Trelleborg
Novibra
Vibrations
can occur in many different ways frequently causing physical
injury i.e. muscle fatigue, damage to hearing, mental strain,
but also damage to buildings as well as material fatigue. The
choice of anti-vibration mountings depends on the application
and its environment.
Novibra, a well known name in the vibration isolation market
can, supported by the latest computer facilities, provide optimum
solutions to make the correct choice of mountings for specific
vibration problems. The Novibra range comprises a selection
of different mountings covering up to 99% of all applications.
Trelleborg Novibra is one of Europe's leading companies when
it comes to anti-vibration mountings. It is part of Trelleborg
Industry AB, belonging to the Trelleborg Group, and manufacturing
all kinds of rubber products.
How to select Novibra mountings.
Hardness
To avoid too many sizes, a selection of 2 rubber hardnesses
is available for most of the models. These are expressed as
hardness A ( 40 shore ¨A¨ ) or hardness B ( 60 shore
¨A¨) clearly marked on either the mounting's rubber
body or the bottom metal plate.
Key questions
-
Type
of machinery.
-
Total
weight of machinery.
-
Number
of mountings.
-
Interfering
frequency, ( r.p.m. – c.p.m. – Hz )
-
Installation
environment.
Selection of mounting - some basics
-
Type
RA, RAEM or M for most machinery subject to vibration. Selection
depends on desired degree of isolation, type of
machinery, interfering frequency, site, etc.
-
Type
GK or SAW isolate vibration on heavy machinery .
-
Shock-absorption
should preferably be isolated by means of a "soft"
mounting, e.g. type M.
-
Machine
mounting type TF (Trell Foot) can be recommended for most workshop
machines, but should be avoided for compressors,
generators or similar machinery on suspended floors.
Degree
of isolation
Generally discussed as percentage (%) of isolation or degrees of
isolation. The higher the figure the more effective the mounting
is in the installation. For a specific machinery installation the
objective is to decide upon the degree of isolation. In the first
place this is determined by the environment where the machinery
is to be situated. The type and brand of machine is only seen as
a secondary consideration.
Selection of degree of isolation – Some basics
-
In
a sensitive environment, the highest possible degree of isolation
should be attained.
-
The
higher the speed range the more a machine is subject to out
of balance forces and vibration.
-
In
such cases a high degree of isolation can be achieved with type
RA or RAEM.
-
For
low interference frequencies, a "soft" mounting should
be selected.
-
Soft
mountings provide higher degrees of isolation.
-
A
high degree of isolation assures a quiet environment.
Novibra
AV-mountings
An
effective and natural way to protect people and machinery from
unnecessary strain caused by damaging vibrations and shocks.
In most cases a small investment will limit unpleasant noise and
very often lead to a prolonged life of valuable machinery.
Some good reasons to select Novibra
-
Covering
up to 99% of all applications
-
Expert
technical advice
-
Stock
supplies
-
Easy
to install
-
Low
installation profile
-
No
maintenance
-
Wide
selection range
-
Load
rating options 1- 60,000 kg / per mounts
-
Isolation
degree up to 98%
-
Computer
technical support
For more
technical information please contact us.
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