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Forum: Framebuilders
05-03-21, 10:46 AM
Replies: 12
Views: 390
Posted By unterhausen

The failure was not due to fatigue, as far as I...

The failure was not due to fatigue, as far as I can tell. Your pictures aren't great, but fatigue on something like this would show some amount of discoloring on the fracture surface. From what I...
Forum: Framebuilders
04-26-21, 04:51 AM
Replies: 19
Views: 752
Posted By KPacenti

I've received a couple PM's asking what I do...

I've received a couple PM's asking what I do these days.
Below is a picture of a packaging solution (rack) I recently developed. It holds spoilers for the Volkswagen Passat....
Forum: Framebuilders
04-20-21, 10:12 AM
Replies: 16
Views: 630
Posted By unterhausen

Thanks for posting this thread. I applaud your...

Thanks for posting this thread. I applaud your desire to learn new things. I'm waiting until you decide you have to build a Ti frame.

JB weld is a metal filled epoxy. So it's not too surprising...
Forum: Framebuilders
04-20-21, 09:11 AM
Replies: 16
Views: 630
Posted By Andrew R Stewart

Nice work and story! Andy

Nice work and story! Andy
Forum: Framebuilders
04-20-21, 08:45 AM
Replies: 16
Views: 630
Posted By dsaul

I forgot to mention the cable guides. The...

I forgot to mention the cable guides. The downtube has 3d printed guides that bolt on to more bottle bosses welded on the underside of the downtube. After the bottle boss welding, there was no way...
Forum: Framebuilders
04-20-21, 08:36 AM
Replies: 16
Views: 630
Posted By dsaul

This is the completed bike. I put it together as...

This is the completed bike. I put it together as inexpensively as possible, using some parts I already had and a Sensah SRX Pro 1 x 11 group and Tektro mechanical disc brakes. The Sensah rear...
Forum: Framebuilders
04-20-21, 08:24 AM
Replies: 16
Views: 630
Posted By dsaul

Finished frame pics. As I said earlier, raw...

Finished frame pics. As I said earlier, raw material in 7005 is not available in the US, so I had to use a cutoff from one of the seatstays for a bridge. I would have preferred to have a curved...
Forum: Framebuilders
04-20-21, 08:20 AM
Replies: 16
Views: 630
Posted By dsaul

The welding of the rest of the frame went as well...

The welding of the rest of the frame went as well as could be expected for my level of experience in welding aluminum bike frames.
...
Forum: Framebuilders
04-20-21, 08:02 AM
Replies: 16
Views: 630
Posted By dsaul

I decided to make this frame as an aluminum...

I decided to make this frame as an aluminum version of my steel gravel frame, since I was happy with the handling of that frame and it would be an opportunity to see if the aluminum version would...
Forum: Framebuilders
04-20-21, 07:44 AM
Replies: 16
Views: 630
Posted By dsaul

7005 Aluminum frame build

As a hobby framebuilder, I like to keep learning new skills and testing myself. I've built around 20 steel frames, starting with a lugged frame and moving to fillet brazing and then TIG welding. I...
Forum: Framebuilders
04-19-21, 08:41 PM
Replies: 10
Views: 631
Posted By Andrew R Stewart

I now use an Anvil mitering fixture. But I hand...

I now use an Anvil mitering fixture. But I hand did a number before and agree with the ease of slight offness in stay lengths. That's one reason to build with BB shells that have sockets:) Even with...
Forum: Framebuilders
04-19-21, 02:25 PM
Replies: 10
Views: 631
Posted By jimn

I made a version of the setup pictured above...

I made a version of the setup pictured above using Alex Meade's tubing blocks for small oval tubing.

...
Forum: Framebuilders
04-18-21, 02:42 PM
Replies: 19
Views: 752
Posted By KPacenti

New Here

I just found this forum and wanted to introduce myself.

