NCF 2228 ECJB

NCF type single row high load bearing cylindrical roller bearings

JOJI single row high load carrying capacity cylindrical roller bearings have the high load carrying capacity of full complement roller bearings and the high speed capacity of bearings with cages. They are designed for use in industrial gearboxes, wind turbine gearboxes and mining equipment. Their internal design allows the bearings to be axially displaced in one direction. The bearings are of non-separable design.

  • High radial load carrying capacity
  • High speed capability
  • High radial stiffness
  • Long service life
  • Unidirectional axial positioning of the shaft is possible

+86 13817962999

Overview
Technical Parameters

Overview

Skim Through

Size

Inner Diameter140.0mm
Outer Diameter250.0mm
Width68.0mm

Performance

Basic rated dynamic load680.0kN
Basic rated static load880.0kN
Reference speed2800.0r/min
Limiting speed3600.0r/min
JOJI Performance Class JOJI

Properties

Bearing parts Complete set of bearings
Axial displacement capacity In one direction
Number of columns 1
Locating feature, bearing outer ring None
Hole type Cylindrical bore
Cage Steel plate
Design Non-detachable
Number of flanges, outer ring 1
Number of flanges, inner ring 2
Loop flange no
Radial clearance CN
Tolerance class Normal
Coating Without
Sealing Without
Lubrication without
Relubrication function without

Technical Parameters

Technical Parameters

Size

d140.0mm Hole diameter
D250.0mm Outer diameter
B68.0mm Width
d1 ≈179.7mm Diameter of inner ring retaining edge
D1 ≈215.7mm Outer ring edge diameter
E225.0mm Outer ring raceway diameter
s4.4mm Allowable axial displacement of the normal position bearing ring relative to other rings", "qualifier" : "max.
r1,2 min.3.0mm Chamfering dimensions

Shoulder dimensions

da min.154.0mm Shaft shoulder diameter
da max.174.0mm Shaft shoulder diameter
Da min.220.0mm Bearing housing shoulder size
Da max.235.0mm Bearing housing shoulder size
ra max.2.5mm Chamfering radius
ra max.2.5mm Chamfering radius

Data calculation

JOJI Performance Class JOJI
Basic dynamic load rating C680.0kN
Basic static load ratingC0880.0kN
Fatigue Load LimitPu96.5kN
Reference speed2800.0r/min
Limit speed3600.0r/min
Calculation coefficientkr0.16

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