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Via Rivets To Fit 0.8mm Hole

Via Rivets To Fit 0.8mm Hole

2013-03-20 by James

Hi all, I would like to use some via rivets, thing is, I want to use
them in a 0.8mm drill hole.

I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
but they turn out to be closer to 0.9mm outer diameter and are not going
to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
I'd really rather stick with 0.8mm holes.

Search hard as I can, high, and low, ebay, taobao, alibaba.... I just
can not find anything smaller than 0.8mm, apart from... this old thread:
http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/24987
where indeed megauk sells rivets suitable for that drill size.
Unfortunately, megauk wants to charge me 30 pounds to post them to me,
30 pounds shipping, for a bag of rivets which probably weigh less than
10 grams

So, does anybody know of any other sources for rivets which will fit in
a 0.8mm hole?






[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-20 by Boman33

The rivets look nice in the picture but they are the wrong type if you want
a long-term reliable product. See an old post below:

Bertho



The problem with the eyelets was that they were tubular rivets. They solder
on the bottom and filled with solder. Unfortunately often the solder did not
flow
over the top edge to reliably join the top trace.

That is why they were changed to rivets that had a slit in them and not
tightly
crimped on the top . That way the solder wicked up and spread onto the top
trace.
Bertho
- - - - - - - - - - -
From: Bob Macklin Sent: Wednesday, January 02, 2013 19:41
I was an EE for over 40 years. And I remember the brass eyelet problem well.

But I think trying to simulate plated through holes on home made PCB is
going way too far.

I have been using wirewrap wire to fake the vias. I know you cannot put them
under components.

On real PCBs the plated though holds are made on each layer before etching.
Then the boards are sandwiched together.

This is just too much to try on homemade PCBs.

The sensitizing solution can be purchased and you can make real plated
through holes if you really need them.

But that's too much trouble for me. I only use the TT process to make small
quantities of boards for ham radio projects.

Bob Macklin
--------------------------------------------------





From: James Sent: Wednesday, March 20, 2013 07:44



Hi all, I would like to use some via rivets, thing is, I want to use
them in a 0.8mm drill hole.

I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
but they turn out to be closer to 0.9mm outer diameter and are not going
to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
I'd really rather stick with 0.8mm holes.

Search hard as I can, high, and low, ebay, taobao, alibaba.... I just
can not find anything smaller than 0.8mm, apart from... this old thread:
http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/24987
where indeed megauk sells rivets suitable for that drill size.
Unfortunately, megauk wants to charge me 30 pounds to post them to me,
30 pounds shipping, for a bag of rivets which probably weigh less than
10 grams

So, does anybody know of any other sources for rivets which will fit in
a 0.8mm hole?






[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-20 by William Laakkonen

Well James,


I have to guess where on earth you are- but have you seen this?
http://www.circuitmedic.com/products/115-7000.shtml

When looking for a source and shipping is a factor, it would be helpful to
let the group know where you are located- to avoid irrelevant suggestions.

HTH and 73
Bill
N4BKT



Show quoted textHide quoted text
On Wed, Mar 20, 2013 at 7:44 AM, James <bitsyboffin@...> wrote:

> **
>
>
> Hi all, I would like to use some via rivets, thing is, I want to use
> them in a 0.8mm drill hole.
>
> I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
> but they turn out to be closer to 0.9mm outer diameter and are not going
> to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
> I'd really rather stick with 0.8mm holes.
>
> Search hard as I can, high, and low, ebay, taobao, alibaba.... I just
> can not find anything smaller than 0.8mm, apart from... this old thread:
> http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/24987
> where indeed megauk sells rivets suitable for that drill size.
> Unfortunately, megauk wants to charge me 30 pounds to post them to me,
> 30 pounds shipping, for a bag of rivets which probably weigh less than
> 10 grams
>
> So, does anybody know of any other sources for rivets which will fit in
> a 0.8mm hole?
>
> [Non-text portions of this message have been removed]
>
>
>


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-20 by William Laakkonen

Well now, the *price* is USD 49.95 for 100 pieces, the shipping is coming
at $100 - so perhaps you should consider inquiring with the supplier for an
alternate to the air - though in NZ there may be few options- but the price
is not insane- the cost is. There is a difference.

Good luck James- let us know if you find a solution- but at this rate it
seems you need to look local as any source will have to pass on freight
fees- to not do so would indeed be insane.

