GN 342.2 Levelling feet with vibration dampening, with threaded stud

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Product description

Information

The specified load in the above table is a recommendation up to which the dampening insert can be permanently subjected.

This static load equals a thrust on the area of 0,4 N/mm2, at which the dampening material reaches its optimum dynamic dampening 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 342.2 cannot be disassembled.

Specification

Steel
  • Tensile strength class 5.8
  • zinc plated, blue passivated

Dampening element
Elastomer (PUR)
  • Sylomer SR 450-12
  • anti-slip, glued
  • gray
  • oil resistant
  • Operating range from -30 °C up to +70 °C

Hexagon nut ISO 4032
Steel zinc plated, blue passivated

RoHS

Technical drawing

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GN 342.2 Levelling feet with vibration dampening, with threaded stud sketch

Article options / Table

Type

SVwith dampening element
Show / Hide columns
d1d2l1d3l2l3l4
Compression
in N/mm²
0



0,4



0,6
A/FArea dampening
element in mm²
Load in
N by compression
0,4 N/mm²
(see information)
32M 1050803029115,53,82,715707280
40M 126310038309,564,33,3171134450
50M 12631004830,596,54,93,9171809720
60M 16801255837,51075,54,42426411050

Build & Price

Foot diameter d1
Thread d2
Thread length l1
Type

Vibration absorption - Performance graph

When using levelling feet GN 342.1 / 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 dampening element itself.

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

The resonant frequency of the dampening 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 dampening element. Dampening 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 foot d1 = 40

400 N / 1134 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%.

Selected Part (How to order)

Weight: 0,107 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone+49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).
Please note our quantity discounts.
With a total value (net) per order:
from 150 Euro -> 10 % discount
from 250 Euro -> 20 % discount
from 350 Euro -> 30 % discount
All prices in accordance with our price list No. 51, valid from 1 February 2018, plus VAT only valid for Germany.

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