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ML71909HVUJ74S - SNR

ML71909HVUJ74S

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 diameter45 mm
D - External diameter68 mm
B - Bearing/Inner ring width12 mm
d1 - External diameter inner ring52,3 mm
d2 - External diameter inner ring50,2 mm
D1 - Inner diameter outer ring61,51 mm
D2 - Inner diameter outer ring63,01 mm
a - Charge load application point19 mm
α - Contact angle25 °
rs - Min fillet radius0,6 mm
r1s - Min fillet radius0,3 mm
Precision classP4S
Mass0,128 kg
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PRODUCT PERFORMANCE
C - Dynamic load6,9 kN
C0 - Static load4,95 kN
Cu - Fatigue limit load0,32 kN
f0 - Coefficient8.584
Axial displacement K Factor0.64
Preload level7
Preload value0,06 kN
Axial rigidity86 N/µm
Radial rigidity192 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
Nlim - Oil lubrication limit speed35000 tr/min
Nlim - Grease lubrication limit speed24000 tr/min
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)12,905 Hz
BPFI - Characteristic inner ring frequency (60 rpm)15,095 Hz
FTF - Characteristic cage frequency (60 rpm)0,461 Hz
BSF - Characteristic rolling element frequency (60 rpm)11,521 Hz
ABUTMENT
da min - Min shoulder diameter IR49,5 mm
db min - Min IR shoulder diameter49,5 mm
Da max - Max shoulder diameter OR63,5 mm
Db max - Max OR shoulder diameter63,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,6 mm
Product classification image
Calcul factors image