While I've been out of the framebuilding supply business for a few years, I am still passionate about the craft and happy to pass along all...
Forum: Framebuilders
04-16-21, 10:34 AM
Replies: 1
Views: 318
Posted By Andrew R Stewart

Ceeway Props!

I have to give Peter and Ceeway some big props. I requested an order quote on 4/13 and today, 4/16, I have the tubes on my bench. One day of that was receiving the quote and replying to it. That's...
Forum: Framebuilders
04-13-21, 03:40 PM
Replies: 21
Views: 823
Posted By Doug Fattic

I'd be surprised if anyone built frames around...

I'd be surprised if anyone built frames around 27" wheels after the 70's but it is possible. Any dent in a heat treated tube creates the possibility of cracking where the dent is located. I've seen...
Forum: Framebuilders
04-13-21, 11:31 AM
Replies: 21
Views: 823
Posted By Doug Fattic

There was a problem with 753 chain stays breaking...

There was a problem with 753 chain stays breaking when it 1st came out. I had 2 Raleigh frames come through my frame shop that had cracked chain stays. That scared me off of getting my 753...
Forum: Framebuilders
04-13-21, 07:05 AM
Replies: 21
Views: 823
Posted By bulgie

Not quite; tempering means to try to get some...

Not quite; tempering means to try to get some toughness back after the quench leaves the steel in a hard but brittle state. Tempering weakens the steel but if done right leaves the steel still...
Forum: Framebuilders
04-11-21, 07:30 PM
Replies: 77
Views: 6,375
Posted By duanedr

Wow, thanks for sharing. Reinforces how lucky...

Wow, thanks for sharing. Reinforces how lucky you are to have ended up with as little damage as you did! Heal up.
Forum: Framebuilders
04-11-21, 12:32 PM
Replies: 77
Views: 6,375
Posted By Andrew R Stewart

The autopsy is finished and the patient died of...

The autopsy is finished and the patient died of blunt force trauma. Yes this frame is toast. It's actually rather interesting in how the various bends and dents are.

First and most obvious is the...
Forum: Framebuilders
04-09-21, 09:11 PM
Replies: 77
Views: 6,375
Posted By Andrew R Stewart

Duanedr- No, the seat stays are straight. I used...

Duanedr- No, the seat stays are straight. I used a Park F.A.G. (auto censor...) and my speculation of 1" of off center rear end is darn close to reality. 2" of gaged difference. The mono stay is not...
04-09-21, 12:50 PM
Replies: 15
Views: 462
Posted By Andrew R Stewart

One of my riding buddies (and generally great...

One of my riding buddies (and generally great friend) runs a belt on his co motion (with Pinion transmission). He loves his bely drive but wore out the Al rear pulley before the belt was used up. He...
04-09-21, 10:28 AM
Replies: 273
Views: 16,335
Posted By Erzulis Boat

Yep. It just dawned on me that "his" brand Pragma...

Yep. It just dawned on me that "his" brand Pragma is very close to Dogma. Durianrider is entertaining.
04-08-21, 07:44 PM
Replies: 15
Views: 462
Posted By Andrew R Stewart

Just make sure that the IHG is rated for the...

Just make sure that the IHG is rated for the tension that a belt drive needs to have. Belts place a lot of force on the BB and hub/freehub body, driver. Andy
Forum: Framebuilders
04-08-21, 02:57 PM
Replies: 77
Views: 6,375
Posted By Andrew R Stewart

I had hoped it would be a while before I added to...

I had hoped it would be a while before I added to this thread but sometimes fate says otherwise. Just got back from my second ride on this bike and now have some feedback on the construction,...
Forum: Framebuilders
04-06-21, 08:39 PM
Replies: 9
Views: 598
Posted By duanedr

Yes, ovalize at the BB works. you shouldn't have...

Yes, ovalize at the BB works. you shouldn't have an issue at the HT. I agree with Andrew, the ovalizing tool doesn't have to be high-zoot.
Forum: Framebuilders
04-02-21, 09:48 AM
Replies: 115
Views: 7,672
Posted By duanedr

Did it work? That's the only thing that...

