Rivnut fitters in North Nottinghamshire??

"Stewart" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I have a titanium framed bike and one of the bottle bosses has come loose,
rotating in the frame. I believe this to be a rivnut, as shown at
http://www.beewee.co.uk/robsbriefings-1-1.pdf Searching on Google for a
bike
shop to replace it has been unhelpful.

Does anyone know of a bike shop in North Notts or reasonably close by that
could
fit a new one for me?

It may also help if you search for nutserts as these items are commonly
known as.

We use them extensively in panel building, unfortunately not in your area.
It may be worth enquiring at a local panel builders .

MJP

Stewart said:

I have a titanium framed bike and one of the bottle bosses has come loose,
rotating in the frame. I believe this to be a rivnut, as shown at
http://www.beewee.co.uk/robsbriefings-1-1.pdf Searching on Google for a bike
shop to replace it has been unhelpful.

Does anyone know of a bike shop in North Notts or reasonably close
by that could fit a new one for me?

Do you still have the one that was in there? Can you just bond it
back into the frame using some JB Weld?

Chris
--
Chris Eilbeck

Stewart said:

I have a titanium framed bike and one of the bottle bosses has come loose,
rotating in the frame. I believe this to be a rivnut, as shown at
http://www.beewee.co.uk/robsbriefings-1-1.pdf Searching on Google for a bike
shop to replace it has been unhelpful.

Does anyone know of a bike shop in North Notts or reasonably close by that could
fit a new one for me?

If you can still get a bolt in and out:
Screw in a m5 bolt with a washer and a nut. (bolt-nut-washer-rivnut)

Hold the bolt and tighten down the nut. This will compress the rivnut again

/Marten

On Sat, 12 May 2007 18:39:25 +0100, Chris Eilbeck <[email hidden]>

Quoted message said:

Do you still have the one that was in there? Can you just bond it
back into the frame using some JB Weld?

Chris

Unfortunately, the thread has stripped following other advice on the web about
how to re-crimp it :-{

MJP said:

Quoted message said:

It may also help if you search for nutserts as these items are commonly
known as.

We use them extensively in panel building, unfortunately not in your area.
It may be worth enquiring at a local panel builders .

Thanks for that. Searching for Nutserts has produced far more UK Google hits.

Stewart said:

On Sat, 12 May 2007 18:39:25 +0100, Chris Eilbeck <[email hidden]>

Quoted message said:

Do you still have the one that was in there? Can you just bond it
back into the frame using some JB Weld?

Chris

Unfortunately, the thread has stripped following other advice on the web about
how to re-crimp it :-{

Oh dear, when removing the insert, it is best to ensure no delicate
souls are within hearing distance 😉

--
/Marten

info(apestaartje)m-gineering(punt)nl

On Sat, 12 May 2007 19:52:35 +0200, M-gineering <[email hidden]>

Quoted message said:

If you can still get a bolt in and out:
Screw in a m5 bolt with a washer and a nut. (bolt-nut-washer-rivnut)

Hold the bolt and tighten down the nut. This will compress the rivnut again

/Marten

Thanks Marten, but I tried this and with very little force I stripped the
thread. It had an alloy hex nut in it that had corroded, so I struggled to get
that out without breaking it.

"Stewart" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I have a titanium framed bike and one of the bottle bosses has come loose,
rotating in the frame. I believe this to be a rivnut, as shown at
http://www.beewee.co.uk/robsbriefings-1-1.pdf Searching on Google for a
bike
shop to replace it has been unhelpful.

Does anyone know of a bike shop in North Notts or reasonably close by that
could
fit a new one for me?

You may not want to hear this .... but you can buy a Rivnut tool for about
£20 (usually on eBay) - mine is from Laser Tools at Southam, Warwicks (they
are importers but could give you a supplier)

RG (a.k.a. Rob's Briefings as mentioned above ... 15 minutes of fame!!)

