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.


CAD file

Technical datasheet

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Internal diameter (d) 30 mm
External diameter (D) 55 mm
Bearing/Inner ring width (B) 13 mm
External diameter inner ring d1 38,1 mm
External diameter inner ring (d2) 36,15 mm
Inner diameter outer ring (D1) 48,55 mm
Inner diameter outer ring D2 50,15 mm
Charge load application point a 13 mm
Contact angle α 17 °
Min fillet radius (rs) 1 mm
Min fillet radius r1s 0,6 mm
Coefficient f0 7.983
Precision class P4S
Mass 0,112 kg
Brand SNR
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Dynamic load (C) 8,1 kN
Static load (C0) 4,7 kN
Fatigue limit load (Cu) 0,27 kN
Axial displacement K Factor 1.38
Preload level 8
Preload value 0,12 kN
Axial rigidity 53 N/µm
Radial rigidity 250 N/µm
Min operating temperature (Tmin) -30 °C
Max operating temperature (Tmax) 120 °C
Nlim (oil) 52000 tr/min
Nlim (grease) 38000 tr/min
Characteristic cage frequency, FTF 0,436 Hz
Characteristic rolling element frequency, BSF 7,384 Hz
Characteristic outer ring frequency, BPF0 8,726 Hz
Characteristic inner ring frequency, BPFI 11,274 Hz


Min shoulder diameter IR (da min) 35,5 mm
Min IR shoulder diameter (db min) 35,5 mm
Max shoulder diameter OR (Da max) 49,5 mm
Max OR shoulder diameter (Db max) 49,5 mm
Maxi fillet radius r1a 0,6 mm
Max shaft & housing fillet radius (ra max) 1 mm
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Calcul factors image