BC2B 322216

NNU type double row cylindrical roller bearings

Double row cylindrical roller bearings are designed for applications subject to heavy radial loads and high speeds. The NUB type bearings have three retaining edges on the outer ring and no retaining edges on the inner ring, allowing bi-directional axial displacement. An important feature is the separable design, which facilitates mounting, and the individual parts of the bearing are interchangeable.

  • High radial load carrying capacity
  • Low friction
  • Long service life
  • Separable design
  • Can withstand bi-directional axial displacement

+86 13817962999

Overview
Technical Parameters

Overview

Skim Through

Size

Inner Diameter320.0mm
Outer Diameter460.0mm
Width120.0mm

Performance

Basic rated dynamic load1720.0kN
Basic rated static load3600.0kN
Reference speed950.0r/min
Limiting speed1400.0r/min

Properties

Bearing parts Complete set of bearings
Axial displacement capacity In both directions
Number of columns 2
Locating features, bearing outer ring None
Hole type Cylindrical hole
Number of flanges, outer ring 3
Number of flanges, inner ring 0
Loop Flanges no
Radial clearance NSTD
Tolerance class Normal
Coating Without
Sealing Without
Lubrication without
Relubrication function without

Technical Parameters

Technical Parameters

Size

d320.0mm Hole diameter
D460.0mm Outer diameter
B120.0mm Total bearing width
D1 ≈425.0mm Outer ring flange diameter
F364.0mm Inner ring raceway diameter
r1,2 min.3.0mm Outer ring chamfer size
r3,4 min.3.0mm Inner ring chamfer size
s3.9mm Allowable axial displacement of the bearing ring relative to other rings in normal position", "qualifier" : "max.

Shoulder size

da min.334.0mm Spacer shoulder diameter
da min.334.0mm max.360.0mm Spacer Shoulder Diameter
db min.368.0mm Shaft shoulder diameter
Da max.446.0mm Spacer and housing shoulder diameter
ra max.2.5mm Chamfering radius
rb max.2.5mm Chamfering radius

Data calculation

Basic dynamic load rating C1720.0kN
Basic rated static loadC03600.0kN
Fatigue Load LimitPu335.0kN
Reference speed950.0r/min
Limit speed1400.0r/min
Calculation coefficientkr0.23

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