Quoted message said:

Quoted message said:

I have a titanium framed bike and one of the bottle bosses has come loose,
rotating in the frame. I believe this to be a rivnut, as shown at

Falcon cycles are in Brigg, you could ask them.

RG' nochance said:

Quoted message said:

You may not want to hear this .... but you can buy a Rivnut tool for about
£20 (usually on eBay) - mine is from Laser Tools at Southam, Warwicks (they
are importers but could give you a supplier)

RG (a.k.a. Rob's Briefings as mentioned above ... 15 minutes of fame!!)

OK. I've found a Laser tool to do the job, complete with what I assume are the
correct rivets for the job... Now, anyone have an idea as to how to remove the
old rivnut without a piece of metal dropping into the frame and rattling for
ever more?

Stewart said:

RG' nochance said:

You may not want to hear this .... but you can buy a Rivnut tool for about
£20 (usually on eBay) - mine is from Laser Tools at Southam, Warwicks (they
are importers but could give you a supplier)

RG (a.k.a. Rob's Briefings as mentioned above ... 15 minutes of fame!!)

OK. I've found a Laser tool to do the job, complete with what I assume are the
correct rivets for the job... Now, anyone have an idea as to how to remove the
old rivnut without a piece of metal dropping into the frame and rattling for
ever more?

Doesn't the bottom end of the tube open into the bottom bearing shell?
I'm sure mine does.

Al C-F said:

Quoted message said:

Doesn't the bottom end of the tube open into the bottom bearing shell?
I'm sure mine does.

On mine it doesn't 'open' into the BB shell, there is only a +/- 3mm hole. More
a pressure relief hole for welding during manufacture, I'd guess. I've had the
BB out this weekend to see. Still, I guess it may be easier to open this hole a
little and shake the piece out than to extract the rivet through a hole half way
up the bottom frame tube. There is a weld all the way round the BBshell where
it meets the frame so I surmise that opening the hole to say 6-8mm will not
weaken the frame in any way.

I have heard of jammed aluminium seatposts being removed from titanium frames by
filling with concentrated Caustic Soda (Sodium Hydroxide) and waiting for the
aluminium to dissolve. Does this seems a little drastic for a rivet, though?

Stewart wrote on 13/05/2007 20:16 +0100:

Quoted message said:

On mine it doesn't 'open' into the BB shell, there is only a +/- 3mm
hole. More a pressure relief hole for welding during manufacture,
I'd guess. I've had the BB out this weekend to see. Still, I guess
it may be easier to open this hole a little and shake the piece out
than to extract the rivet through a hole half way up the bottom frame
tube. There is a weld all the way round the BBshell where it meets
the frame so I surmise that opening the hole to say 6-8mm will not
weaken the frame in any way.

You could check at the other end too where it joins the head tube.

--
Tony

"The most savage controversies are those about matters as to which there
is no good evidence either way."
- Bertrand Russell

Stewart said:

Al C-F said:

Doesn't the bottom end of the tube open into the bottom bearing shell?
I'm sure mine does.

On mine it doesn't 'open' into the BB shell, there is only a +/- 3mm hole. More
a pressure relief hole for welding during manufacture, I'd guess. I've had the
BB out this weekend to see. Still, I guess it may be easier to open this hole a
little and shake the piece out than to extract sthe rivet through a hole half way
up the bottom frame tube. There is a weld all the way round the BBshell where
it meets the frame so I surmise that opening the hole to say 6-8mm will not
weaken the frame in any way.

I have heard of jammed aluminium seatposts being removed from titanium frames by
filling with concentrated Caustic Soda (Sodium Hydroxide) and waiting for the
aluminium to dissolve. Does this seems a little drastic for a rivet, though?

Why not squeeze a bit of grease in through the hole? The rivet will
still be in there but it will stick to the grease, which will stop it
rattling.

I just wanted to thank everyone for the helpful advice. I now have a
Rivnut/Nutsert tool from eBay for £20 and I have also managed to extract the old
rivet in two pieces, leaving the frame completely undamaged. Job done!

:-)