• English
  • Français
  • Deutsch
  • Italiano
  • Español
  • Português do Brasil
  • Polski
  • Русский
  • Türkçe

High precision angular contact ball bearings

7213HG1UJ74 - SNR

7213HG1UJ74

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 diameter65 mm
D - External diameter120 mm
B - Bearing/Inner ring width23 mm
d1 - External diameter inner ring82,8 mm
D1 - Inner diameter outer ring102,3 mm
D2 - Inner diameter outer ring109,98 mm
a - Charge load application point33 mm
α - Contact angle25 °
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1,1 mm
Precision classP4
Mass1,14 kg
undefined
PRODUCT PERFORMANCE
C - Dynamic load66,4 kN
C0 - Static load54,9 kN
Cu - Fatigue limit load3,05 kN
f0 - Coefficient15.035
Axial displacement K Factor0.52
Preload level7
Preload value0,59 kN
Axial rigidity227 N/µm
Radial rigidity484 N/µm
Tmin - Min operating temperature-30 °C
Tmax - Max operating temperature120 °C
N lim - Oil lubrication limit speed15500 tr/min
N lim - Grease lubrication limit speed10500 tr/min
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)6,756 Hz
BPFI - Over rolling frequency on inner (60 rpm)9,244 Hz
BSF - Over rolling frequency on rolling element (60 rpm)5,686 Hz
BRF - Rotational frequency – rolling element (60 rpm)2,843 Hz
FTF - Rotational frequency - cage (60 rpm)0,422 Hz
ABUTMENT
da min - Min shoulder diameter IR73,5 mm
db min - Min IR shoulder diameter73,5 mm
Da max - Max shoulder diameter OR111,5 mm
Db max - Max OR shoulder diameter111,5 mm
r1a - Max fillet radius1 mm
ra max - Max shaft & housing fillet radius1,5 mm
undefined