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High precision angular contact ball bearings

7024HVUJ74 - SNR

7024HVUJ74

High precision angular contact ball bearing, 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 diameter120 mm
D - External diameter180 mm
B - Bearing/Inner ring width28 mm
d1 - External diameter inner ring139,4 mm
D1 - Inner diameter outer ring160,6 mm
D2 - Inner diameter outer ring168,91 mm
a - Charge load application point49 mm
α - Contact angle25 °
rs - Min fillet radius2 mm
r1s - Min fillet radius1 mm
Precision classP4
Mass2,15 kg
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PRODUCT PERFORMANCE
C - Dynamic load94,8 kN
C0 - Static load103 kN
Cu - Fatigue limit load4,75 kN
f0 - Coefficient16.268
Axial displacement K Factor0.4
Preload level7
Preload value0,83 kN
Axial rigidity332 N/µm
Radial rigidity714 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed10500 tr/min
N lim - Grease lubrication limit speed7000 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)10,287 Hz
BPFI - Over rolling frequency on inner (60 rpm)12,713 Hz
BSF - Over rolling frequency on rolling element (60 rpm)8,494 Hz
BRF - Rotational frequency – rolling element (60 rpm)4,247 Hz
FTF - Rotational frequency - cage (60 rpm)0,447 Hz
ABUTMENT
da min - Min shoulder diameter IR130 mm
db min - Min IR shoulder diameter130 mm
Da max - Max shoulder diameter OR170 mm
Db max - Max OR shoulder diameter170 mm
r1a - Max fillet radius1 mm
ra max - Max shaft & housing fillet radius2 mm
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