Hi David
Yes, allows the use of the original screw, so whatever is fastening to
it doesn't have to be modified.
Procedure is to drill and tap oversized, and install a helicoil -
essentially a coil of square wire, wound up like a spring. The wire
engages in the new threads and is sized so that the original screw
threads inside it.
Graham Collins
Secret Plans
C&C 35-III #11
On 2020-05-14 10:50 p.m., David Knecht via CnC-List wrote:
I have seen mention of helicoils several times on this list but I have
no experience with them. I have several stripped screws on my Harken
furler and was thinking they might be useful to repair. What is
unclear to me from what I have read is the reason to use them. I
still have threads there, and I thought the idea was to screw in a
helicoil to make the threads grab again. However, every description I
have seen of using them drills out the hole, taps and then screws in a
helicoil. I don’t get the point. If I am going to drill and tap, why
would I use a helicoil instead of just putting a screw into the newly
tapped hole? Is it that you can use the same size screw as before
instead of going to a larger size? Is that preferable for some
reason? Dave
David Knecht
S/V Aries
1990 C&C 34+
New London, CT
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every one is greatly appreciated. If you want to support the list - use PayPal
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