Author Topic: Scrap barrels wanted  (Read 768 times)

Offline route 66

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Scrap barrels wanted
« on: 15.03. 2023 09:44 »
Does anyone have any scrap barrels that I could use for pieces of fins to repair mine? Any help appreciated
61 GF 58 SR

Online sean

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Re: Scrap barrels wanted
« Reply #1 on: 15.03. 2023 19:39 »
swap meet or local buy and sell might be your best bet as its a heavy item to ship .

Offline chaterlea25

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Re: Scrap barrels wanted
« Reply #2 on: 15.03. 2023 21:28 »
Hi All,
I got a couple of Bantam barrels as fin donors, they have good deep fins so lots of material in them
A lot cheaper than A series to post as well

John
1961 Super Rocket
1963 RGS (ongoing)

Online orabanda

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Re: Scrap barrels wanted
« Reply #3 on: 16.03. 2023 06:12 »
Or you could shape the fins from mild steel & weld on.......

Offline route 66

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Re: Scrap barrels wanted
« Reply #4 on: 16.03. 2023 10:32 »
Thanks guys,I got a barrel from a bantam for £15,job done
61 GF 58 SR

Online BagONails

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Re: Scrap barrels wanted
« Reply #5 on: 16.03. 2023 11:11 »
Or you could shape the fins from mild steel & weld on.......
How did you go with the welding Orabanda, did you preheat the cast iron barrel first also interested to know what rods you used if MMA welding or did you use MIG? I've got an A7 barrel with a few fins missing...
Ian
59 GF A10
67 Spitfire under resto
2013 kwaka W800 Desert Sled (ex write off)

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Online orabanda

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Re: Scrap barrels wanted
« Reply #6 on: 16.03. 2023 11:14 »
BagoNails,
Yes; preheat required.
Used the rods recommended by BOC (not cheap).
Successful repair recently of A& LS head; will dig up the pics.

Online sean

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Re: Scrap barrels wanted
« Reply #7 on: 16.03. 2023 12:07 »
BagoNails,
Yes; preheat required.
Used the rods recommended by BOC (not cheap).
Successful repair recently of A& LS head; will dig up the pics.
.                       

Ni rod is for cast iron it can also be brazed or silver soldered pre heat , chamfer edges to be joined and let everything cool slowly together……. Likely lots of vids on u tube

Offline Brian

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Re: Scrap barrels wanted
« Reply #8 on: 16.03. 2023 20:14 »
I repaired a set of barrels some time ago using milds steel plate, stitch welded with a mig. I have done quite a few fin repairs like this now and all have worked out well.

Online KiwiGF

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Re: Scrap barrels wanted
« Reply #9 on: 16.03. 2023 20:22 »
I repaired a set of barrels some time ago using milds steel plate, stitch welded with a mig. I have done quite a few fin repairs like this now and all have worked out well.

Std m/s wire used I guess?

Any particular technique eg tack, then “stop/start” eg weld 1/2” then stop and let it cool) or just weld in one go?

Does the fin bend towards the weld due to contraction?
New Zealand

1956 A10 Golden Flash  (1st finished project)
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1968 B44 Victor Special (3rd finished project)
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Offline Brian

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Re: Scrap barrels wanted
« Reply #10 on: 16.03. 2023 20:41 »
Yes just standard mild steel wire. Tack weld, no more than about 1/4" at a time them move to the other end and so on, takes time. If you hear it "tink" then you have welded too much in one go. I ground down the end where it is visible but left the weld elswhere, the fin doesnt seem to bend doing it this way. Its a slow process but has worked well for me. Once cleaned up and painted the repair is invisible.

Offline route 66

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Re: Scrap barrels wanted
« Reply #11 on: 16.03. 2023 21:59 »
That looks great,pity youre so far away
61 GF 58 SR

Offline chaterlea25

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Re: Scrap barrels wanted
« Reply #12 on: 19.03. 2023 00:31 »
Hi All,
I repaired a badly (crash) damaged cylinder, the bike was T boned  *eek* on the right hand side..
As the engine had been recently rebuilt I wanted to salvage as much as possible
Four or five fins were smashed as far as the core, I cleaned up the jagged edges and cut replacement fins from a Bantam cylinder. I opted to braze the replacement fins in place, pre heating in the barbecue and cooling very slowly
Despite all this the bore on that side distorted by 3-4 thou  *sad2*
As the pistons that had been fitted were well scored due to too tight clearance, a rebore was needed anyway

John
1961 Super Rocket
1963 RGS (ongoing)

Offline Stephen Foster

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Re: Scrap barrels wanted
« Reply #13 on: 20.03. 2023 08:55 »
That looks great,pity youre so far away

Did You preheat or post heat Brian please ?
If so what temperatures did You use /
Thank You .
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline Brian

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Re: Scrap barrels wanted
« Reply #14 on: 20.03. 2023 20:21 »
No heating before or after. If I was welding with a flame or a stick welder I would pre heat but a mig puts very little heat into what your welding and by doing small welds at a time nothing warps.