Cheers,
Bill

Show quoted textHide quoted text
On Wed, Mar 20, 2013 at 5:50 PM, James Sleeman <bitsyboffin@...>wrote:

> **
>
>
> William Laakkonen wrote:
> > I have to guess where on earth you are- but have you seen this?
> > http://www.circuitmedic.com/products/115-7000.shtml
> >
>
> I live in New Zealand.
>
> Thanks for your link, but the price is insane - for 100 Rivets $144 USD
> including shipping.
>
>
>


[Non-text portions of this message have been removed]

Re: Via Rivets To Fit 0.8mm Hole

2013-03-20 by tda7000

Can you not just enlarge the holes or drill at 0.9mm to start with?

If your tolerances are that tight that it MUST be 0.8mm, then I think the rivets will not be the biggest of your worries.

If you just don't have any 0.9mm bits, get some. It's going to be cheaper than buying rivets the right size with huge shipping costs.


Show quoted textHide quoted text
--- In Homebrew_PCBs@yahoogroups.com, James <bitsyboffin@...> wrote:
>
> Hi all, I would like to use some via rivets, thing is, I want to use
> them in a 0.8mm drill hole.
>
> I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
> but they turn out to be closer to 0.9mm outer diameter and are not going
> to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
> I'd really rather stick with 0.8mm holes.
>
> Search hard as I can, high, and low, ebay, taobao, alibaba.... I just
> can not find anything smaller than 0.8mm, apart from... this old thread:
> http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/24987
> where indeed megauk sells rivets suitable for that drill size.
> Unfortunately, megauk wants to charge me 30 pounds to post them to me,
> 30 pounds shipping, for a bag of rivets which probably weigh less than
> 10 grams
>
> So, does anybody know of any other sources for rivets which will fit in
> a 0.8mm hole?
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-20 by James Sleeman

William Laakkonen wrote:
> Well now, the *price* is USD 49.95 for 100 pieces,
About 10 times more costly than megauk.

Show quoted textHide quoted text
> seems you need to look local as any source will have to pass on freight
> fees- to not do so would indeed be insane.
>
I have no problem paying reasonable shipping, I purchase all manner of
items from overseas every week, for very reasonable shipping costs.
Fwiw, USPS 1st Class International Package would get it here for well
under $10USD, by that company only using Fedex/UPS, their international
shipping prices are over 10 times higher.

Again thanks for the link though.

Re: Via Rivets To Fit 0.8mm Hole

2013-03-20 by tda7000

I don't know how China does it but their postal service is pretty good. Everything I buy on eBay is 'free' shipping or close to it. Even if it's included in the product price, it's still cheaper than everyone else.

Only takes 2 weeks to get here (usually), which is hardly much longer than most of the more expensive methods anyway.

Show quoted textHide quoted text
--- In Homebrew_PCBs@yahoogroups.com, James Sleeman <bitsyboffin@...> wrote:
>
> William Laakkonen wrote:
> > Well now, the *price* is USD 49.95 for 100 pieces,
> About 10 times more costly than megauk.
>
> > seems you need to look local as any source will have to pass on freight
> > fees- to not do so would indeed be insane.
> >
> I have no problem paying reasonable shipping, I purchase all manner of
> items from overseas every week, for very reasonable shipping costs.
> Fwiw, USPS 1st Class International Package would get it here for well
> under $10USD, by that company only using Fedex/UPS, their international
> shipping prices are over 10 times higher.
>
> Again thanks for the link though.
>

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-20 by Corona Sensei

On 21/03/2013 9:49 AM, James Sleeman wrote:
>
> William Laakkonen wrote:
> > Well now, the *price* is USD 49.95 for 100 pieces,
> About 10 times more costly than megauk.
>
> > seems you need to look local as any source will have to pass on freight
> > fees- to not do so would indeed be insane.
> >
> I have no problem paying reasonable shipping, I purchase all manner of
> items from overseas every week, for very reasonable shipping costs.
> Fwiw, USPS 1st Class International Package would get it here for well
> under $10USD, by that company only using Fedex/UPS, their international
> shipping prices are over 10 times higher.
>
> Again thanks for the link though.
>
Someone like this may help:
http://www.ship2anywhereusa.com/pricing/
I haven't used them myself, but have kept their link in my bookmarks for
things like this where I'd like to purchase something but the seller
doesn't have decent shipping arrangements (I'm in Australia).

