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ML71912HVUJ74S - SNR

ML71912HVUJ74S

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 diameter60 mm
D - External diameter85 mm
B - Bearing/Inner ring width13 mm
d1 - External diameter inner ring68,1 mm
d2 - External diameter inner ring66,15 mm
D1 - Inner diameter outer ring78,71 mm
D2 - Inner diameter outer ring80,31 mm
a - Charge load application point23 mm
α - Contact angle25 °
rs - Min fillet radius1 mm
r1s - Min fillet radius0,3 mm
Precision classP4S
Mass0,19 kg
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PRODUCT PERFORMANCE
C - Dynamic load9,8 kN
C0 - Static load7,8 kN
Cu - Fatigue limit load0,44 kN
f0 - Coefficient8.684
Axial displacement K Factor0.56
Preload level7
Preload value0,08 kN
Axial rigidity108 N/µm
Radial rigidity242 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
Nlim - Oil lubrication limit speed27000 tr/min
Nlim - Grease lubrication limit speed18500 tr/min
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)14,876 Hz
BPFI - Characteristic inner ring frequency (60 rpm)17,124 Hz
FTF - Characteristic cage frequency (60 rpm)0,465 Hz
BSF - Characteristic rolling element frequency (60 rpm)12,841 Hz
ABUTMENT
da min - Min shoulder diameter IR65,5 mm
db min - Min IR shoulder diameter65,5 mm
Da max - Max shoulder diameter OR79,5 mm
Db max - Max OR shoulder diameter79,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius1 mm
Product classification image
Calcul factors image