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6944C3 - NTN


Deep groove ball bearing, radial contact, machined 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 220 mm
External diameter D 300 mm
Bearing/Inner ring width(B) 38 mm
Min fillet radius rs 2,1 mm
Radial clearance class C3
Mass 7,69 kg
Brand NTN
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Dynamic load, C 178 kN
Static load, C0 180 kN
Fatigue limit load, Cu 7,55 kN
Coefficient f0 16.4
Nlim (oil) 2300 tr/min
Nlim (grease) 2000 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 120 °C
Characteristic cage frequency, FTF 0,451 Hz
Characteristic rolling element frequency, BSF 10,139 Hz
Characteristic outer ring frequency, BPF0 7,67 Hz
Characteristic inner ring frequency, BPFI 9,33 Hz


Min shoulder diameter IR da min 231 mm
Max shoulder diameter OR Da max 289 mm
Max shaft & housing fillet radius ra max 2 mm
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