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ML71909CVUJ74S - SNR

ML71909CVUJ74S

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 point14 mm
α - Contact angle17 °
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 load7,3 kN
C0 - Static load5,2 kN
Cu - Fatigue limit load0,32 kN
f0 - Coefficient8.531
Axial displacement K Factor1.15
Preload level7
Preload value0,035 kN
Axial rigidity40 N/µm
Radial rigidity201 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
Nlim - Oil lubrication limit speed39000 tr/min
Nlim - Grease lubrication limit speed28000 tr/min
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)12,845 Hz
BPFI - Characteristic inner ring frequency (60 rpm)15,155 Hz
FTF - Characteristic cage frequency (60 rpm)0,459 Hz
BSF - Characteristic rolling element frequency (60 rpm)11,513 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