Neil,
What do you think of Cherry Q rivets?
http://www.aircraftspruce.com/menus/ha/rivets.html
Jim in Palmdale
----- Original Message -----
From: "Neil Albaugh" <neil@dbelltech.com>
To: "'3 liter'" <saltfever@comcast.net>; "'land-speed submit'"
<land-speed@autox.team.net>
Sent: Thursday, January 18, 2007 4:03 PM
Subject: Pop Rivet Rant (part 2)
> ...second part...
>
> The Achilles heel of pop rivets is their lack of mandrel retention. The
> majority of their shear strength is derived from the mandrel stub that
> remains in the rivet after the stem (mandrel) breaks off. Ordinary pop
> rivets will allow the mandrel to fall out under vibration and this
> seriously
> weakens its shear strength. (Never depend on a rivet for anything but
> shear
> applications.)
>
> A more advanced variation is the AVEX rivet; it retains the mandrel fairly
> well and allows a larger grip range than ordinary. These are "semi-
> structural" rivets, made with an aluminum rivet body and a steel mandrel.
> They work well and are not too expensive.
>
> True structural blind rivets are very expensive but also very reliable. An
> example of this type is the CherryMAX rivet. Similar ones are also made by
> Huck and All-Fast. These rivets are made for high vibration and have a
> positively- locked mandrel. You can find them on eBay sometimes
> (aluminum/aluminum, aluminum/steel, titanium, or Monel) but be aware that
> some are made for repair service and those are "oversize"; made to fit in
> a
> hole drilled larger after the original rivet is removed. The downside of
> these very nice rivets is that they require a special pulling tool;
> ordinary
> pop rivet pullers won't lock the mandrels in place reliably.
>
> I hope this helps clear up some questions about pop rivets.
>
> Regards, Neil Tucson, AZ
|