Beginner Doubts

This topic has 17 replies, 8 voices, and was last updated 2 November 2012 at 14:53 by Armando Meneses.

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3 October 2011 at 18:22 #75760
Armando Meneses
Participant
@armandomeneses27262
Hello

In the frame I’m building, use different sizes of Revit.

When I bought the snaps, as I have not seen anything like doll, for example buy two snaps 1 / 8 “, one to hold the head has formed and the other to form the head opposite, in middle leaving the parts want to fix.

What happens is that the head of revit not equal with the concave hole of the snap. Someone help me?

Armando
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3 October 2011 at 18:22 #5683
Armando Meneses
Participant
@armandomeneses27262
3 October 2011 at 18:59 #75763
JasonB
Moderator
@jasonb
Can you confirm that the Snaps are 1/8″ and the rivits you are using are 1/8″

Can you say what country you are from as if not in the UK you may possibly have got 3mm rivits instead of 1/8″. In the UK all rivits should be made to the correct British Standard which sets out specific sizes for the head.

This chart shows the correct sizes

J
3 October 2011 at 19:28 #75764
Steambuff
Participant
@steambuff
Jason,

Thanks for that … tell’s me what I wanted to know as well (Setting allowance)

Dave
3 October 2011 at 19:32 #75765
JasonB
Moderator
@jasonb
Use it as a starting point, you may need a little more or a little less.

J
3 October 2011 at 19:32 #75766
Clive Hartland
Participant
@clivehartland94829
Rivets should be cut to a certain length for decent head forming.

Try some sample rivetting and adjust the length to see which is best.

Are you sure that you need a domed head on both sides as most of my rivetting is domed one side and hammered into a countersunk hole on the other?

Clive
4 October 2011 at 05:56 #75785
Springbok
Participant
@springbok
Hi Armando,

The dolly is just another snap the other side, I do not know what machirery you have but I tend to make my own dolly to suit the job in hand. If you have a mill fanrastic use a bit of scrap steel from scrap box and using a ball cutter make your dolly firmly fix into your large vice on bench. Arrand tools do a very decent rivet cutter also great for bolts, wel you name it. but you need a decent size vice. As jasonb says are your rivet metric or imperial would make a difference as you may get a not perfect dome. Would as suggested before get some scrap sheet and practise.

Please keep asking as we all start somewhere

Bob
4 October 2011 at 09:07 #75790
Terryd
Participant
@terryd72465
Hi Armando,

I hope that I’m not ‘teaching granny to suck eggs’ but are you ‘rough shaping’ the rivet before you use the snap (dolly or set)? The way to fit rivets is to first close the parts you are fixing,
then firmly tap the cut end of the rivet with the flat of the hammer to ‘spread’ it into the hole (fixes the parts together). Then roughly shape the new rivet head with the ‘ball peen’ of an
engineers hammer with light taps and then the second dolly is used to
give the final neat shape to the head.

There is a excellent article on riveting in ME 4412 (9-22 October) page 347 by Terence Holland explaining most of what you will need to know about using solid rivets (even making your own rivet snaps (dolly or set) If you don’t have access to the magazine send a private message and I can let you have a copy of the relevant page. To start you off I got this picture from Wikipedia, it might give you an idea of the process.

Hope this helps,

Regards

Terry

Edited By Terryd on 04/10/2011 09:08:38
4 October 2011 at 11:10 #75794
Armando Meneses
Participant
@armandomeneses27262
Hello.

Bought the rivets and snaps at Reeves. and my confusion is that I bought three sizes, none of the rivet head fits properly in the domes of the snaps. Thus I can not begin to practice making my first rebitsello.

The rivets are in imperial measurements.

Armando
4 October 2011 at 11:19 #75795
Armando Meneses
Participant
@armandomeneses27262
JasonB, I‘m from Portugal.

Armando
7 October 2011 at 11:26 #75940
Armando Meneses
Participant
@armandomeneses27262
Hello.

Yesterday measure the rivet 1 / 8 that I bought.
The head diameter measures 7 / 32 and the diameter of Shank measures 1 / 8.
If I put the head of the snap dome is big, if I put the dome on the shank, the shank is a little smaller (enters the dome).

Sorry I keep pushing this issue. How is the head to hold two shares I understand, have to try, but the snaps and rivets I do not understand the differences.

Armando
7 October 2011 at 14:04 #75944
dcosta
Participant
@dcosta
Hello Mr. A. Meneses!

I am Portuguese and have a friend who used many rivets in two locomotives and a traction engine he built.

If you want You can see his work in the following URL:
http://vaporvivo.no.sapo.pt/ and http://br.youtube.com/ADVSebastiao

If you want I can ask him your question about rivets to him in Your behalf.

Maybe we understand better using our mother language for this particular subject.

Dias Costa

Edited By Dias Costa on 07/10/2011 14:06:57
7 October 2011 at 16:42 #75951
JasonB
Moderator
@jasonb
“The head diameter measures 7 / 32 and the diameter of Shank measures 1 / 8.”

That means the rivits have the correct size head so the problem must be with the snaps. Probably best to take up Dias’s kind offer as it will be easier in your own language.

J
6 June 2012 at 11:36 #92136
Armando Meneses
Participant
@armandomeneses27262
Hello
I've some time to appear. As I said, my work is very slow.
A few more questions.

It is better to buy an Arbor press, to rivet the work?
Where can I find one? And the snap´s to the arbor press?

Thank You

Armando Meneses
6 June 2012 at 11:56 #92141
Ady1
Participant
@ady1
Ebay can be useful

Search for "Hand Press for rivets"

or "Hand Press for eyelets"

Edited By Ady1 on 06/06/2012 11:58:12
6 June 2012 at 12:26 #92146
JasonB
Moderator
@jasonb
An arbor press or fly press will do those sort of sizes of rivits quite easily but you will have to make your own Sanp & dolly. You alsoi need to ensure the snap is held vertically above the rivit otherwise you can bend the rivit so there is no gain.

Bruce engineering do the hand presses but I've not tried one myself

J
6 June 2012 at 12:51 #92149
dcosta
Participant
@dcosta
Hello Armando Meneses!

You can find in Portugal under the brand Optimum three sizes of arbor press. You can find their catalog here page 209.

I have the 1 ton model and I used it when replacing the bearings in my BF20 milling Without it i couldn't do the job.

With a press like this You can press rivets and more…

Best regards

Dias Costa

Edited By dcosta on 06/06/2012 13:05:45
2 November 2012 at 14:53 #102519
Armando Meneses
Participant
@armandomeneses27262
Hello.

Which of the two options is the best?

Casting – Gunmetal or Cast iron.

Or is preferable bronze?

Thank you

Armando Meneses
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