Andrew


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-03-20 by James Sleeman

tda7000 wrote:
>
>
> Can you not just enlarge the holes or drill at 0.9mm to start with?
>

If it turns out that is the only economic choice [and it looks like it
is so far], then yes. I just prefer to standardise hole sizes where
possible, and I use 0.8mm normally.

That said, I have found another 0.8mm supply on taobao, chances are
probably the same closer-to-0.9mm ones, but I'll maybe grab a couple
hundred in my next order and see anyway, probably $3 or $4 USD.

Re: Via Rivets To Fit 0.8mm Hole

2013-03-20 by eliocor1

I use rivets made by Bungard and I buy them from Watterott:
http://www.watterott.com/en/Bungard
the price for 0.8mm (1000 pieces) is 19.04 Euros (20% VAT included)

http://www.watterott.com/index.php?page=product&info=417

They are rather precise.

Unfortunately shipping to NZ (via DHL) is rather expensive: 50 Euros

_ Elio.


Show quoted textHide quoted text
--- In Homebrew_PCBs@yahoogroups.com, James <bitsyboffin@...> wrote:
>
> Hi all, I would like to use some via rivets, thing is, I want to use
> them in a 0.8mm drill hole.
>
> I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
> but they turn out to be closer to 0.9mm outer diameter and are not going
> to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
> I'd really rather stick with 0.8mm holes.
>
> Search hard as I can, high, and low, ebay, taobao, alibaba.... I just
> can not find anything smaller than 0.8mm, apart from... this old thread:
> http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/24987
> where indeed megauk sells rivets suitable for that drill size.
> Unfortunately, megauk wants to charge me 30 pounds to post them to me,
> 30 pounds shipping, for a bag of rivets which probably weigh less than
> 10 grams
>
> So, does anybody know of any other sources for rivets which will fit in
> a 0.8mm hole?
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by Paul

Have you considered copper wire instead of rivets? Less expensive and work
just as well.

de Paul, W8AEF

-----Original Message-----
From: James Sleeman
Sent: Wednesday, March 20, 2013 2:50 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

William Laakkonen wrote:
> I have to guess where on earth you are- but have you seen this?
> http://www.circuitmedic.com/products/115-7000.shtml
>

I live in New Zealand.

Thanks for your link, but the price is insane - for 100 Rivets $144 USD
including shipping.

Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-03-21 by James

On 21/03/13 12:13, eliocor1 wrote:
>
> http://www.watterott.com/index.php?page=product&info=417
> the price for 0.8mm (1000 pieces) is 19.04 Euros (20% VAT included)
>

Thanks for the link, that's a pretty good price actually, looks like
it's the same as the megauk ones but a bit cheaper, and maybe VAT would
be deducted for export too.

Since you've used them (what size?), how do you like them - do you use
the expensive tooling to set them?



Show quoted textHide quoted text
> Unfortunately shipping to NZ (via DHL) is rather expensive: 50 Euros
>

Bah, foiled again!

Maybe I'll email them and see if they can do better given they are such
a minuscule thing physically, doesn't hurt to ask I suppose.



[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by James

On 21/03/13 15:09, Paul wrote:
>
> Have you considered copper wire instead of rivets? Less expensive and
> work
> just as well.
>

Particularly I want to use rivets because I think I should be able to
apply (uv cure ink stuff) soldermask right over the top of them for a
very clean appearance, and I think they will be easier to use under SMD
devices.

Also, because I like to try new things.

Now thanks to the previous poster I know that these things are made by
Bungard, searching for that is turning up more hits, I found this blog
using 0.6mm ones..
http://amphibiousthoughts.com/blog/micro-rivets-for-soldering


[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by Boman33

Note that what you are proposing was a cause of reliability problems with
rivets in the early days of PCB manufacturing. You are even making it worse
with the soldermask.



As you are using them there is only a mechanical connection with the top
runner even after soldering. After temperature cycling, vibration, and so
on some rivets become intermittent.

The industrial solution was to change to split rivets. They look ugly but
solder wicks up the center and through the split leaks out onto the top
copper trace so it forms a reliable solder junction.

I used to work for Motorola and saw the problem and the solution first hand.



Without the soldermask the regular rivets can be soldered to the top trace
as a secondary operation.

Bertho



From: James Sent: Wednesday, March 20, 2013 23:27



Particularly I want to use rivets because I think I should be able to
apply (uv cure ink stuff) soldermask right over the top of them for a
very clean appearance, and I think they will be easier to use under SMD
devices.

