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Single row cylindrical roller bearings

NU312 - NTN

NU312

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 diameter60 mm
D - External diameter130 mm
B - Bearing/Inner ring width31 mm
E - Upper roller diameter113 mm
F - Under roller diameter77 mm
rs - Min fillet radius2,1 mm
r1s - Min fillet radius2,1 mm
Radial clearance classCN
Mass1,8 kg
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PRODUCT PERFORMANCE
C - Dynamic load137 kN
C0 - Static load126 kN
Cu - Fatigue limit load15,4 kN
N lim - Oil lubrication limit speed6500 tr/min
N lim - Grease lubrication limit speed5500 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR71 mm
da max - Small face shoulder max diameter75 mm
db min - Min inner ring GO diameter79 mm
Da max - Max shoulder diameter OR119 mm
ra max - Max fillet radius2 mm
r1a - Max fillet radius2 mm
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