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Search: Posts Made By: duanedr
Showing results 1 to 50 of 345
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Forum: Framebuilders
04-09-24, 07:43 PM
Replies: 6
Views: 325
Posted By Andrew R Stewart

Good to see better photos. I agree with Eric, If...

Good to see better photos. I agree with Eric, If I were to consider fixing this I would likely replace the tubes. But I'd want to check out the rest of the frame first. Andy
Forum: Framebuilders
04-08-24, 11:40 PM
Replies: 13
Views: 569
Posted By GrayJay

Aluminum tube welding repair is really only...

Aluminum tube welding repair is really only practical on 7005 or other "naturally aged" alu metallurgy. Majority of commercial aluminum frames use 6061-T6 with T6 heat treating needed to restore...
Forum: Framebuilders
04-08-24, 08:17 PM
Replies: 13
Views: 569
Posted By VegasJen

I started watching the video but it didn't take...

I started watching the video but it didn't take long to figure out that is way, way more work than I would want or care to put into this thing. Hell, I'm talking about a $20 frame for a project...
Forum: Framebuilders
04-06-24, 08:55 PM
Replies: 9
Views: 432
Posted By Doug Fattic

i have some Reynolds D shaped fork blades and...

i have some Reynolds D shaped fork blades and matching crowns. They vary in rake and curve. In addition I have steerers from the same era. I got them with some of the framebuilding stuff I acquired...
Forum: Framebuilders
04-06-24, 07:58 AM
Replies: 13
Views: 569
Posted By Andrew R Stewart

Mike- I don't like AL's softness and crack...

Mike- I don't like AL's softness and crack propagation tendency. I don't like the increase of stiffness that is done to combat the fatigue limit problem. I don't like how one has to join it (rivets,...
Forum: Framebuilders
03-15-24, 03:48 PM
Replies: 8
Views: 640
Posted By Nessism

The TDS says you can reduce up to 15% with...

The TDS says you can reduce up to 15% with acetone for spraying. Clean-up with mineral spirits.

Rust-Oleum is Alkyd enamel. You can use hardner, to speed the cure time, and increase hardness. I...
Forum: Framebuilders
03-15-24, 03:03 PM
Replies: 4
Views: 474
Posted By Nessism

Spirit and Life both use the same OMNICROM alloy...

Spirit and Life both use the same OMNICROM alloy steel. The difference is in the shape, thickness, and butting configuration. It would be a mistake to think one or the other is "better".

As...
Forum: Framebuilders
03-06-24, 09:52 AM
Replies: 17
Views: 690
Posted By unterhausen

I think the failure of that fork Andy is talking...

I think the failure of that fork Andy is talking about can be traced back to drilling vent holes on the outside diameter of the crown segment. Those crown segments see a lot of fatigue cycles. They...
Forum: Framebuilders
03-05-24, 06:22 PM
Replies: 12
Views: 700
Posted By unterhausen

What PPE do you use? I probably should start...

What PPE do you use? I probably should start wearing a mask when I braze. When I search online for my asthma symptoms, they may actually be COPD symptoms. So brazing/welding is bad news.
Forum: Framebuilders
03-05-24, 10:23 AM
Replies: 12
Views: 700
Posted By unterhausen

It's going to be difficult to flow silver into...

It's going to be difficult to flow silver into there because you can't clean it properly. I have had luck with brass and dirty surfaces, but that takes a real torch. The problem with not having any...
Forum: Framebuilders
02-15-24, 09:01 AM
Replies: 3
Views: 302
Posted By unterhausen

There is always some blacksmithing involved in...

There is always some blacksmithing involved in getting fork blades into fork crowns. I might not even notice the difference. If there is a gap anywhere, you can bend the crown into compliance and...
Forum: Framebuilders
02-11-24, 01:42 PM
Replies: 6
Views: 371
Posted By bulgie

Ah right, sorry, you said "bike builder". I would...

