Oliver,
Do they make HeliCoils in 8-32 size? I've never seen them in sizes
smaller than 1/4-20.
If it was mine, I'd tap it out to 10-32 if the threads were at all
shakey. It's just a bit larger, not enough to cause trouble, yet will
make for a significantly stronger thread. Install the setscrew with some
LocTite Threadlocker to keep it from falling out.
<<Jim>>
Carol and Oliver Filippi wrote:
>
> Don't forget the old Heli-Coil replacement threaded insert.
>
> The kits are not cheap (typically under $20.00) and include a special tap,
> insertion device and 10 or so threaded inserts [usually stainless steel])
> But you maintain the size of the original screw. This avoids the two wrongs
> to make a right syndrome.
>
> The repair is often better than the original, especially when threads are
> stripped in soft metal (aluminum, pot metal, zammac, brass, etc) as they are
> replaced with stainless steel.
>
> For those not familiar with this system, which is to repair the female
> threaded part. It works like this:
> You drill out the stripped threads (with the proper size drill) then using
> the special tap, cut threads for the threaded insert. Then you screw in the
> threaded insert with a special tool. The threaded insert looks like a small
> spring. In reality, the outside thread matches the special tap, and the
> inside thread matches the one that was stripped.
>
> Heli-Coil was the originator (like Thermos) and still makes them, although
> there are now other manufacturers. I am partial to Heli-Coil, but have used
> generic brands without any problems. These products come in both ANSI
> (American) NC and NF [National Coarse, and National Fine, and Metric as
> well]. Industrial fastener suppliers and auto parts suppliers typically
> carry them. Great product !
>
> Oliver Filippi
>
>
--
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<<lower SE Michigan, USA>>
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