SKF NN3009TN/SP bearing

45x75x23

with a large quantity of counterfeit SKF bearings, mill manage-ment asked SKF to conduct an inspection. The mill reported that, after two to three hours of operation, the replacement bearings were performing so poorly, so the mill's maintenance team was forced to shut down the machinery, dismount the bearings, and remount the older bearings.



Cylindrical roller bearings, double row, super-precision NN 3009 TN/SP

Bearing number : NN 3009 TN/SP

Size (mm) : 45x75x23

Brand : SKF

Bore Diameter (mm) : 45

Outer Diameter (mm) : 75

Width (mm) : 23

Bearing dimensions and specification in SKF catalogue:

d - 45 mm

D - 75 mm

B - 23 mm

d1 - 56.3 mm

E - 67.5 mm

r1,2 - min. - 1 mm

r1,2 - min. - 1 mm

s - 1.5 mm

da - min. - 50 mm

Da - min. - 69 mm

Da - max. - 70 mm

ra - max. - 1 mm

ra - max. - 1 mm

dn - 66.4 mm

Basic dynamic load rating - C - 50.1 kN

Basic static load rating - C0 - 65.5 kN

Fatigue load limit - Pu - 7.6 kN

Limiting speed for grease lubrication - 12000 r/min

Limiting speed for oil lubrication - 14000 mm/min

Gref - 2.4 cm

Static radial stiffness (guideline value) - 940 N/micron

Mass bearing - 0.38 kg

Bearing NN 3009 TN/SP Bearing NN 3009 TN/SP

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