GN 342.2

Stelvoeten, stelelementen

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Omschrijving

1Specification

Type

  • Type SV: with damping element

Steel

  • Tensile strength class 5.8
  • zinc plated, blue passivated

Damping element

Elastomer (PUR)

  • Sylomer SR 450-12
  • anti-slip, glued
  • grey
  • oil resistant
  • Operating range form -30 °C up to 70 °C

Hexagon nut ISO 4032

Steel zinc plated, blue passivated

2Information

The specified load in the table of the levelling feet GN 342.2 is a recommendation up to which the damping element can be permanently subjected.

This static load equals a thrust on the area of 0.4 N/mm2 at which the damping material reaches its optimum dynamic damping ability. This also takes into account an additional load up to 0.6 N/mm2 in the event of a dynamic load.

Levelling feet GN 342.1 cannot be disassembled.

3Technical information
  • Elastomer characteristics 
  • Strength values 
4Vibration absorption - Performance graph

When using levelling feet GN 342.2 the following differentiation in vibration absorption is made:

Active vibrations:

Vibrations transmitted to surroundings or associated equipment from working machinery for example.

Passive vibrations:

Vibrations transmitted to equipment or parts from vibrating surroundings or bases.

The efficiency of vibration absorption is dependent upon the interference frequency of the vibration to be absorbed as well as on the resonant frequency of the damping element itself.

A vibration absorbing effect is only achieved when the interference frequency is greater than √2-times the resonant frequency of the damping element. The greater the difference [∆] between the two, the better the damping effect.

The resonant frequency of the damping pad is dependant upon type (composition) of the material cross section and the static load.

The graphs on the left show all the required data of the standard material (SR 450-12) of the damping element. Damping elements with other absorption properties are available on request.

 

Example

Assume a load per levelling foot: 400 N

Compression levelling foot d1 = 32

400 N / 707 mm2 = 0.57 N/mm2

Compression levelling feet d1 = 40

400 N / 11340 mm2= 0.34 N/mm2

Therefore levelling feet with d1 = 40, that exert a pressure of 0.4 N/mm2 should be preferred.

The above graph shows:

Resonant frequency with compression 0.34 N/mm2: 17.5 Hz

The lower graph shows:

Degree of isolation at 66 Hz interference frequency (P1): 92 %

Degree of isolation at 98 Hz interference frequency (P2): 97 %

At approximately 200 Hz interference frequency the degree of isolation is 100 %.

 

Scroll horizontaal onderaan de tabel en / of selecteer filters voor het gewenste resultaat

Code

Omschrijving

Aantal

Prijs

Bestel

CAD

l4 samendrukking in Nmm a2 0

Belast. in N bij compr. in 04 Nmm2

d3

l4 samendrukking in Nmm a2 04

Gewicht

AF

d1

l1

l2

l3

l4 samendrukking in Nmm a2 06

Demp. element

d2

Selecteer
101301015 GN 342.2-32-M10-50-SV
€ 10,05
5.5 280 30 3.8 107 15 32 50 29 11 2.7 707 M 10
101301025 GN 342.2-32-M10-80-SV
€ 10,24
5.5 280 30 3.8 122 15 32 80 29 11 2.7 707 M 10
101301046 GN 342.2-40-M12-63-SV
€ 11,85
6 450 38 4.3 170 17 40 63 30 9.5 3.3 1134 M 12
101301045 GN 342.2-40-M12-100-SV
€ 12,72
6 450 38 4.3 189 17 40 100 30 9.5 3.3 1134 M 12
101301035 GN 342.2-50-M12-63-SV
€ 16,47
6.5 720 48 4.9 208 17 50 63 30.5 9 3.9 1809 M 12
101301047 GN 342.2-50-M12-100-SV
€ 16,47
6.5 720 48 4.9 233 17 50 100 30.5 9 3.9 1809 M 12
101300995 GN 342.2-60-M16-80-SV
€ 20,73
7 1050 58 5.5 430 24 60 80 37.5 10 4.4 2641 M 16
101301005 GN 342.2-60-M16-125-SV
€ 21,30
7 1050 58 5.5 495 24 60 125 37.5 10 4.4 2641 M 16