Did it work? That's the only thing that matters...well, and how long I would have to sleep on the couch for pulling that kind of stunt! :lol:
Forum: Framebuilders
04-01-21, 12:54 PM
Replies: 115
Views: 7,672
Posted By Andrew R Stewart

OK, here's the tent. To be sure I will not do...

OK, here's the tent. To be sure I will not do this again, this way and in this place! I have no shots of the decal hickeys as i found them but they did recede to a degree (bad pun) as things cooled...
Forum: Framebuilders
04-01-21, 09:59 AM
Replies: 115
Views: 7,672
Posted By Andrew R Stewart

I have considered making a wet spray baking box...

I have considered making a wet spray baking box for years. A simple industrial heat gun or hair dryer stuck in a port seems like a good heat source. For the 150-200 degrees F that wet paint likes for...
Forum: Framebuilders
03-31-21, 03:11 PM
Replies: 115
Views: 7,672
Posted By Aldatroid

Thanks!! I used Montana spray cans. Montana...

Thanks!!

I used Montana spray cans. Montana metal primer, Montana Metallic and Montana Gloss Varnish. It looks better than it holds up 😂. I know my prep work is not great over the whole frame but...
Forum: Framebuilders
03-31-21, 05:29 AM
Replies: 115
Views: 7,672
Posted By Aldatroid

Hi guys! It's finally finished and I've taken her...

Hi guys! It's finally finished and I've taken her out on a few trails and seems to handle really well. I don't have that much to compare to so might not be that telling to be honest =)

But yeah,...
03-30-21, 12:30 PM
Replies: 38
Views: 1,212
Posted By wgscott

QR 135mm disc is/was quite prevalent, and is not...

QR 135mm disc is/was quite prevalent, and is not quite dead yet. You can still get many hubs that allow QR as well as thru-axle (eg: White Industries). (135mm QR is the same size as 142mm TA, so hubs...
Forum: Framebuilders
03-29-21, 12:55 PM
Replies: 4
Views: 407
Posted By duanedr

Repairing Bulged Steerer tube

Thought this might be interesting. I had to extract a stem from steerer on an early 80's Columbine. The prior owner buggered up the Campy SR headset obviously not knowing what they were doing. Well,...
03-29-21, 09:21 AM
Replies: 38
Views: 1,212
Posted By Kapusta

I would not worry about going 135mm rear with...

I would not worry about going 135mm rear with with 68 bb width. There are lots of stock frames that come that way. My Soma Fog Cutter is an example.

Iím fine with QR discs, but TA is really a...
03-29-21, 08:39 AM
Replies: 38
Views: 1,212
Posted By HillRider

Well, my newest bike is a Surly Midnight Special...

Well, my newest bike is a Surly Midnight Special that has a 68mm English threaded bottom bracket and 12x142 TA rear spacing. It works very well.
03-29-21, 07:18 AM
Replies: 38
Views: 1,212
Posted By dsaul

130 disc hubs were a rare thing even when 130 was...

130 disc hubs were a rare thing even when 130 was the road standard. I doubt anyone is putting any effort into making them now. If you insist on sticking with QR, I would suggest building a frame...
03-29-21, 06:17 AM
Replies: 38
Views: 1,212
Posted By shelbyfv

Yes, you can still find convertible disc hubs but...

Yes, you can still find convertible disc hubs but the QR and narrow width are going to be increasingly marginalized. If you are starting from a clean slate, thru axle is the best choice. IMO, the...
03-29-21, 06:06 AM
Replies: 38
Views: 1,212
Posted By Litespud

if youíre still building the frame (ie still have...

if youíre still building the frame (ie still have the option of QRs or thru-axles), thru-axles in a heartbeat, simply for the convenience and availability. Thereís nothing inherently wrong with QRs -...
03-29-21, 05:51 AM
Replies: 38
Views: 1,212
Posted By Koyote

I don't know much about this, but I suspect your...

