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NU321 - NTN

NU321

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

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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.

Documentation

Product information

PRODUCT DEFINITION
BrandNTN
d - Internal diameter105 mm
D - External diameter225 mm
B - Bearing/Inner ring width49 mm
E - Upper roller diameter195 mm
F - Under roller diameter135 mm
rs - Min fillet radius3 mm
r1s - Min fillet radius3 mm
Radial clearance classCN
Mass8,53 kg
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PRODUCT PERFORMANCE
C - Dynamic load355 kN
C0 - Static load360 kN
Cu - Fatigue limit load37,5 kN
N lim - Oil lubrication limit speed3700 tr/min
N lim - Grease lubrication limit speed3100 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR118 mm
da max - Small face shoulder max diameter132 mm
db min - Min inner ring GO diameter137 mm
Da max - Max shoulder diameter OR212 mm
ra max - Max fillet radius2,5 mm
r1a - Max fillet radius2,5 mm
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