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6404C3 - NTN


Deep groove ball bearing, radial contact, pressed steel cage, open

The single row deep-groove ball bearing is the most popular bearing. It is available in a wide range of sizes with several possible options: sealing with shields or seals, presence of a retaining ring, varied clearances, several cage types, etc.


CAD file

Technical datasheet

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Internal diameter d 20 mm
External diameter D 72 mm
Bearing/Inner ring width(B) 19 mm
Min fillet radius rs 1,1 mm
Radial clearance class C3
Mass 0,4 kg
Brand NTN
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Dynamic load, C 31,5 kN
Static load, C0 13,9 kN
Fatigue limit load, Cu 1,09 kN
Coefficient f0 11.4
Nlim (oil) 14000 tr/min
Nlim (grease) 12000 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 120 °C
Characteristic cage frequency, FTF 0,345 Hz
Characteristic rolling element frequency, BSF 2,909 Hz
Characteristic outer ring frequency, BPF0 2,068 Hz
Characteristic inner ring frequency, BPFI 3,932 Hz


Min shoulder diameter IR da min 26,5 mm
Max shoulder diameter OR Da max 65,5 mm
Max shaft & housing fillet radius ra max 1 mm
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