Ah right, sorry, you said "bike builder". I would call that a bike assembler, but of course I am a framebuilder snob who looks down on anyone who doesn't build their own frames ;) <jk>
Forum: Framebuilders
02-10-24, 01:34 PM
Replies: 11
Views: 573
Posted By unterhausen

Side tack twin top tubes were pretty common on...

Side tack twin top tubes were pretty common on cruisers at one time. Look for pictures of a bike with a fake gas tank.
Forum: Framebuilders
01-18-24, 06:03 PM
Replies: 23
Views: 971
Posted By unterhausen

I watch car guys doing miters just to make myself...

I watch car guys doing miters just to make myself feel superior. Same with motorcycle guys brazing fillets.
Forum: Framebuilders
01-18-24, 01:57 PM
Replies: 23
Views: 971
Posted By bulgie

There's a youtuber who goes by something like The...

There's a youtuber who goes by something like The Fabricator. I watched his video on notching tubes, which he does for making roll cages for race cars. He notched with a flap wheel in an angle...
Forum: Framebuilders
01-17-24, 03:06 AM
Replies: 23
Views: 971
Posted By guy153

I still practice on all my drops :) And often use...

I still practice on all my drops :) And often use the ends of stays for bridge tubes. I just took the paint (it was powder coat) off with a "birds nest" wheel on a grinder which didn't take long.
Forum: Framebuilders
01-16-24, 02:42 PM
Replies: 23
Views: 971
Posted By Andrew R Stewart

Many of us did recycle old frames into practice...

Many of us did recycle old frames into practice material but the time it took to clean off the paint was taking away from the practice torch stuff time so speaking for myself I suggest raw tubing as...
Forum: Framebuilders
01-16-24, 01:59 PM
Replies: 21
Views: 987
Posted By unterhausen

I think you'll have to drop your rant, road...

I think you'll have to drop your rant, road racing outside of parking lot crits is dying in the U.S.

I see shops saying they can't sell low-end road bikes, just $5000 road bikes. That certainly...
Forum: Framebuilders
01-15-24, 09:08 PM
Replies: 21
Views: 987
Posted By bulgie

Even Reynolds used that old canard in their...

Even Reynolds used that old canard in their marketing materials for 753. Any engineers in the company probably winced, and/or hung their heads in shame.
Forum: Framebuilders
01-15-24, 07:48 PM
Replies: 43
Views: 2,496
Posted By bulgie

There's no level of small that my neighbors would...

There's no level of small that my neighbors would like. I'm in an urban neighborhood with postage-stamp sized lots. One neighbor is 10 feet from where I'd be hammering, in the driveway, since I...
Forum: Framebuilders
01-11-24, 10:03 AM
Replies: 14
Views: 2,000
Posted By Andrew R Stewart

I've done similar to what Paul shows, plastic...

I've done similar to what Paul shows, plastic sheeting walled in space for fume control. In my case it was for brazing smells though. I now have a casement window mounted exhaust fan (bought from...
Forum: Framebuilders
01-02-24, 01:18 PM
Replies: 48
Views: 2,754
Posted By PaulJensen

I have one at the moment… See above…!!!…

I have one at the moment… See above…!!!…
Forum: Framebuilders
01-02-24, 11:52 AM
Replies: 48
Views: 2,754
Posted By PaulJensen

Thanks for that… I’ve always been like that… ...

Thanks for that… I’ve always been like that…

Among other things, I’m also a surfboard builder… In 2001 I pioneered a method of building hollow wood surfboards that was ground-zero for all other...
Forum: Framebuilders
01-01-24, 08:07 PM
Replies: 11
Views: 676
Posted By The_Joe

I'm actually using a vintage Shimano seat post in...

I'm actually using a vintage Shimano seat post in very good condition so I'd rather not turn that down, as silly as.it sounds.

Either way, I was able to open the ears a bit and run a quick...
Forum: Framebuilders
12-31-23, 09:41 PM
Replies: 12
Views: 715
Posted By unterhausen

I really should trust bikecad a little more. The...

