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ML71904HVUJ74S - SNR

ML71904HVUJ74S

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 diameter20 mm
D - External diameter37 mm
B - Bearing/Inner ring width9 mm
d1 - External diameter inner ring25,1 mm
d2 - External diameter inner ring23,9 mm
D1 - Inner diameter outer ring32,15 mm
D2 - Inner diameter outer ring33,45 mm
a - Charge load application point11 mm
α - Contact angle25 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,3 mm
Precision classP4S
Mass0,036 kg
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PRODUCT PERFORMANCE
C - Dynamic load3,7 kN
C0 - Static load1,82 kN
Cu - Fatigue limit load0,11 kN
f0 - Coefficient7.964
Axial displacement K Factor0.99
Preload level7
Preload value0,03 kN
Axial rigidity44 N/µm
Radial rigidity98 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
Nlim - Oil lubrication limit speed68000 tr/min
Nlim - Grease lubrication limit speed47000 tr/min
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)6,969 Hz
BPFI - Characteristic inner ring frequency (60 rpm)9,031 Hz
FTF - Characteristic cage frequency (60 rpm)0,436 Hz
BSF - Characteristic rolling element frequency (60 rpm)6,913 Hz
ABUTMENT
da min - Min shoulder diameter IR22,5 mm
db min - Min IR shoulder diameter22,5 mm
Da max - Max shoulder diameter OR34,5 mm
Db max - Max OR shoulder diameter34,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,3 mm
Product classification image
Calcul factors image