Also, because I like to try new things.

Now thanks to the previous poster I know that these things are made by
Bungard, searching for that is turning up more hits, I found this blog
using 0.6mm ones..
http://amphibiousthoughts.com/blog/micro-rivets-for-soldering






[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by James

On 21/03/13 18:52, Boman33 wrote:
> Without the soldermask the regular rivets can be soldered to the top trace
> as a secondary operation.

It was my intention to solder both sides after setting the rivet from
both sides (the ring should be fractionally wider than the rivet head
to allow solder adherance), then paint the mask over the top.

I don't know what you mean by a split rivet, could you perhaps make a
sketch of one, having trouble imagining how it is different to a
standard hollow rivet?

RE: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by Boman33

If you are going to solder them on the top you will be OK. It is actually
not a solder mask that you are referring to then since it is supposed to
limit solder flow. I guess you are referring to an overlay?

You only need to set the rivets from one side there is a matching anvil on
the opposing side.



The split rivets looks similar to regular rivets except they have a
length-wise slit in them vertically. They are also not crimped tight on the
top so they look ugly. During wave soldering flux and solder will wick up
the center of the eyelet and leak out onto the top copper trace through the
slit and spread under the top section of the rivet to form a reliable solder
joint.

Bertho



From: James Sent: Thursday, March 21, 2013 01:59



Show quoted textHide quoted text
On 21/03/13 18:52, Boman33 wrote:
> Without the soldermask the regular rivets can be soldered to the top trace
> as a secondary operation.

It was my intention to solder both sides after setting the rivet from
both sides (the ring should be fractionally wider than the rivet head
to allow solder adherance), then paint the mask over the top.

I don't know what you mean by a split rivet, could you perhaps make a
sketch of one, having trouble imagining how it is different to a
standard hollow rivet?





[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by James

On 21/03/13 19:27, Boman33 wrote:
> It is actually not a solder mask that you are referring to then since
> it is supposed to
>
> limit solder flow. I guess you are referring to an overlay?
>

The solder mask will be applied after riveting and soldering vias, but
before soldering the other components, it will limit flow on those fwiw,
but you're right, mostly for appearance.

Thanks for the description of the split rivets, I understand now, and
vaguely recall seeing something like that once.




[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by lists

In article <5149A104.4090006@...>,
James <bitsyboffin@...> wrote:
> I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
> but they turn out to be closer to 0.9mm outer diameter and are not going
> to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
> I'd really rather stick with 0.8mm holes.

Checking a few sources myself, I see at one seller, 0.8mm rivets
/internal/ size so this is probably the reason. You need to be sure
whether you are buyings rivets to fit an 0.8mm hole or rivets with an
0.8mm bore.

--
Stuart Winsor

Only plain text for emails
http://www.asciiribbon.org

Re: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-21 by James

On 21/03/13 22:48, lists wrote:
> Hmmm, to ship a 10g package to NZ would cost £3.30, £5.10 for 250g, using
>
> the 5 day, "airmail small packet" service.
>

Yes, Royal Mail is usually very cheap, and fast, I've often bought
things from the UK they are here in a week and for shipping prices
pretty comparable even to prices out of China.

Anyway, I've added some others advertised as 0.8mm from another mainland
China seller to my next Taobao order, for a few dollars it's worth a
gamble. Maybe I'll get lucky. Relying on Google's translation and
dubious pictures, it's sometimes hard to know exactly what one is buying
(or even if it's necessarily for sale!) until it arrives.




[Non-text portions of this message have been removed]

Re: Via Rivets To Fit 0.8mm Hole

2013-03-21 by eliocor1

--- In Homebrew_PCBs@yahoogroups.com, James <bitsyboffin@...> wrote:
> Thanks for the link, that's a pretty good price actually, looks like
> it's the same as the megauk ones but a bit cheaper, and maybe VAT would be deducted for export too.

correct.


> Since you've used them (what size?), how do you like them - do you use the expensive tooling to set them?

I use the 0.4/0.6, 0.6/0.8 and 0.8/1.0mm ones, but my preferred ones (for my high density SMD PCBs) are the 0.4/0.6mm rivets which are used with outer pad diameter vias of 1.01mm (40mils)

Please take care that those 0.4/0.6 rivets are really small and they are not so easy to handle, even with excellent tweezers like Lindstrom ones!