I really should trust bikecad a little more. The issue is setting up the dropouts is a total thesis on there, and my eyes just glaze over. That's why I'm building a stay/bb specific fixture so I...
Forum: Framebuilders
12-30-23, 06:14 PM
Replies: 11
Views: 676
Posted By 50PlusCycling

Rather than ream out the frame, I would machine...

Rather than ream out the frame, I would machine the 27.2 seat post down until it fits properly. Seat posts are more easily replaceable than frames.
Forum: Framebuilders
12-22-23, 07:31 AM
Replies: 11
Views: 676
Posted By Mark Beaver

I’ve had pretty good luck spreading the ears of a...

I’ve had pretty good luck spreading the ears of a seat lug that’s been compressed by folks using a too-small seatpost; by using a 1 1/8” ie 25.4 diameter quill stem, strategically locating it where...
Forum: Framebuilders
12-21-23, 06:26 PM
Replies: 11
Views: 676
Posted By bulgie

I strongly suggest trying to remove as little...

I strongly suggest trying to remove as little metal as possible. On a frame where the ears have been bent in from mounting a too-small post, you need to gently bend the ears outward befor reaming. I...
Forum: Framebuilders
12-21-23, 06:09 PM
Replies: 8
Views: 741
Posted By unterhausen

that's an impressive body of work. I'm glad you...

that's an impressive body of work. I'm glad you found a source that can make good parts.
Forum: Framebuilders
12-21-23, 06:05 PM
Replies: 11
Views: 676
Posted By unterhausen

You can get a telescoping gauge and check the...

You can get a telescoping gauge and check the dimension at various radial directions. It could well be pinched. I would try to fix that first. Can't fix it without measuring.

I suggest finding a...
Forum: Framebuilders
12-19-23, 06:29 PM
Replies: 10
Views: 851
Posted By unterhausen

From now on, respondents in this forum need to...

From now on, respondents in this forum need to rate the perceived danger of a modification/repair/design from 1 to "too dangerous for Mr. Bulgier."
Forum: Framebuilders
12-19-23, 08:25 AM
Replies: 10
Views: 851
Posted By Andrew R Stewart

This is one of those "I'd do it on my fork but...

This is one of those "I'd do it on my fork but not for a customer's fork" things. The worst case should be pretty obvious and one that we should all never be a part of for another. Andy
Forum: Framebuilders
12-18-23, 02:15 PM
Replies: 7
Views: 545
Posted By Mark Beaver

Idea 4 - fabricate a small aluminum plate that...

Idea 4 - fabricate a small aluminum plate that bolts to the two existing holes, and mount the light to that by drilling two new holes in the aluminum plate in the right places. I wouldn't drill...
Forum: Framebuilders
12-18-23, 01:38 PM
Replies: 7
Views: 545
Posted By unterhausen

It's extremely difficult to drill carbon without...

It's extremely difficult to drill carbon without damage. I was looking at some forks recently, and there were pads glued to the outside. That's what I would do if I couldn't figure out how to...
Forum: Framebuilders
12-18-23, 12:36 PM
Replies: 9
Views: 698
Posted By unterhausen

That looks really nice. I want a sander like...

That looks really nice. I want a sander like that, but I don't have any place to put it and I probably wouldn't use it. Nestor C. is doing good work with his, I assume most people here follow him...
Forum: Framebuilders
12-18-23, 06:36 AM
Replies: 9
Views: 698
Posted By dsaul

It is a shop built 2 x 48 belt grinder and you...

It is a shop built 2 x 48 belt grinder and you are correct that it can be flipped on its side for horizontal use. I got the plans from a YouTube video from Timwelds. There are some changes that I...
Forum: Framebuilders
12-17-23, 07:55 PM
Replies: 9
Views: 698
Posted By Doug Fattic

This would make an excellent separate subject...

This would make an excellent separate subject thread. I'd like to see other shop's as well. Seeing what tooling others have and how things are done could spark many other subject threads.
Forum: Framebuilders
12-17-23, 06:55 PM
Replies: 9
Views: 698
Posted By bulgie

I love your little knee mill. I used one of...

