Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-25-08, 03:42 PM   #1
Endofcomment
Junior Member
Thread Starter
 
Join Date: Apr 2008
Bikes:
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Frame builders help me

Hi guys

I recently purchased this aluminum frame, main triangle is aluminum rear is carbon http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=007 , and the welds wherent finished like some of the high end road frames with "hand finished welds" so I was pondering on finishing the welds my self and re painting the frame since it came in a plan jane color I thought I would spice it up a notch (BAM) <--- where did that come from... so I got some emery cloth from the hardware store in different grits and I was just gonna sand them down smooth so questsions first do I just sand away or should I remove the pain in the area and apply some bondo and then finish it up like that because I dont want to take out to much of the filler metal on the welds and weaken the weld itself. suggestions hints tips guides whatever is appreciated
Thanks
Endofcomment is offline   Reply With Quote
Old 05-25-08, 06:22 PM   #2
JBD
French Warmonger
 
JBD's Avatar
 
Join Date: Mar 2006
Location: Greetings from Michigan The Great Lake State
Bikes: Lyon Follis, raleigh sportif, giant unknown, centurian lemans r.i.p.
Posts: 350
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Emeril! Live!

bondo would be a safer bet as you wouldn't be removing any (potentially structurally important) material.
JBD is offline   Reply With Quote
Old 05-25-08, 10:07 PM   #3
NoReg
Banned
 
Join Date: Aug 2005
Bikes:
Posts: 5,117
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You aren't supposed to sand welds. It upsets the load carying ability of the weld material. Welds have a grain to them and if you just cut across them they may end up with a less optimal grain holding the tension. Equally important is that it is far too easy to sand into the adjascent tubes.

I would use bondo, or if you have it around, 5 minute epoxy with a little talc added to reduce it's tendancey to sag, though you do need to leave it wet enough to bond. These will be fine as long as you aren't powder coating, check threads on that.

Welds shouldn't be hand finished, they should be layed down right in the first place! But often they aren't even on pretty nice bikes. Of course some welds come with that extra little pile just layed on the top, which clearly doesn't add anything. You can file that out as long as you don't go too deep.

I attached a picture of some Don Feris TIG welds that have his imaculate overmelt so that there aren't even any dimes. That is the mark of a great artist with the torch. It isn't necesarry for good welds though. And the use of bondo or an overlay of tigged bronze is considered perfectly normal.
Attached Images
File Type: jpg Don.jpg (62.1 KB, 27 views)
NoReg is offline   Reply With Quote
Old 08-12-08, 02:30 PM   #4
Endofcomment
Junior Member
Thread Starter
 
Join Date: Apr 2008
Bikes:
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok guys I know its been a while since I asked about this but I finally got it all finished painted and rolling...

to the guy who suggested JB weld I never thought of that stuff as a filler and you know its water soluble when wet and you can eat it...

here are some pics



and last but not least a blurry cell phone pic of the whole thing
(notice the sweet copper chainstay protector, yeah thats right I made that!)


I will try and get some better pics later on of all the joints and do a comparison.

Thanks guys

Last edited by Endofcomment; 08-12-08 at 02:34 PM.
Endofcomment is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:38 PM.