I don't know much about this, but I suspect your best bet is to find T/A hubs that are convertible to QR with different end caps.

Better yet, go with T/As. If you don't like carrying a hex, get...
03-29-21, 05:24 AM
Replies: 38
Views: 1,212
Posted By hounslow

130 disc never took off as 135 and then 142,...

130 disc never took off as 135 and then 142, boost etc became normal on all disc bikes. 130 disc places the flanges too close together so it makes the wheel as a whole weaker. Literally the only...
Forum: Framebuilders
03-28-21, 10:05 AM
Replies: 37
Views: 2,311
Posted By Andrew R Stewart

This welding learning thing reminds me of what a...

This welding learning thing reminds me of what a Chinese restaurant owner told me years ago. It only takes a few minute to learn how to eat with chop sticks. But a lifetime to become good at it. 35...
Forum: Framebuilders
03-28-21, 09:45 AM
Replies: 26
Views: 1,604
Posted By Cynikal

I keep checking back to see if someone tried the...

I keep checking back to see if someone tried the explosive method. I want photos.
Forum: Framebuilders
03-26-21, 04:10 AM
Replies: 21
Views: 985
Posted By bulgie

Could you explain what you mean in more detail? ...

Could you explain what you mean in more detail? Your short statement is a bit ambiguous, but it sounds wrong to me no matter how I parse it.

Did you mean the lightest fork blade (what this thread...
Forum: Framebuilders
03-25-21, 04:16 AM
Replies: 30
Views: 2,738
Posted By apollodriver

Very cool, what a clever idea - my todo list...

Very cool, what a clever idea - my todo list just gets a bit longer . Aweseome thread!

keep up this outstanding work! It rocks
Forum: Framebuilders
03-25-21, 12:08 AM
Replies: 21
Views: 985
Posted By bulgie

Ha ha, no, not in those years, but In the '40s...

Ha ha, no, not in those years, but In the '40s and '50s (maybe earlier too), smaller diameter blades at the bottom were in vogue, specifically for rough-pavement comfort. I have 531 blades as small...
Forum: Framebuilders
03-24-21, 06:46 PM
Replies: 12
Views: 807
Posted By duanedr

You are including the triangle under the headtube...

You are including the triangle under the headtube and forward to the front axle. That wouldn't be within the fixture length. This probably frees up 200mm or so...I don't think anyone would ever...
Forum: Framebuilders
03-24-21, 12:12 AM
Replies: 12
Views: 807
Posted By duanedr

I don't disagree with the idea of going as long...

I don't disagree with the idea of going as long as you can but generally with the long slack geometry, the rear end is quite short. I haven't done anything that didn't comfortably fit on 1220mm...
Forum: Framebuilders
03-22-21, 09:13 PM
Replies: 21
Views: 985
Posted By unterhausen

I'll see if I can measure those fork blades. I...

I'll see if I can measure those fork blades. I disassembled the fork they were in a couple of years ago. I think the big difference between 531 and 531sl fork blades may have been that the 531sl...
Forum: Framebuilders
03-22-21, 05:51 AM
Replies: 21
Views: 985
Posted By bulgie

Not quite. 653 had 531 forks (no heat-treat @...

Not quite. 653 had 531 forks (no heat-treat @ 120,000 psi), 753 rear stays (full heat treat @ 195.900 psi), and main triangle was 653 which is stronger than 531, I have heard that was via...
Forum: Framebuilders
03-21-21, 09:56 PM
Replies: 21
Views: 985
Posted By unterhausen

The 531SL blades were thinner, I thought. At...

The 531SL blades were thinner, I thought. At least the ones I have are.
Forum: Framebuilders
03-21-21, 07:59 PM
Replies: 21
Views: 985
Posted By bulgie

All the 753 blades I have measured were just as...

All the 753 blades I have measured were just as thick as 531. So even in the worst case where you lost the heat-treat, they'd be as strong as 531, which are if anything a bit too strong for my taste,...
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