SKF NNU4921BK/SPW33 Cylindrical roller bearings,SKF NNU 4921 BK/SPW33 Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Cylindrical roller bearings -- Cylindrical roller bearings, double row, super-precision -- SKF NNU 4921 BK/SPW33

NNU 4921 BK/SPW33

Dimensions
d 105mm
D 145mm
B 40mm
D1 130.8mm
F 118mm
b 5.5mm
K 3mm
r1,2min.1.1mm
r3,4min.0.6mm
smax.1.1mm

Tapered bore, taper 1:12

Abutment dimensions
damin.111mm
damax.116mm
Damax.138.5mm
dn 119mm
Calculation data
Basic dynamic load ratingC 130kN
Basic static load ratingC0 260kN
Fatigue load limitPu 30kN
Attainable speed for grease lubrication  5300r/min
Attainable speed for oil-air lubrication  6000r/min
Reference grease quantityGref 15cm³
Static radial stiffness (guideline value)  3040N/µm
Mass
Mass bearing  2kg
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