High precision angular contact ball bearing, moulded polyamide cage centred on balls

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.


3D file

Technical datasheet

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d - Internal diameter 20 mm
D - External diameter 42 mm
B - Bearing/Inner ring width 12 mm
d1 - External diameter inner ring 28,1 mm
d2 - External diameter inner ring 26,4 mm
D1 - Inner diameter outer ring 34,9 mm
D2 - Inner diameter outer ring 38,4 mm
a - Charge load application point 13,4 mm
α - Contact angle 25 °
rs - Min fillet radius 0,6 mm
r1s - Min fillet radius 0,3 mm
Precision class P42
Mass 0,067 kg
Brand NTN
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C0 - Static load 6,3 kN
f0 - Coefficient 14.4
Nlim - Oil lubrication limit speed 52100 tr/min
Nlim - Grease lubrication limit speed 32200 tr/min
Preload level GN
Preload value 0,108 kN
Axial rigidity 78,9 N/µm
Radial rigidity 164,6 N/µm
Tmin - Min operating temperature -20 °C
Tmax - Max operating temperature 120 °C
FTF - Characteristic cage frequency 0,409 Hz
BSF - Characteristic rolling element frequency 4,799 Hz
BPFO - Characteristic outer ring frequency 4,905 Hz
BPFI - Characteristic inner ring frequency 7,095 Hz


da min - Min shoulder diameter IR 24,5 mm
Da max - Max shoulder diameter OR 37,5 mm
Db max - Max OR shoulder diameter 39,5 mm
r1a - Max fillet radius 0,3 mm
ra max - Max shaft & housing fillet radius 0,6 mm
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