I do not use the rivet press: it is outrageously expensive!
I was thinking to create a small riveting press using broken tungsten carbide drills grinded with diamond wheels to emulate Bungard's ones:

see video and press bits on Bungard's web page:
<http://www.bungard.de/index.php?option=com_content&view=article&id=48%3Adurchkontaktierungspresse&catid=3%3Abungard-produkte&Itemid=65&lang=english>

<http://www.bungard.de/index.php?option=com_content&view=article&id=28%3Adurchkontaktier-nieten&catid=3%3Abungard-produkte&Itemid=79&lang=english>


. ciao
_ Elio.

RE: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole

2013-03-23 by Paul

Hi,



You may have found what you are looking for already, but I have a site that
sells many sizes of eyelets, see below, you may find what you need. Hope
this helps.



http://www.soldertools.net/search.php?search_query=eyelet



Paul :-) :-)



_____

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of James
Sent: Wednesday, March 20, 2013 7:44 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Via Rivets To Fit 0.8mm Hole





Hi all, I would like to use some via rivets, thing is, I want to use
them in a 0.8mm drill hole.

I purchased a few (from a Taobao seller) which were advertised as 0.8mm,
but they turn out to be closer to 0.9mm outer diameter and are not going
to fit (I tried, I did get one to jam in, just, but it wasn't easy!),
I'd really rather stick with 0.8mm holes.

Search hard as I can, high, and low, ebay, taobao, alibaba.... I just
can not find anything smaller than 0.8mm, apart from... this old thread:
http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/24987
where indeed megauk sells rivets suitable for that drill size.
Unfortunately, megauk wants to charge me 30 pounds to post them to me,
30 pounds shipping, for a bag of rivets which probably weigh less than
10 grams

So, does anybody know of any other sources for rivets which will fit in
a 0.8mm hole?

[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]

Re: Via Rivets To Fit 0.8mm Hole

2013-03-25 by cunningfellow

>Paul wrote:
>
> You may have found what you are looking for
> already, but I have a site that sells many
> sizes of eyelets, see below, you may find
> what you need. Hope this helps.
>
> http://www.soldertools.net/search.php?search_query=eyelet
>

There is a Japanese site selling a version
of the old Multicore Copperset through hole
system.

I found it 6 month ago but can not find it now.

Does anyone have a link?

They are little copper bails filled with solder
that have score marks around the outside at
a little bit over 1.6mm. You insert a bail
in your hole. Snap it off. Then squish it
with an automatic punch.

Unlike some of the other eyelet systems they
are a hole you can solder a leaded component
in. They are also 100% flush with the PCB
so you can put them under surface mount ICs
without a problem.

Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-04-08 by James

Just an update on this, I receieved the second batch of rivets I ordered
from a Taobao seller, and surprisingly they fit my 0.8mm holes perfectly.

The price, roughly (part of a larger order) $1.18 US per hundred,
including shipping.

Now I just have to think of how to set the back side of the rivets cleanly.

Re: Via Rivets To Fit 0.8mm Hole

2013-04-08 by David Halbakken

Maybe I missed it, but can you give a URL (again?) to the Taobao seller?

Show quoted textHide quoted text
--- In Homebrew_PCBs@yahoogroups.com, James <bitsyboffin@...> wrote:
>
> Just an update on this, I receieved the second batch of rivets I ordered
> from a Taobao seller, and surprisingly they fit my 0.8mm holes perfectly.
>
> The price, roughly (part of a larger order) $1.18 US per hundred,
> including shipping.
>
> Now I just have to think of how to set the back side of the rivets cleanly.
>

Re: Via Rivets To Fit 0.8mm Hole

2013-04-08 by Stefano Cillo_cillino25@yahoo.it

Hi,
could you please give the link for the rivets you mean?
I searched for them in Taobao but it wasn't so easy to navigate.

Thanks

Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-04-08 by James

On 09/04/13 08:43, Stefano Cillo_cillino25@... wrote:
> could you please give the link for the rivets you mean?
> I searched for them in Taobao but it wasn't so easy to navigate.
>

These are the ones which were 0.8mm external diameter
http://item.taobao.com/item.htm?id=3910579161&spm=2014.12328642.0.0
( all items that this seller has:
http://pcb1.taobao.com/search.htm?spm=a1z10.1.w615647138.1.cPuiVP )

TIP: When using *.taobao.com sites, use Chrome and it will do a
reasonable job of auto translation, couple of notes, "Baby" means Item,
all prices on taobao.com are shown are CNY (yuan), sometimes google
changes the � symbol into $ during translation, but the price is still CNY.

