius0,6 mm
r1s - Min fillet radius0,6 mm
Precision classP4
Mass0,037 kg
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PRODUCT PERFORMANCE
C - Dynamic load8 kN
C0 - Static load4 kN
Cu - Fatigue limit load0,23 kN
f0 - Coefficient12.513
Axial displacement K Factor1.03
Preload level7
Preload value0,07 kN
Axial rigidity56 N/µm
Radial rigidity120 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed66000 tr/min
N lim - Grease lubrication limit speed43000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)3,774 Hz
BPFI - Over rolling frequency on inner (60 rpm)6,226 Hz
BSF - Over rolling frequency on rolling element (60 rpm)3,473 Hz
BRF - Rotational frequency – rolling element (60 rpm)1,737 Hz
FTF - Rotational frequency - cage (60 rpm)0,377 Hz
ABUTMENT
da min - Min shoulder diameter IR16,5 mm
db min - Min IR shoulder diameter16,5 mm
Da max - Max shoulder diameter OR27,5 mm
Db max - Max OR shoulder diameter27,5 mm
r1a - Max fillet radius0,6 mm
ra max - Max shaft & housing fillet radius0,6 mm
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