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Bearing NRT 325 B (SKF)

Axial-radial cylindrical roller bearings, super-precision NRT 325 B

Bearing number : NRT 325 B

Size (mm) : 325x450x60

Brand : SKF

Bore Diameter (mm) : 325

Outer Diameter (mm) : 450

Width (mm) : 60

Bearing dimensions and specification in SKF catalogue:

d - 325 mm

D - 450 mm

H - 60 mm

d₁ - 415 mm

C - 20 mm

H₁ - 40 mm

J - 342 mm

J₁ - 430 mm

H - 9.3 mm

N₁ - 15 mm

N₂ - 9.3 mm

a - 8.2 mm

r₁ - min. - 0.6 mm

r₂ - min. - 0.6 mm

Basic dynamic load rating, radial direction - C - 134 kN

Basic static load rating, radial direction - C₀ - 450 kN

Basic dynamic load rating, axial direction - C - 153 kN

Basic static load rating, axial direction - C₀ - 1660 kN

Limiting speed for grease lubrication - 110 r/min

Limiting speed for oil lubrication - 220 mm/min

Axial Preload - 12 N

Axial unloading force - 26 kN

Frictional moment - C_RL - 45 N·m

axial stiffness - 28.6 N/micron

radial stiffness - 8.9 N/micron

Moment stiffness - 427000 kN·m/mrad

Mass bearing - 25 kg

Guideline diameter - 700 mm

Size - G - M12

Number of bolts - 3

Angle between bolts - 120 °

Size bolts - M8

Pitch - &alfa; - 10 °

Number of bolts - 33

Number of bolts omitted at removal thread position - 3, 120° apart

Size bolts - M8

Pitch - &alfa; - 10 °

Number of bolts - 34

Number of bolts omitted at retaining bolts position - 2, 180° apart

Tightening torque - 34 N·m

Size - M8

Number of bolts - 2

Tags :  SKF , 325x450x60