If you buy from Taobao, you will need to use a buying agent, I would
recommend Bhiner.com for this purpose they have the best system. You
should expect to pay about $10 USD extra on the order for china shipping
and agent fees, and then whatever the international shipping is.
Bhiner's system shows the item prices to you converted to USD by default
(you can change at the top of the screen). It's a good idea to have a
look at the other things the same seller has to see if there is anything
else you'd like in the same order, it amortizes the domestic shipping
cost (seller to agent shipping), but remember to think about how heavy
the order is for the international shipping!

On the right edge of the Bhiner site's pages is a Shipping Calculator
click that, then when it opens click "Small Packet (Only Below 2kg)" the
rivets weigh nearly nothing, looks like HKPOST SMALL to Italy is only
about $3.65 USD for 100 grams.

I wrote a more in depth review/guide of Bhiner here:
http://dangerousprototypes.com/forum/viewtopic.php?p=51351#p51351
check the rest of that thread for other agent experiences.




[Non-text portions of this message have been removed]

Re: Via Rivets To Fit 0.8mm Hole

2013-04-09 by David Halbakken

James, what tool are you using to peen the rivets? I did not notice any tools specifically for that purpose on the taobao site.

Show quoted textHide quoted text
--- In Homebrew_PCBs@yahoogroups.com, James <bitsyboffin@...> wrote:
>
> On 09/04/13 08:43, Stefano Cillo_cillino25@... wrote:
> > could you please give the link for the rivets you mean?
> > I searched for them in Taobao but it wasn't so easy to navigate.
> >
>
> These are the ones which were 0.8mm external diameter
> http://item.taobao.com/item.htm?id=3910579161&spm=2014.12328642.0.0

RE: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-04-09 by Boman33

Look for (google) "automatic center punch". It is a center punch that looks
like an overgrown ballpoint pen. You just push on it and it will snap. The
force can be adjusted.

Bertho



From: David Halbakken Sent: Monday, April 08, 2013 21:32



James, what tool are you using to peen the rivets? I did not notice any
tools specifically for that purpose on the taobao site.






[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-04-09 by James

On 09/04/13 13:32, David Halbakken wrote:
Show quoted textHide quoted text
>
> James, what tool are you using to peen the rivets? I did not notice
> any tools specifically for that purpose on the taobao site.
>

No idea as yet :) I may just try using my drill press with a slightly
pointed punch in it.


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-04-13 by James

On 09/04/13 13:32, David Halbakken wrote:
>
> James, what tool are you using to peen the rivets? I did not notice
> any tools specifically for that purpose on the taobao site.
>

I did some testing with "peening" the rivets tonight, I got the best
results by inserting from the "presentation" side, then using a very
sharp fine point (I ground a point on a 1mm or so rod, but just a
drawing pin would work) on the bottom of the rivet to enlarge the hole
slightly (insert point and a couple of light taps, or just work in a
circular motion by hand), then pressing it using a 10mm flat ended rod
chucked in my drill press.

Enlarging the hole on the bottom side makes them press more evenly,
otherwise they tend to collapse to one side or split to both sides
causing the bottom to press out quite far in at least one direction.

I tried making a spike-and-press tool in one (a very fine and short
point in the center of the end of 10mm rod diameter something like
http://www.flickr.com/photos/93638530@N08/8643991549/in/photostream )
but I was unsuccessful in constructing it with my grinder, if I could
construct it, I think that would work well in a drill press. I've
thought that maybe there is some other way to make it. Grind a point on
the end of an old 0.8mm drill shaft, drill a 0.8mm hole in the end of
the 10mm rod, insert the pointed shaft with some epoxy to the right
depth. Still much easier said than done drilling 0.8mm hole into a
steel rod. Might work though...

Anyway, I'm thinking to tin the via pads, put some flux on the rivet,
insert and peen rivet, then apply the iron to heat the rivet and the
solder under it to ensure a long lasting connection.


[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] Re: Via Rivets To Fit 0.8mm Hole

2013-04-13 by Boman33

You might try a broken carbide PCB drillbit. It has a built-in flair.



