Author Topic: Gaskets  (Read 1203 times)

Online Greybeard

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Re: Gaskets
« Reply #15 on: 24.11. 2017 13:18 »
Angus, you need this.
https://goo.gl/

Online chaterlea25

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Re: Gaskets
« Reply #16 on: 25.11. 2017 00:25 »
Hi
You could buy  lot of gaskets for £185  *????*

Making gaskets needs a little practice, I mark out the outer outline with a pen or pencil, then mark out the holes
I make the holes  before cutting the profile as the material is well supported for punching through
I have several different methods of  making the holes,
ranging from ball bearings that you tap against the casing hole,  a proper punching pliers, hollow punches and so on
My favourite gizmo is a T section steel block that sits in/on the machine vice
It has a row of different size holes drilled through it, from 1/8th to 1/2 in.
Matching hollow punches are fitted to the drill chuck and lined up with the desired hole in the block
winding down the drill quill neatly punches through any gasket material
It will also punch shim stock and  thin alloy sheet  *smile*

John
1961 Super Rocket
1963 RGS (ongoing)

Offline duTch

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Re: Gaskets
« Reply #17 on: 25.11. 2017 09:20 »
 
Quote
Quote from: duTch on November 24, 2017, 19:29:41

    I've been making my own for as long as I've owned a Beeza (since '70's)

What material do you use to make them from?
What technique do you use for cutting them, and in particular for making the screw/bolt holes?

Thanks - Rowan

 When I couldn't buy a new head gasket mayny years ago, I sought out some sheet copper and made one. Traced around with the old one, and being short on tools at the time, I used a centre-punch to perforate outside/inside the marking and dressed the bore holes with a Rat-tail file.

 Gasket paper in the past was easier to source and in various thickness, so now I only have a couple thereof (maybe 0.4mm &.8mm ?).
 Initially I did the small Ball-pein hammer to perforate the edges and holes as mentioned above, but soon realised it's too easy to round the edges of the casing, so started doing the trace around and punch the holes with a hole punch (as mentioned above)cut the paper oversize and trim it after fitting.....all this is allready documented in other threads.

 Maybe you can come up with a better and more obvious method no-one ever thunk of before... *work*

  ** I already mentioned that some interfaces need clearance/endfloat scrutiny

Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline Angus

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Re: Gaskets
« Reply #18 on: 25.11. 2017 09:52 »
Not bought the scan and cut yet and waiting for price to drop. But it has other uses AND can cut any gasket once scanned, keep the scan for future use and offer a service to friends (especially those with as they call them proper vintage bikes).
1961 A7 since 1976
1960 A10 Gold Flash Super Profile Bike
1958 Matchless G80 Project
1952 Norton Model 7 Plunger
1950 T100

Online bsa-bill

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Re: Gaskets
« Reply #19 on: 25.11. 2017 11:16 »
https://goo.gl/

Doesn't work for me, goes to a url shortening place
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline BSA_54A10

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Re: Gaskets
« Reply #20 on: 25.11. 2017 11:29 »
I would like to make my own gaskets and have tried but failed, using proper hole punch tool and multiple scalpels. I am considering one of these
They can cut thing on up to A3 paper size and can cut card, so scan old gasket or case if possible, adjust if required and cut from gasket paper.

scan you gaskets and take the scan to any one who does plastic cut out decals.
That machine can cut up to 1/4" thick in any size up to 100' rolls.
A customer who did this along with digital printing was cutting gaskets this way 15 years ago.
They had a very large flatbed scanner so I would put my case on the scanner, drape a velvet blanket over it then scan the joint.
He dropped the scan into the softwear & cut the gasket .
We used to glue old gasket material onto thick paper to load into the machine if we were not using a full sheet of jointing.

The same machines are used to forge signatures by substituting the blade for a chisel point pen.
Very hard to tell the digitl forgery from the original, except all the digital ones are identical. 
Bike Beesa
Trevor

Offline rowan.bradley

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Re: Gaskets
« Reply #21 on: 25.11. 2017 12:51 »
Scan-and-cut sounds an interesting approach, although I would not need the scanner, as I already have an A3 scanner. So I just need something to do the cutting. I will see if I can find someone who does custom vinyl decal cutting who is prepared to do it. Has anyone tried cutting modern gasket material with a laser cutter? Another possibility might be to use my local makespace who has a laser cutter, and do it there.

Thanks - Rowan


Current bike: 1958 A10 Super Rocket (in bits), purchased in 1967.
Previous bikes: M21

Online Greybeard

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Re: Gaskets
« Reply #22 on: 25.11. 2017 16:43 »
https://goo.gl/

Doesn't work for me, goes to a url shortening place


Yup, that was the intention.



Online bsa-bill

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Re: Gaskets
« Reply #23 on: 25.11. 2017 16:51 »
Quote
Yup, that was the intention.

ok  ---  so how does that get me see  a scan and cut machine
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Online Greybeard

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Re: Gaskets
« Reply #24 on: 25.11. 2017 16:53 »
Quote
Yup, that was the intention.

ok  ---  so how does that get me see  a scan and cut machine


Angus's link was horrendously long so I showed him how to get a short version.

Online bsa-bill

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Re: Gaskets
« Reply #25 on: 25.11. 2017 19:14 »
ah right I somehow missed Angus's post on page one, my missus does a bit crafting so was interested
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Online muskrat

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Re: Gaskets
« Reply #26 on: 25.11. 2017 23:17 »
Once every few years I buy a set of gaskets (now and then in a hurry so use one or two) and use them as a template and trace them onto oil jointing, either 0.4 or 0.8mm thick. Wad punch the hols then cut out with a scalpel. Only takes a few minutes. For $50 of material I can make at least 5 sets.
Cheers
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Offline BSA_54A10

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Re: Gaskets
« Reply #27 on: 27.11. 2017 00:15 »
Any one thinking of a scan & cut machine, check out the price & availability of replacement blades.
Most of the commercial machines run Rowland knives and they are, well not cheap and not able to be sharpened because the height off the table is critical.
Bike Beesa
Trevor

Offline RogerSB

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Re: Gaskets
« Reply #28 on: 02.12. 2017 19:38 »
I've been making my own for as long as I've owned a Beeza (since '70's)
What material do you use to make them from?
What technique do you use for cutting them, and in particular for making the screw/bolt holes?

Thanks - Rowan

Traditionally you use a 2oz ( very small ) ball pane hammer.
Tapping on the edges will cut the gasket paper start with the holes then use a bolt as a punch to knock the little circle out.
leave the bolts in the holes to hold the gasket in position the do the inside followed by the outside.
The other way is to smear the surface with some old dirty oil ( bearing blue if you are anal ) then press the cover into the gasket material.
Knock out the holes with a wad punch then cut the gasket around the image with a scapel or pair of scissors


Me too, ball peen hammer with Flexoid oil and water resistant gasket paper, either 0.4mm or 0.8mm depending on use. A mechanic friend of mine showed me this method many years ago. I tap the holes and around the edges until I cut through the paper, any areas not quite separated I trim with scissors or a scalpel. I never buy a paper gasket as they are so easy to make.

1960 Golden Flash