[NSRCA-discussion] Vibration Dampening mounts

[Jay Marshall]

I've successfully used the well nuts (blind rivets) to attach motor mounts
to the firewall. Work great and much easier than captive nuts. Piedmont
models used to have an app note on their web site with the ordering info. 

 

Jay Marshall 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Pavlick
Sent: Friday, May 23, 2008 10:54 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Vibration Dampening mounts

 

Jim,

 What you're looking for is commonly known as an "isolation" mount. Take a
look here:

http://www.rubber-group.com/isolationmounts.html

I don't know what their minimum quantity requirement is but it looks like
they have just about any size. Let me know if you have any success with
them.

 

For pipe mounting I've been using a different type of mount lately. It's
called a "well nut" or "rivet nut":

 <http://www.mcmaster.com/nav/enter.asp?pagenum=3214>
http://www.mcmaster.com/nav/enter.asp?pagenum=3214

It's a piece of threaded metal encapsulated in rubber. You drill a hole in
the hard-point, insert the well nut, attach your part to the well nut using
a screw and tighten the screw. The well nut swells up on the other side of
the attachment point and retains the part that you're fastening. It's self
locking and you can control the amount of isolation by how much you tighten
the screw. I've had iso-mounts fail (the two halves will separate) but the
well nuts hold up fine. I would suggest replacing them during your annual
maintenance though - I consider them a wear item like fuel tubing. You can
add nylon spacers of different thickness' between the well nut and the pipe
mount to align the pipe too.

 

John Pavlick 

"Woodward, Jim (US SSA)" <jim.woodward at baesystems.com> wrote:

Hi Guys,

I would like to purchase a rubber isolation mount like what is used on
the Dave Brown hush-clamp pipe mounts.

http://www.vibrationmounts.com/Store.asp?Page=Products1.htm here is a
link to what they look like. They have some various trade names. I'm
having trouble finding them with 6/32 threads, and available for sale.
McMaster Carr calls them "Vibration Dampening pads" but does not have a
small enough size. 

Does anyone have a reasonable source for these? I have found them to be
about $7.00 EACH from stores that published prices.

Thanks,
Jim W. 
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