How the LBS fixes rivnuts installed by wannabel bike mechanics

On Thursday, February 18, 2016 at 9:37:52 AM UTC-5, Andre Jute wrote:
TROLL BAIT (ONLY ON RBT -- ELSEWHERE CONSIDERED USEFUL INFORMATION):
http://www.artscyclery.com/learningc...tlebosses.html

https://goo.gl/fAYVhl

not tried, we use epoxy (THWI)

butbutbut drill small hole in riv flange using appropriate drill

place sharp pick solidly in hole n tubing indent made by drill

drill out rivnut.

Andre Jute...good link

try earplugs

think...generate wax.

On Thu, 18 Feb 2016 11:11:55 -0500, Frank Krygowski
wrote:

On 2/18/2016 10:53 AM, David Scheidt wrote:
jbeattie wrote:
:On Thursday, February 18, 2016 at 6:37:52 AM UTC-8, Andre Jute wrote:
: TROLL BAIT (ONLY ON RBT -- ELSEWHERE CONSIDERED USEFUL INFORMATION):
: http://www.artscyclery.com/learningc...tlebosses.html

:Still useful. I wonder what the method is for removing a rivnut without wallowing out the hole.

Least tooling intensive way is a series of drill bits, starting small,
and working up. When the inner part gets thin, it can be deformed and
removed or pushed through. If you do it a lot, there are specialized
cutters and fixtures to do it in fewer steps.

See
http://electricalequipment.tpub.com/...07-14_34_1.jpg

For a bike, that would rely on having the frame tube open at the bottom
(say, into the bottom bracket) so the body of the rivnut could be taken
out. I wouldn't want one rattling around inside a frame tube as I rode.

Most rivnuts are in either the down tube or the seat tube and
generally these two tubes are open ended at the bottom bracket so bits
will simply fall down into the B.B. and can be removed.
--
cheers,

John B.

On Thu, 18 Feb 2016 07:31:19 -0800 (PST), jbeattie
wrote:

On Thursday, February 18, 2016 at 6:37:52 AM UTC-8, Andre Jute wrote:
TROLL BAIT (ONLY ON RBT -- ELSEWHERE CONSIDERED USEFUL INFORMATION):
http://www.artscyclery.com/learningc...tlebosses.html

Still useful. I wonder what the method is for removing a rivnut without wallowing out the hole.

-- Jay Beattie.

It depends on the problem. If the rivnut is loose in the tube but
still has threads you can either use the method in the reference above
or the Park Tool method of a hub skewer and spacers and (hopefully)
tighten it up enough to either use it as is or drill it out using
graduated drill sizes as someone else suggested.

One thing to be aware of is that there are a number of "anti-turn"
rivnuts which will take a bit of fiddling to get out. A Demrel tool
and some small bits is very handy :-)

As an aside, a M5 rivnut is normally installed in a 7 mm round hole
but if you bugger up the hole a bit you might be able to install a
"hex shank", anti-turn rivnut which measures 7 mm across the flats or
there are, I believe, over sized rivnuts intended to repair "buggered"
holes. Also aluminum rivnuts are a bit larger - the hole size for a M5
aluminum rivnut is 7.5 mm hole.

Lastly, rivnuts are not all created equally in that they come in
different "grip lengths" and materials so some care should be taken in
obtaining a replacement rivnut.
--
cheers,

John B.

On 18/02/16 17:57, Jeff Liebermann wrote:
On Thu, 18 Feb 2016 07:31:19 -0800 (PST), jbeattie
wrote:

I wonder what the method is for removing a rivnut without wallowing out the hole.
-- Jay Beattie.

Use a button head rivet extractor like this:
http://www.northerntool.com/shop/tools/product_200451731_200451731
http://www.yardstore.com/browse.cfm/4,4332.html
https://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=1341S
http://www.browntool.com/Default.aspx?tabid=344&ProductID=154
These are very common among aviation mechanics, where the typical
general aviation flying machine is held together with blind rivets.

The basic idea is to keep the drill centered in the middle of the
rivet or rivnut using the head as a guide. As long as the head is not
mutilated, that should work. The rest is picking the correct size
drill bit. You're on your own for figuring out how to remove what's
left of the rivet and shavings from inside the frame.

Ooooh! Aircraft tools! Don't have an aircraft, but I don't see that as
any handicap fires up browser

:-)

On Friday, February 19, 2016 at 1:21:51 AM UTC-5, Tosspot wrote:
On 18/02/16 17:57, Jeff Liebermann wrote:
On Thu, 18 Feb 2016 07:31:19 -0800 (PST), jbeattie
wrote:

I wonder what the method is for removing a rivnut without wallowing out the hole.
-- Jay Beattie.

Use a button head rivet extractor like this:
http://www.northerntool.com/shop/tools/product_200451731_200451731
http://www.yardstore.com/browse.cfm/4,4332.html
https://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=1341S
http://www.browntool.com/Default.aspx?tabid=344&ProductID=154
These are very common among aviation mechanics, where the typical
general aviation flying machine is held together with blind rivets.

The basic idea is to keep the drill centered in the middle of the
rivet or rivnut using the head as a guide. As long as the head is not
mutilated, that should work. The rest is picking the correct size
drill bit. You're on your own for figuring out how to remove what's
left of the rivet and shavings from inside the frame.

Ooooh! Aircraft tools! Don't have an aircraft, but I don't see that as
any handicap fires up browser

:-)

Shimano produces aircraft tools

On 2/18/2016 10:21 PM, Tosspot wrote:
On 18/02/16 17:57, Jeff Liebermann wrote:
On Thu, 18 Feb 2016 07:31:19 -0800 (PST), jbeattie
wrote:

I wonder what the method is for removing a rivnut without wallowing
out the hole.
-- Jay Beattie.

Use a button head rivet extractor like this:
http://www.northerntool.com/shop/tools/product_200451731_200451731
http://www.yardstore.com/browse.cfm/4,4332.html
https://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=1341S
http://www.browntool.com/Default.aspx?tabid=344&ProductID=154
These are very common among aviation mechanics, where the typical
general aviation flying machine is held together with blind rivets.

The basic idea is to keep the drill centered in the middle of the
rivet or rivnut using the head as a guide. As long as the head is not
mutilated, that should work. The rest is picking the correct size
drill bit. You're on your own for figuring out how to remove what's
left of the rivet and shavings from inside the frame.

Ooooh! Aircraft tools! Don't have an aircraft, but I don't see that as
any handicap fires up browser

:-)

In the case of a loose Rivnut, how do you keep it from spinning as you
try to drill it?

On Fri, 19 Feb 2016 07:21:47 +0100, Tosspot
wrote:

Ooooh! Aircraft tools! Don't have an aircraft, but I don't see that as
any handicap fires up browser

Flying bicycles are old history:
https://www.google.com/search?q=bicycle+with+wings&tbm=isch
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Fri, 19 Feb 2016 13:17:31 -0800, sms
wrote:

In the case of a loose Rivnut, how do you keep it from spinning as you
try to drill it?

The end of the collet has teeth which keep the head from spinning.

https://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=1341S
"The serrated nosepiece fits over any button head, round head,
or universal head rivet and locks in place to keep it from
spinning as it's being drilled out."

See Pg 33 and note the teeth on the end of the collet:
https://www.alcoa.com/fastening_systems_and_rings/aerospace/catalog/pdf/specifications/AFSBlindFastenerProcess%20Manual.pdf

Mo
http://www.afsrhuck.net/us/files/Manuals/Cutters/Blind%20Rivet%20Removal%20(HK485).pdf


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558