You should also be able to solder directly without pre-tinning and
pre-fluxing the rivet, flux never hurts, add a very small amount of solder.

Bertho



From: James Sent: Saturday, April 13, 2013 03:57



Show quoted textHide quoted text
On 09/04/13 13:32, David Halbakken wrote:
>
> James, what tool are you using to peen the rivets? I did not notice
> any tools specifically for that purpose on the taobao site.
>

I did some testing with "peening" the rivets tonight, I got the best
results by inserting from the "presentation" side, then using a very
sharp fine point (I ground a point on a 1mm or so rod, but just a
drawing pin would work) on the bottom of the rivet to enlarge the hole
slightly (insert point and a couple of light taps, or just work in a
circular motion by hand), then pressing it using a 10mm flat ended rod
chucked in my drill press.

Enlarging the hole on the bottom side makes them press more evenly,
otherwise they tend to collapse to one side or split to both sides
causing the bottom to press out quite far in at least one direction.

I tried making a spike-and-press tool in one (a very fine and short
point in the center of the end of 10mm rod diameter something like
http://www.flickr.com/photos/93638530@N08/8643991549/in/photostream )
but I was unsuccessful in constructing it with my grinder, if I could
construct it, I think that would work well in a drill press. I've
thought that maybe there is some other way to make it. Grind a point on
the end of an old 0.8mm drill shaft, drill a 0.8mm hole in the end of
the 10mm rod, insert the pointed shaft with some epoxy to the right
depth. Still much easier said than done drilling 0.8mm hole into a
steel rod. Might work though...

Anyway, I'm thinking to tin the via pads, put some flux on the rivet,
insert and peen rivet, then apply the iron to heat the rivet and the
solder under it to ensure a long lasting connection.






[Non-text portions of this message have been removed]

Re: Via Rivets To Fit 0.8mm Hole

2013-04-13 by g3oou@...

Hi All

I use a slightly larger eyelet - Tucker L762 - to make through hole
connections that have sufficient clearance in the centre hole for a component
lead. I use centre punches to expand both ends without flattening them
completely down onto the PCB surface. This makes a good solder joint to the PCB
and the component lead.

Regards

Bob

Bob F Burns G3OOU
C Eng, FIET, MSE
G-QRP 6907
Secretary of Crystal Palace Radio & Electronics Club: www.g3oou.co.uk
Technical web site: www.qsl.net/g3oou
@BobFBurns on Twitter: http://twitter.com/BobFBurns

[Non-text portions of this message have been removed]

Re: Via Rivets To Fit 0.8mm Hole

2013-04-14 by Jim

Transfer punches have a tip shaped like you describe.

Show quoted textHide quoted text
--- In Homebrew_PCBs@yahoogroups.com, James <bitsyboffin@...> wrote:
>
> On 09/04/13 13:32, David Halbakken wrote:
> >
> > James, what tool are you using to peen the rivets? I did not notice
> > any tools specifically for that purpose on the taobao site.
> >
>
> I did some testing with "peening" the rivets tonight, I got the best
> results by inserting from the "presentation" side, then using a very
> sharp fine point (I ground a point on a 1mm or so rod, but just a
> drawing pin would work) on the bottom of the rivet to enlarge the hole
> slightly (insert point and a couple of light taps, or just work in a
> circular motion by hand), then pressing it using a 10mm flat ended rod
> chucked in my drill press.
>
> Enlarging the hole on the bottom side makes them press more evenly,
> otherwise they tend to collapse to one side or split to both sides
> causing the bottom to press out quite far in at least one direction.
>
> I tried making a spike-and-press tool in one (a very fine and short
> point in the center of the end of 10mm rod diameter something like
> http://www.flickr.com/photos/93638530@N08/8643991549/in/photostream )
> but I was unsuccessful in constructing it with my grinder, if I could
> construct it, I think that would work well in a drill press. I've
> thought that maybe there is some other way to make it. Grind a point on
> the end of an old 0.8mm drill shaft, drill a 0.8mm hole in the end of
> the 10mm rod, insert the pointed shaft with some epoxy to the right
> depth. Still much easier said than done drilling 0.8mm hole into a
> steel rod. Might work though...
>
> Anyway, I'm thinking to tin the via pads, put some flux on the rivet,
> insert and peen rivet, then apply the iron to heat the rivet and the
> solder under it to ensure a long lasting connection.
>
>
> [Non-text portions of this message have been removed]
>