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ML71903HVUJ84S - SNR

ML71903HVUJ84S

High precision angular contact ball bearing, high speed series ML, 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-SNR is getting under ranges dedicated to requirements of speed, sealing, specific greasing, etc.

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Technical datasheet

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PRODUCT DEFINITION
BrandSNR
d - Internal diameter17 mm
D - External diameter30 mm
B - Bearing/Inner ring width7 mm
d1 - External diameter inner ring21 mm
d2 - External diameter inner ring20,05 mm
D1 - Inner diameter outer ring26,65 mm
D2 - Inner diameter outer ring27,25 mm
a - Charge load application point9 mm
α - Contact angle25 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4S
Mass0,017 kg
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PRODUCT PERFORMANCE
C - Dynamic load2,05 kN
C0 - Static load1,02 kN
Cu - Fatigue limit load0,08 kN
f0 - Coefficient8.138
Axial displacement K Factor1.03
Preload level8
Preload value0,05 kN
Axial rigidity52 N/µm
Radial rigidity110 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
Nlim - Oil lubrication limit speed83000 tr/min
Nlim - Grease lubrication limit speed57000 tr/min
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)8,027 Hz
BPFI - Characteristic inner ring frequency (60 rpm)9,973 Hz
FTF - Characteristic cage frequency (60 rpm)0,446 Hz
BSF - Characteristic rolling element frequency (60 rpm)8,289 Hz
ABUTMENT
da min - Min shoulder diameter IR19,5 mm
db min - Min IR shoulder diameter19,5 mm
Da max - Max shoulder diameter OR27,5 mm
Db max - Max OR shoulder diameter27,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
Product classification image
Calcul factors image