NN 3006 KTN/VQ497

Double row cylindrical roller bearings

Double row cylindrical roller bearings are designed for applications with high to very heavy radial loads and medium to high speeds. The SKF product range comprises a wide range of designs and types, such as standard and full complement rollers as well as pre-filled grease and sealed bearings. Depending on the construction of the inner and outer rings, the bearings are available in locating and non-locating designs.

  • High or very high radial load capacity
  • Very low friction
  • Long service life

+86 13817962999

Overview
Technical Parameters

Overview

Skim Through

Size

Inner Diameter30.0mm
Outer Diameter55.0mm
Width19.0mm

Performance

Basic rated dynamic load30.8kN
Basic rated static load37.5kN
Grease Lubrication Reachable Speed17000.0r/min
Oil-air lubrication reachable speed19000.0r/min

Properties

Bearing parts Complete set of bearings
Number of columns 2
Hole type Taper 1:12
Cage Non-metallic
Design NN
Number of flanges, outer ring 0
Number of flanges, inner ring 3
Loop Flanges no
Radial clearance NSTD
Tolerance Grade Grade SP (SP)
Material, bearing Bearing steel
Coated without
Sealing Without
Lubricant without
Relubrication function without

Logistics

Net weight0.179kg
eClass Code 23-05-09-01
UNSPSC Code 31171505

Technical Parameters

Technical Parameters

Size

d30.0mm Hole diameter
D55.0mm Outer diameter
B19.0mm Width
d1 min.40.1mm Inner ring retaining edge diameter (NN design)
E48.5mm Outer ring raceway diameter (NN design)
r1,21.0mm Outer ring chamfer size
r3,4 min.0.6mm Inner ring chamfer size (tapered bore bearing)
s1.5 mm Permissible axial displacement of one ring relative to the other in normal position bearings (all)", "qualifier" : "max.

Shoulder size

da min.35.0mm Shaft shoulder diameter
Da min.49.0mm Bearing housing shoulder size
Da max.50.0mm Bearing housing shoulder size
ra max.1.0mm Chamfering radius
dn Injector nozzle position (TNHA cage not selectable)47.8mm

Data calculation

Basic dynamic load rating C30.8kN
Basic rated static loadC037.5kN
Fatigue Load LimitPu 4kN
Allowable speed for grease lubrication 17000r/min
Allowable speed for oil-air lubrication 19000r/min
Reference grease quantityGref 1cm³
Axial static stiffness (guide value) 690N/µm

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