helicoil

The HeliCoil Technology
An advanced technology for creation of stronger & longer lasting threads while Designing and Producing a component or Repairing a component having damaged female threads.

The need for Helicoil arose over sixty year back when Aircraft industry , designing larger and heavier Aero -planes , had to utilize lighter raw materials for their production. At first, thread inserts were used for repair of damaged or stripped threads, subsequently due to repeated thread failure, the inserts were installed in original manufacture of Engine and other components to ensure protection against repeated thread failure.

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 the result 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 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 , strengthening components having less wall thickness.

Helicoil is superior to threaded bush / plain bush inserts

Threaded bush are wound inside the threaded hole like a fastener & plain bush are press fitted in to a hole. Some bushes may be available with extra locking features.
The problem normally encountered with bush is the tendency of getting loose ,during bolt tightening or opening cycle , due to vibrations , impacts , stress wear & creep factor & in some cases due to differential heat expansion ratio of bush and original component ,as co-efficient of heat expansion varies between two different metals. Moreover once a bush gives away ,the next step is to go in for a larger hole.
Bush being thicker also reduce the remainder wall thickness of a component thus making a component weaker.

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 doesnt get loose by repeated tightening or opening of a bolt .
To know more on product download technical catalogs from site www.helicoil.in

Category:

Science & Technology

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• helicoil

[Philscbx]

I've processed 100's Aluminum messed up threads brought in by Honda owners in cylinder heads to fork tubes.

HeliCoil has never failed.

In cases where a locking thread is desired at the bottom of hole, I make my own by reshaping the tap to a rolled thread action so that after coil is set in, the bolt now has to force the coil deeper into aluminum block material

[LRWmagazine]

@sjkoerner only when the bolt is in that far,... I doubt that is all true..

[sjkoerner]

yes, of course metal stretches -- so how does that explain why the top two threads carry 65 to 75% of the load as stated in the video?

[jimmac56]

@sjkoerner because metal stretches

[sjkoerner]

Why would the top 2 threads have to carry 65 to 75% of the load as stated in the video?