PIP Hand Protection Catalogue - Flipbook - Page 48
Not so many years ago, we believed that the answer to solving Vibration transmission
was a good quality Gel or Foam absorption material in the palm and fingers of a glove.
These so called “Anti-Vibration” gloves were the best protection for those who worked
with harmful HAV shock producing equipment and machinery
Gloves can be very valuable in reducing Hand Arm Vibration Syndrome. Anti Vibration
gloves have applications of high protection as well as “No Go” zones where they have
little effect or might even be slightly harmful. This information will help to guide you to
the right solution!
In recent years, study undertaken by ANSI towards the
effectiveness of P.P.E against vibration reduction, helped
recognise that there is no fact, such thing as an overall
effective Anti Vibration glove. In there are certain vibration
range frequencies that actually increase the wave band
intensity (harmful Vibration strength) through the type of ‘shock
absorbing’ materials being used in the glove manufacture.
P.I.P Australia in partnership with Eureka Safety have been at
the leading edge of this developing science. Investigating how
various shock absorbing materials act differently throughout
the vibration transmission wave band frequencies. From the
developing Vibration Standard testing we can prove how each
glove performs in the task of reducing harmful transmissions
across various frequency wave bands
IMPACT VIBRATION RANGE
An Anti Vibration glove is not worthy of its
title unless it can be tested & proven to
match the required vibration reduction. At
a minimum it should have certification to
EN10819 testing.
From a better understanding of the Vibration frequency range
and its effect on shock absorption materials. The breakthrough
discovery is that at very low vibration frequencies, no
materials (to date) are totally effective in removing the vibration
transmissions in total. In fact, most materials actually increase
the vibration at certain stages of the frequency wave band,
therefore it would be better to have no padding at all in these
frequency range circumstance
From this new understanding of how
slower vibrating tools and equipment
create harmful amounts of HAV (Hand
Arm Vibration), we have created a glove
best suited to the lower spectrum of the
Vibration Frequency range
Hand arm vibration syndrome and vibration induced
white finger syndrome.
The Eureka Flexi Vibration Code: EVIB-FLEXI In an effort to
better protect the wearer against lower revving RPM tools, it
has no padding on the fingers.
The shock absorbing palm padding material in these gloves
has been specifically designed and rigorously tested to provide
the most efficient performance in reducing harmful vibration
transmission all the way up to a frequency range of 350Hertz
(or 21,000 RPM).
These lower revolution tools and equipment are commonly
used in Mechanical workshops (tyre fitting, assembly rattler
guns); Lawn & garden care (Chain saws and brush cutters);
Engineering works (Grinders, sanders) etc.
For Tools and equipment at the high-speed revolution
spectrum above 350Hz (21,000RPM), such as pneumatic air
grinders; or high-speed cutters, we have the Impact Eureka
Vibration glove Code: EIMP-VIB with specially developed
vibration reducing padding in the fingers & palm.
For more information on this topic visit:
www.pipaus.com/article
• Blue curve illustrates sensitivity to hand Arm Vibration syndrome (ISO 5349-1
• Orange Curve illustrates sensitivity to Vibration induced White Finger Syndrome
• Average vibration stated is always as adjusted with blue curve above unless specified as “unweighted”.
Practical Advice
Legal Limits in Eu
Real life situations may vary a lot compared to laboratory test
conditions. Different people and working positions as well as
the tool type, maintenance status of the tool and type of work
show large variations in test results.
Daily average weighted accelerations above 2,5 m/s2 must
be considered and above 5,0 m/s2 is prohibited according
to EU Directive 2002/44/EC. Eureka advise to map the main
frequencies of the vibration exposure in order to fulfill article
4a) in the above directive in a relevant way.
Other very important factors are:
Cold conditions can increase damage to the hand;
High grip force can significantly increase damage and reduce
glove protection effectiveness.
Vibration Sources
Vibrations are generated by machine motor (rpm), secondary disturbances are usually at higher frequencies and very high
frequency transient vibrations from impacting tools.
THE FINGERS ARE MOST SUSCEPTIBLE TO
LOWER FREQUENCY VIBRATING TOOLS AS
THESE INDIVIDUALLY LIGHTER & THINNER
APPENDAGES ARE PRONE TO AMPLIFY
VIBRATION MUCH MORE READILY THAN THE
MORE SOLID & MEATIER PARTS OF THE HAND
SUCH AS PALM & WRIST
PROTECTIVE INDUSTRIALPRODUCTS
IMPACT
VIBRATION RANGE
al Oscillation Acceleration m/s2
Transient Vibration
Amplitute
• Frequency = oscillations per second
• RPM = Rotations per minute
• 100 Hz = 6000 rpm, 500 Hz = 30 000 rpm
Transient Vibration = High frequency, short duration
IMPACT VIBRATION RANGE
PROTECTIVE INDUSTRIALPRODUCTS
REDUCING HARMFUL
VIBRATION TRANSMISSION
Acceleration is the speed change per second and best measurement of vibration strength.
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