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#450135 - 7th Dec 2010 8:23pm aluminium welder wanted
markeee Offline
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Registered: 9th Jun 2005
Posts: 2163
Loc: wirral
got a bike frame i need fixing
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#450136 - 7th Dec 2010 8:35pm Re: aluminium welder wanted [Re: markeee]
chris_gilly Offline

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Registered: 15th Feb 2009
Posts: 1950
Loc: tranmere
cant you buy a cheap arc and buy the right sticks?

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#450137 - 7th Dec 2010 8:37pm Re: aluminium welder wanted [Re: markeee]
kimpri Offline

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Registered: 29th Oct 2008
Posts: 3553
Loc: birkenhead
mike hose motorcycles kelvin rd wallasey, right opposite st Paul's rd.
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#450242 - 8th Dec 2010 10:24am Re: aluminium welder wanted [Re: kimpri]
vw_kyle Offline
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Registered: 27th Dec 2006
Posts: 1984
Loc: wirral
altrite mate try arrowebrook engineering on poulton road use to work there they,ll do a good job

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#450387 - 8th Dec 2010 2:46pm Re: aluminium welder wanted [Re: vw_kyle]
anniebo28 Offline
Wise One

Registered: 7th Aug 2006
Posts: 845
Loc: Birkenhead
You dont want to buy a TIG set just to do one bike frame. A crap second hand one will set you back over 250. You can use MIG with the right wire and gas but the weld is rubbish, you cant use ARC as its way too powerful and will blow holes in the thin gauge metal.
Take it to an engineering company and they will do it for you for cheap, if you speak to them nice, they may even do it for free!
I have had TIG sets before and you want someone who can properly TIG weld and not just someone who can melt some metal over the crack, especially when its going to be taking a structural load, i.e. bike frame.

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#450393 - 8th Dec 2010 3:04pm Re: aluminium welder wanted [Re: anniebo28]
dan0h Offline

Old Hand

Registered: 27th Aug 2010
Posts: 309
Loc: Wallasey
Tread careful if its an expensive frame, it could well have quite a high percentage of magnesium in the alloy, and it's no fun to end you're life in a huge flash of white light.
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#450407 - 8th Dec 2010 4:17pm Re: aluminium welder wanted [Re: dan0h]
diggingdeeper Offline

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Registered: 9th Jul 2008
Posts: 10796
Loc: Birkenhead
Any form of aluminium welding is very specialised, and as Danoh says, an alloy can be even more specialised.

The idea of an amateur or even a steel welder attempting an aluminium job is a farce.
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#450410 - 8th Dec 2010 5:00pm Re: aluminium welder wanted [Re: diggingdeeper]
DavidB Offline
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Registered: 7th Dec 2003
Posts: 5634
Loc: Bebington, Wirral
Get aluminium wire for mig. I've never tried it but it's more delicate than steel.
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#450411 - 8th Dec 2010 5:03pm Re: aluminium welder wanted [Re: markeee]
fabby Offline
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Registered: 19th Sep 2009
Posts: 110
Loc: new ferry
do you have picture

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#450474 - 8th Dec 2010 8:09pm Re: aluminium welder wanted [Re: fabby]
dan0h Offline

Old Hand

Registered: 27th Aug 2010
Posts: 309
Loc: Wallasey
To reiterate DD's comments - Ally welding is about as complex as its gets, for something that you'll be putting a lot of load into, the material needs to be immaculately clean with no impurities or dirt. Chemical cleaning would be recommended.

If its an expensive enough frame to warrant the repair, its probably an exotic enough alloy to not really be a feasible weld.
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#450519 - 8th Dec 2010 10:05pm Re: aluminium welder wanted [Re: dan0h]
markeee Offline
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Registered: 9th Jun 2005
Posts: 2163
Loc: wirral
dont know what or where to go as it was a 2k bike !



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#450537 - 8th Dec 2010 10:53pm Re: aluminium welder wanted [Re: markeee]
Nigel Offline

Wise One

Registered: 26th Mar 2010
Posts: 850
Loc: Wirral
Originally Posted By: markeee
dont know what or where to go as it was a 2k bike !






Try AMF engineering on the croft bussiness park Brombourough 0151 346 1166. They always used to be able to weld Ally, I think they still do.
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#450552 - 8th Dec 2010 11:47pm Re: aluminium welder wanted [Re: Nigel]
dan0h Offline

Old Hand

Registered: 27th Aug 2010
Posts: 309
Loc: Wallasey
Cripes. Full marks for breaking it there though. Good effort! It'll need all that paint stripping off for a start.

Do you not think you'd be better off ripping all the good stuff off and buying a new frame? I can't see you'll ever get a structurally sound repair so close to that pivot.

-> http://www.chainreactioncycles.com/Categories.aspx?CategoryID=625
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#450558 - 8th Dec 2010 11:58pm Re: aluminium welder wanted [Re: dan0h]
dan0h Offline

Old Hand

Registered: 27th Aug 2010
Posts: 309
Loc: Wallasey
Heres a suggestion (far from ideal) -

1. Drill each end of the crack out with a 3mm drill to stop it spreading.

2. De-tension the rear shock and remove the pivot.

3. Get yourself a good quality seat post, cut the top off so its merely a tube with no right angle, drop it (or force it) down the tube overlapping the crack, then drill it all the way through above and below the crack to bolt it in place.

Its a nasty fix, but it might save you a frame and a lot of very invasive welding, that will ruin all your paint and probably distort the frame.

Sympathy to you bud. Nasty.

EDIT: By the look of it though, the bosses that mount the pivot and top tube may well interfere with the consistency of the seat post, so a tube may not go all the way down it - worth a look though.


Edited by dan0h (9th Dec 2010 12:00am)
Edit Reason: Re-think
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#450563 - 9th Dec 2010 12:28am Re: aluminium welder wanted [Re: dan0h]
MrPhil Offline
Forum Master

Registered: 14th Apr 2006
Posts: 2367
Loc: Prenton
To be honest even if you did weld it i'd say in 12 months it will be back.

dan's suggestion with a seat post down it is a good idea. get an enineering firm to turn a solid piece in a transition fit with M8 female thread in one end so a stud bar can aid fitment to the correct depth.

Drill the frame in 4 points (2 top and 2 bottom) so you can pool weld from frame to boss inside the frame.

Then repair the original split. This will stop the frame twistin from the heat.

Try TSW engineering in Brom, maybe get it done as a forgeiner.
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