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Date: 11 May 2007 12:16:38
From: HeliCoil
Subject: HeliCoil - A gift to Engineering Designer
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HeliCoil System for Creating Stronger Internal Threads in Soft
Metals & Thread Repair / Preventive Maintenance of Engineering
Assemblies & Automotive components .
=B7Helicoil System
This article has been prepared to provide information in the area of
Screw Thread Technology for creation of Stronger & Longer lasting
threads while Designing and Producing a component or Repairing of
component having damaged female threads.
Today, Helicoil inserts are used in the Original Equipment Manufacture
of such diversified products as Aircraft , Aerospace ,Automobiles ,
Tractors ,Aluminium parts such as Heat exchangers, Power generation
equipment & Turbines, Satellite & Remote Sensing Devices, Radar and
Telecommunication equipment, Diesel Fuel injection equipment , Medical
Engineering and Industries making Component Assemblies of Soft
metals , Composite Alloys , Polymers etc.
The HeliCoil System is for creation of Stronger & Longer lasting
threads while Designing a component or Repairing of component having
damaged female threads. Repair Valves , Flanges , Generators ,
Pumps , Gas & Thermal Turbines ,
Plastic Moulds , Actuators , Utility equipment ,Spark plug thead
hole , Engine housing , Gear box housing , Oil cases & covers , Filter
covers , mirror holders , Crank housing & many more.
Helicoil creates threads better than original , longer lasting , save
repair time & are more economical..
WHY USE HeliCoil
=B7 Create Stronger and longer lasting threads in soft & light metal
components made of Aluminium , Composite Alloys or Plastics &
Polymers where internal threads of a component are prone to damage due
to operating conditions of the equipment the same are fitted in.
=B7 HeliCoil inserts are made from 18-8 grade cold rolled stainless
steel having tensile strength ranging from 1,50,000 - 2,00,000 PSI ,
Hardness between 43-50 HRC which gives a better description of how
HeliCoil inserts can withstand a good amount of assembly stress
besides creating a stronger thread in weak materials.
=B7 HeliCoil in stainless steel can be safely used in continuous
operating temperatures up to 315 degree C & occasional peak
temperature of
425 degree C .
=B7 HeliCoil are cold rolled formed & have a very superior surface
finish providing maximum surface to surface contact area , thereby
greater clamping action and minimum friction between bolt & female
thread flank.
=B7HeliCoil is Anti-Corrosive & Non- Magnetic
Made of 18-8 grade cold rolled stainless steel it provides a better
resistance to corrosion under extreme atmospheric conditions and
operational environments.
=B7HeliCoil reduces bolt failure, breaking & thread stripping
The common known causes of bolt failure and breaking or thread
stripping are over torque , thread pitch angle errors , progressive
pitch errors, high stress conditions & continuous vibrations.
In absence of HeliCoil , it has been observed that a bolt is subject
to an average tightening load of more than 70% over the first two
threads near to its collar or over a few threads finding a proper
surface contact .
The conditions even get worst when normal machined threads are
associated with threads having pitch errors and above adverse
conditions.
HeliCoil stretches itself to compensate for pitch angle errors &
progressive pitch errors thereby providing a better surface contact &
more even load distribution to prevent the bolt failures.
HeliCoil has a "designed-in" radial & axial elasticity.
This allows the shearing load to be transformed into favourable hoop
stress or radial load towards the full length of the insert. With
result the load gets more evenly transformed over the entire length
of the threads of a bolt, thus bolt breaking & thread shearing is
significantly reduced.
HeliCoil - A Gift to Designers
The above mentioned compensation & even load distribution features
allow a superior reliability of assembly and without compromising on
performance Allows the Designers to choose a bolts of lower strength ,
bolt of alternate metals, bolt having lesser length , creating
possibility of lower torque requirements for soft metals , retaining
strength of components having less wall thickness.
HeliCoil inserts are also available with a locking coil for thread
locking of screws & bolts to prevent loosening due to heavy or
continuous vibrations.
Unlike the other methods used for thread locking like adhesives , the
locking type HeliCoil is reusable for several bolt opening &
tightening cycles .
Use of HeliCoil eliminates most of the given problems as it remains in
a compressed state inside the threaded hole & holds tightly to the
wall despite variable heat expansion , vibrations & high impact
conditions. HeliCoil doesn't get loose by repeated tightening or
opening of bolt .
The HeliCoil is installed by a tool which compresses it at first to
get installed in a threaded hole after which it sits tightly against
the thread flanks , the only way it can be taken out is by using a
tool which reduces it in diameter during extraction.
HeliCoil Cuts on outsourcing repairs , reduces equipment down time &
avoid expensive conventional methods in practice.
Helicoil is an easy to use good technology & one could do it on own at
a low cost.
Website : www.helicoil.in
This article is an individual Expression , User must determine the
suitability for intended application.
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Date: 11 May 2007 15:09:04
From: Starlord
Subject: Re: HeliCoil - A gift to Engineering Designer
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And this does What to backyard Telescopes?
"HeliCoil" <helicoil@airtelbroadband.in > wrote in message
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Date: 11 May 2007 23:47:41
From: David G. Nagel
Subject: Re: HeliCoil - A gift to Engineering Designer
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Starlord wrote:
> And this does What to backyard Telescopes?
>
>
> "HeliCoil" <helicoil@airtelbroadband.in> wrote in message
>
>
Plenty. I used one to repair the dec lock on my Meade LX200 gps when I
stripped the thread when I was installing a Peterson Engineering dry
clamp. The fitting that I was tapping to increase the bolt size
according to the installation instructions came unstuck (it was pressed
into the casting) and fell back into the support arm. Pete advised me to
install the HeliCoil to repair the mistake. I still have a bunch of
extra coils if anyone needs one. See me off group.
Dave Nagel
LX200 GPS SMT SAP UHTC 10" Wireless
Peterson enhanced
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Date: 11 May 2007 15:33:45
From: Jan Owen
Subject: Re: HeliCoil - A gift to Engineering Designer
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"Starlord" <starlord@sidewalkastronomy.info > wrote in message
news:EeKdnXgHlbgSd9nbnZ2dnUVZ_tWhnZ2d@inreach.com...
> And this does What to backyard Telescopes?
>
About the same as your response to it...
--
Jan Owen
To reach me directly, remove the Z, if one appears in my e-mail address...
Latitude: 33.6
Longitude: -112.3
http://community.webshots.com/user/janowen21
>
> "HeliCoil" <helicoil@airtelbroadband.in> wrote in message
>
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