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Bearing NRT 120 B (SKF)

Axial-radial cylindrical roller bearings, super-precision NRT 120 B

Bearing number : NRT 120 B

Size (mm) : 120x210x40

Brand : SKF

Bore Diameter (mm) : 120

Outer Diameter (mm) : 210

Width (mm) : 40

Bearing dimensions and specification in SKF catalogue:

d - 120 mm

D - 210 mm

H - 40 mm

d₁ - 184 mm

C - 12 mm

H₁ - 26 mm

J - 135 mm

J₁ - 195 mm

H - 7 mm

N₁ - 11 mm

N₂ - 7 mm

a - 6.2 mm

r₁ - min. - 0.6 mm

r₂ - min. - 0.3 mm

Basic dynamic load rating, radial direction - C - 64.4 kN

Basic static load rating, radial direction - C₀ - 140 kN

Basic dynamic load rating, axial direction - C - 72 kN

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

Limiting speed for grease lubrication - 230 r/min

Limiting speed for oil lubrication - 460 mm/min

Axial Preload - 2 N

Axial unloading force - 4.4 kN

Frictional moment - C_RL - 6 N·m

axial stiffness - 8.5 N/micron

radial stiffness - 4.5 N/micron

Moment stiffness - 23000 kN·m/mrad

Mass bearing - 4.8 kg

Guideline diameter - 315 mm

Size - G - M8

Number of bolts - 3

Angle between bolts - 120 °

Size bolts - M6

Pitch - &alfa; - 15 °

Number of bolts - 21

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

Size bolts - M6

Pitch - &alfa; - 15 °

Number of bolts - 22

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

Tightening torque - 14 N·m

Size - M6

Number of bolts - 2

Tags :  SKF , 120x210x40