NJ 303 ECP

Single row cylindrical roller bearings type NJ

Single row cylindrical roller bearings are designed for applications subject to heavy radial loads and high speeds. The NJ type bearings have an integral retaining edge on both sides of the outer ring and a retaining edge on one side of the inner ring, allowing unidirectional 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
  • Unidirectional axial positioning of the shaft possible
  • Separable design

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Overview
Technical Parameters

Overview

Skim Through

Size

Inner Diameter17.0mm
Outer Diameter47.0mm
Width14.0mm

Performance

Basic rated dynamic load28.5kN
Basic rated static load20.4kN
Reference speed17000.0r/min
Limiting speed20000.0r/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 Non-metallic
Number of flanges, outer ring 2
Number of flanges, inner ring 1
Flanges no
Radial clearance CN
Tolerance class Normal
Coating Without
Sealing Without
Lubrication without
Relubrication function without

Logistics

Net weight0.12kg
UNSPSC Code 31171505

Technical Parameters

Technical Parameters

Size

d17.0mm Hole diameter
D47.0mm Outer diameter
B14.0mm Width
d1 ≈27.7mm Diameter of inner ring retaining edge
D1 ≈36.75mm Outer ring edge diameter
F24.2mm Inner ring raceway diameter
r1,2 min.1.0mm Chamfer size
r3,4 min.0.6mm Chamfer size
s1.0mm Allowable axial displacement", "qualifier" : "max.

Shoulder size

da min.22.1mm Spacer diameter
max.23.1mm max.23.1mm Spacer Diameter
db min.29.0mm Shaft shoulder diameter
Da max.41.7mm Bearing housing shoulder diameter
ra max.1.0mm Radius of rounded corners

Data calculation

JOJI Performance Class JOJI
Basic dynamic load rating C28.5kN
Basic static load ratingC020.4kN
Fatigue Load LimitPu2.55kN
Reference speed17000.0r/min
Limit speed20000.0r/min
Minimum load factorkr0.15
Limit value e0.2
Calculation coefficient Y0.6

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