Technical data

NA4909R

Needle roller bearing, machined-ring, with inner ring

Needle roller bearing, machined-rings, with inner ring, double-side ribs, lubrication hole

Needle roller bearing, machined-rings, with inner ring, double-side ribs, lubrication hole
  • Visual(s)

    Visual(s)
  • Product definition

    Product definition
    d 45 mm
    D 68 mm
    C 22 mm
    F 52 mm
    rs min 0.6 mm
    s max 1 mm
    Dw 5 mm
    Lw 16.8 mm
    Lubrication hole on outer ring Oui/Yes
    k 3 mm
    Lubrication hole on inner ring Non/No
    Radial clearance class CN
    Precision class P0
    Mass 0.27 kg
    Brand NTN
  • Product performance

    Product performance
    Cr 46 kN
    C0r 73 kN
    Nlim (grease) 5,000 Tr/min
    Nlim (oil) 7,500 Tr/min
    Min operating temperature, Tmin -20 °C
    Max operating temperature, Tmax 120 °C
    Characteristic cage frequency, FTF 0.46 Hz
    Characteristic rolling element frequency, BSF 11.31 Hz
    Characteristic outer ring frequency, BPF0 10.95 Hz
    Characteristic inner ring frequency, BPFI 13.05 Hz
  • Abutment dimensions

    Abutment dimensions
    da min 49 mm
    Da max 64 mm
    ras max 0.6 mm

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