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High precision angular contact ball bearings

ML7012CVUJ74S - SNR

ML7012CVUJ74S
ML7012CVUJ74S
ML7012CVUJ74S
ML7012CVUJ74S

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 is getting sub-ranges dedicated to requirements of speed, sealing, specific greasing, etc.

Documentation

Product information

PRODUCT DEFINITION
BrandSNR
d - Internal diameter60 mm
D - External diameter95 mm
B - Bearing/Inner ring width18 mm
d1 - External diameter inner ring71,9 mm
d2 - External diameter inner ring70,1 mm
D1 - Inner diameter outer ring84,91 mm
D2 - Inner diameter outer ring88,11 mm
a - Charge load application point21 mm
α - Contact angle17 °
rs - Min fillet radius1,1 mm
r1s - Min fillet radius1 mm
Precision classP4S
Mass0,426 kg
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PRODUCT PERFORMANCE
C - Dynamic load17 kN
C0 - Static load12 kN
Cu - Fatigue limit load0,66 kN
f0 - Coefficient8.327
Axial displacement K Factor0.99
Preload level7
Preload value0,09 kN
Axial rigidity65 N/µm
Radial rigidity318 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed28000 tr/min
N lim - Grease lubrication limit speed21000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)10,809 Hz
BPFI - Over rolling frequency on inner (60 rpm)13,191 Hz
BSF - Over rolling frequency on rolling element (60 rpm)9,542 Hz
BRF - Rotational frequency – rolling element (60 rpm)4,771 Hz
FTF - Rotational frequency - cage (60 rpm)0,45 Hz
ABUTMENT
da min - Min shoulder diameter IR67 mm
db min - Min IR shoulder diameter67 mm
Da max - Max shoulder diameter OR88 mm
Db max - Max OR shoulder diameter88 mm
r1a - Max fillet radius1 mm
ra max - Max shaft & housing fillet radius1 mm
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