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NU221 - NTN

NU221

Single row cylindrical roller bearing, floating, separable, pressed steel cage

In the cylindrical roller bearing range, the single row roller bearing withstands high radial loads. The standard ISO ranges (NU, N, NJ, NF, NUP, NH, RNU, HJ) are available with different types of cage, bore diameters, shoulder rings.

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Technical datasheet

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Specs

PRODUCT DIMENSIONS

Internal diameter d 105 mm
External diameter D 190 mm
Bearing/Inner ring width(B) 36 mm
Upper roller diameter E 168,8 mm
Under roller diameter F 126,8 mm
Min fillet radius rs 2,1 mm
Min fillet radius r1s 2,1 mm
Radial clearance class CN
Mass 3,95 kg
Brand NTN
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PRODUCT PERFORMANCE

Dynamic load, C 223 kN
Static load, C0 241 kN
Fatigue limit load, Cu 26,1 kN
Nlim (oil) 4300 tr/min
Nlim (grease) 3600 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 120 °C
Characteristic cage frequency, FTF 0,429 Hz
Characteristic rolling element frequency, BSF 6,896 Hz
Characteristic outer ring frequency, BPF0 6,863 Hz
Characteristic inner ring frequency, BPFI 9,137 Hz

ABUTMENT

Min shoulder diameter IR da min 116 mm
Small face shoulder max diameter da max 124 mm
db min 129 mm
Max shoulder diameter OR Da max 179 mm
Max fillet radius ra max 2 mm
Maxi fillet radius r1a 2 mm
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