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High precision angular contact ball bearings

7200HG1UJ84 - SNR

7200HG1UJ84

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 diameter30 mm
B - Bearing/Inner ring width9 mm
d1 - External diameter inner ring16 mm
D1 - Inner diameter outer ring24,45 mm
D2 - Inner diameter outer ring26,09 mm
a - Charge load application point9 mm
α - Contact angle25 °
rs - Min fillet radius0,6 mm
r1s - Min fillet radius0,6 mm
Precision classP4
Mass0,03 kg
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PRODUCT PERFORMANCE
C - Dynamic load7,2 kN
C0 - Static load3,55 kN
Cu - Fatigue limit load0,21 kN
f0 - Coefficient12.745
Axial displacement K Factor1.05
Preload level8
Preload value0,18 kN
Axial rigidity81 N/µm
Radial rigidity158 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed73000 tr/min
N lim - Grease lubrication limit speed48000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)3,743 Hz
BPFI - Over rolling frequency on inner (60 rpm)6,257 Hz
BSF - Over rolling frequency on rolling element (60 rpm)3,377 Hz
BRF - Rotational frequency – rolling element (60 rpm)1,689 Hz
FTF - Rotational frequency - cage (60 rpm)0,374 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 radius0,6 mm
ra max - Max shaft & housing fillet radius0,6 mm
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