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 01-30-11, 04:33 PM   #1
long john
Senior Member
Thread Starter
 
long john's Avatar
 
Join Date: Sep 2009
Location: new york
Bikes: cuevas
Posts: 630
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
rack tubing bending

what tubing jigs are you all using for racks. what is the common tube size for racks.
i am looking at the klien tools tubing bender from home depot. is this tool ok .
long john is offline   Reply With Quote
Old 01-30-11, 06:14 PM   #2
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,666
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Here are my tubing notes
Rack tubes
1/4 x .028 handlebar racks
3/8 x .035 Porteur and rear
some people use 5/16 instead of 3/8 for connecting bars.

Stem tubes
.065 and bore it out to a perfect fit for the steerer.
1.375" .058 for 31.8 bars
1.125" .058 for 25.4 bars
1.125" .049 for 26.0 bars
stems 90 - 100 mm for under 150lb riders . I use 1.125" .035
stems 105 - 120mm all weights 1.125" .049
all 1" ext stems get .049
all lugged stems get .035 ext. I turn the material for the lugs to .035 thick from either .065 (that has been bored) or .058.

frame tubes
1 1/4 x .058

Mixte tubes
1/2 x .035

People I know seem to be happier with the tubing from Aircraft Spruce. Dillsburg is cheaper for a reason, unfortunately. The stuff I got from Dillsburg is ok, but I know people that have gotten tubes with horrible surface finish from them. You don't notice until you clean off the tube either, because it's covered in grime.
unterhausen is offline   Reply With Quote
Old 01-30-11, 06:36 PM   #3
mudboy
Senior Member
 
mudboy's Avatar
 
Join Date: Sep 2008
Location: Collegeville, PA
Bikes: Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
Posts: 1,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Any idea how many feet of tubing go into a Blackburn-style rear rack? A rack is my next project and I'd like to know approximately how much to order.
mudboy is offline   Reply With Quote
Old 01-30-11, 07:37 PM   #4
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,666
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I'm just building my first racks now, so I don't know. I'm estimating 10, but take that with a grain of salt. If you really don't want to buy extra, you can draw it out. The corners don't really take up much more than just going straight.
unterhausen is offline   Reply With Quote
Old 01-30-11, 10:03 PM   #5
Live Wire 
Framebuilder
 
Join Date: Dec 2007
Bikes:
Posts: 532
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Agreed, 10 is spot on. Of course that assumes you plan well and put all your bends in the right spot (without crimping) on the first try.
Live Wire is online now   Reply With Quote
Old 01-31-11, 01:14 AM   #6
NoReg
Banned
 
Join Date: Aug 2005
Bikes:
Posts: 5,117
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The racks I make suck up 20 feet, but they are expedition weight. generally the preferred tubing bender is the Rigid, older model.

This is pricey, but would probably be worth it for a lot of bends:

http://www.aircraftspruce.com/catalo...rtypebendr.php



I use one of these:

http://www.princessauto.com/workshop...l-metal-bender

I bought it on sale. I don't use the pictured dies, I substituted 2 machinery type pulleys. I filled them in with epoxy using a Popsicle stick. Perfect 3/8" radius. Later I turned rollers for it out of steel.
NoReg is offline   Reply With Quote
Old 01-31-11, 09:50 AM   #7
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,666
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
the aircraft spruce link goes to benders that look like the Imperial/Gould benders. These are ok, and are easily found on ebay
unterhausen is offline   Reply With Quote
Old 01-31-11, 09:56 AM   #8
mudboy
Senior Member
 
mudboy's Avatar
 
Join Date: Sep 2008
Location: Collegeville, PA
Bikes: Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
Posts: 1,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I wonder if this would work for a beginner?
mudboy is offline   Reply With Quote
Old 01-31-11, 10:23 AM   #9
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,666
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I have one of those. It works ok on .028 1/4". I'm afraid to use it on anything else though.
unterhausen is offline   Reply With Quote
Old 01-31-11, 11:34 PM   #10
jmichaeldesign
Senior Member
 
Join Date: Sep 2007
Location: Colorado Springs, CO
Bikes:
Posts: 430
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As Unterhausen said the Harbor Freight one works well on 1/4 .028, I tried it on 3/8, but can't remember the wall thickness, anyway, I snapped it trying to bend the 3/8 tubing.
jmichaeldesign is offline   Reply With Quote
Old 02-01-11, 08:56 PM   #11
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,666
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I'm doing a happy dance because I just won a Rigid bender on the 'bay. I'm not telling you what I really want, they already cost too much for me to afford right now.
unterhausen is offline   Reply With Quote
Old 02-01-11, 09:15 PM   #12
mudboy
Senior Member
 
mudboy's Avatar
 
Join Date: Sep 2008
Location: Collegeville, PA
Bikes: Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
Posts: 1,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Unterhausen, which model number did you get?
mudboy 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 07:31 AM.