I love your little knee mill. I used one of those at work for 10 years, fond memories. Only have room for a benchtop mill now alas.

Is your belt grinder home-built? Am I seeing right, that it...
Forum: Framebuilders
12-16-23, 05:17 AM
Replies: 11
Views: 533
Posted By dsaul

It's not pretty, but it's certainly safe to ride....

It's not pretty, but it's certainly safe to ride. People bend stays way more than that on purpose.
Forum: Framebuilders
12-12-23, 09:15 AM
Replies: 32
Views: 1,576
Posted By Andrew R Stewart

When I was just beginning to learn frame building...

When I was just beginning to learn frame building the shop's owner had a GF who was also making her own frame (my kind of woman!) for her around the world tour. besides the frame bit I was curious...
Forum: Framebuilders
12-12-23, 04:11 AM
Replies: 32
Views: 1,576
Posted By guy153

There's a lot to be said for 26" on a touring...

There's a lot to be said for 26" on a touring bike anyway. Easier to get parts when riding across the Hindu Kush. The opposite is probably true of 650b. It also makes much more sense than 700c if...
Forum: Framebuilders
12-11-23, 06:42 PM
Replies: 32
Views: 1,576
Posted By unterhausen

There are enough 650b rim brake rims available...

There are enough 650b rim brake rims available that it's not going to be a problem for my lifetime. It's not even single source, Velocity and others make them. A lathe to cut the brake tracks is a...
Forum: Framebuilders
12-10-23, 10:24 AM
Replies: 32
Views: 1,576
Posted By guy153

When it comes to level TTs I quite like them all...

When it comes to level TTs I quite like them all things being equal, but I dislike excessive stickout of stems (or seatposts) even more. So my least favourite is the modern "road" frame with a really...
Forum: Framebuilders
11-15-23, 09:51 PM
Replies: 14
Views: 870
Posted By Andrew R Stewart

And I agree. My point was the understanding of...

And I agree. My point was the understanding of frame stiffness was understood by some long before the current hype. Even if their way of explaining it wasn't the best. Andy
Forum: Framebuilders
11-07-23, 04:25 PM
Replies: 6
Views: 740
Posted By unterhausen

They are just a curiosity at this point. For one...

They are just a curiosity at this point. For one thing, the seat stay attachment was so flimsy a lot of them broke.
Forum: Framebuilders
10-31-23, 05:53 PM
Replies: 4
Views: 611
Posted By Mark Beaver

Here’s my home-grown canti boss fixture. A...

Here’s my home-grown canti boss fixture. A length of steel angle “iron”, machined flat on one side, with a long slot. It’s fairly thick so quite substantial. I use a piece of stainless rack strut...
Forum: Framebuilders
10-12-23, 11:12 AM
Replies: 4
Views: 536
Posted By unterhausen

Framebuilder supply isn't going to have any,...

Framebuilder supply isn't going to have any, Gilco was before their time.

Only source most of the time is ebay. Someone is selling some right now.
https://www.ebay.com/itm/332025142126
Forum: Framebuilders
10-10-23, 04:27 AM
Replies: 8
Views: 450
Posted By dsaul

Unless they are socket style dropouts, you can...

Unless they are socket style dropouts, you can make a single angle dropout work for a wide range of angles between seat and chain stays. The tabs are generally wider than the stays and you can shape...
Forum: Framebuilders
10-07-23, 08:51 PM
Replies: 4
Views: 303
Posted By unterhausen

If you are getting it powder coated, I think I...

If you are getting it powder coated, I think I would replace them. I'm not convinced it doesn't cause problems. Maybe it doesn't cause any more problems than just using tektro brakes does. The ones...
Forum: Framebuilders
10-07-23, 05:23 PM
Replies: 4
Views: 303
Posted By Kontact

You like this frame that much?

You like this frame that much?
Showing results 1 to 50 of 345
 
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