"lugged steel" bike
08-04-21, 06:51 PM
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08-04-21, 08:20 PM
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A lugged steel bicycle frame is a steel bicycle frame where the tubes have been bonded using lugs.
There are many ways to bond tubes together. For example, on this frame...
...if you look at where the tubes come together, you can see that they're held together by welds.
Here are a pair of lugged frames:
If you look at the joint on the red frame in the center-left of the image, you can see that there's a sort of sleeve around the two tubes where they come together. That sleeve is a lug. In the manufacturing process, a tube is inserted into the lug, and then tube and lug are brazed together.
There are many ways to bond tubes together. For example, on this frame...
...if you look at where the tubes come together, you can see that they're held together by welds.
Here are a pair of lugged frames:
If you look at the joint on the red frame in the center-left of the image, you can see that there's a sort of sleeve around the two tubes where they come together. That sleeve is a lug. In the manufacturing process, a tube is inserted into the lug, and then tube and lug are brazed together.
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08-04-21, 08:48 PM
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There are a number of different methods that were used to bond steel tubes together over the years.
"Lugged" used a preformed lug. Often pressed steel, but more recently cast steel. That the tubes were inserted into and bazed. With "double butted" tubing (thicker at the ends), it was once considered one of the strongest bonds (and usually ornately decorated).
Here is a recent post about filet brazing. Tubes were cut to fit tightly, then brazed with an extra rounded filet to give extra strength.
Schwinn also did electroforging where the tubes were pressed together, then with electricity, heated and welded, in a single quick step.
I have a Dutchess where I think the ends of the tubes were folded over and spot welded.
As metals and techniques got better, the frames started being TIG welded.
"Lugged" used a preformed lug. Often pressed steel, but more recently cast steel. That the tubes were inserted into and bazed. With "double butted" tubing (thicker at the ends), it was once considered one of the strongest bonds (and usually ornately decorated).
Here is a recent post about filet brazing. Tubes were cut to fit tightly, then brazed with an extra rounded filet to give extra strength.
Schwinn also did electroforging where the tubes were pressed together, then with electricity, heated and welded, in a single quick step.
I have a Dutchess where I think the ends of the tubes were folded over and spot welded.
As metals and techniques got better, the frames started being TIG welded.
08-04-21, 11:48 PM
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A big advertised as a "lugged steel bicycle" will be made of steel (often times different quality levels of tubing) and the steel tubes will be joined using visible lug work. There are internally lugged steel bikes also but the term used usually means that you will see something like this (externally lugged), the black parts being the lugs (can be fancy or plain)...
Lugs are found at the head tube intersections and the seat tube intersections. The fork crown can also be thought of as a lug...
Lugs are found at the head tube intersections and the seat tube intersections. The fork crown can also be thought of as a lug...
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08-05-21, 12:04 AM
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08-05-21, 05:58 AM
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Google may work to get answers, but I’d rather ask questions here and get a bit more meaningful replies.
Last edited by Swampthing; 08-05-21 at 06:16 AM.
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08-05-21, 06:15 AM
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And what is a wheel?
Seems a little obvious.
Although ... I remember once being at a pizza place in my twenties with my gf, meeting her parents for the first time. Guess I was a little nervous. I was looking at the menu's list of toppings, and I asked her under my breath, "what is harn?" I was a little dumbfounded. I had never heard of harn before. Turned out to be ham.
Seems a little obvious.
Although ... I remember once being at a pizza place in my twenties with my gf, meeting her parents for the first time. Guess I was a little nervous. I was looking at the menu's list of toppings, and I asked her under my breath, "what is harn?" I was a little dumbfounded. I had never heard of harn before. Turned out to be ham.
08-05-21, 06:20 AM
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SurferRosa , I guess that there was no harn in asking.
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08-05-21, 06:34 AM
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A steel lugged bike is a functional work of art. It is crafted by a mechanical artist, forged with the fires of conviction, infused with the souls of courageous riders of days past, cooled with the joyful tears of angels.
Except for Hi-Ten bikes. Those things are crap.
Except for Hi-Ten bikes. Those things are crap.
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08-05-21, 07:29 AM
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While one might venture to say that a "lugged steel" bike is a bicycle frame made out of steel tubes joined by steel lugs, I say it's a dream a small child had and, despite numerous hurdles, said child was able to overcome these challenges and grow into a fully formed Grant Petersen.
08-05-21, 07:52 AM
#13
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Bicycle-related near-homonyms that may be of interest:
- bugged steel - the result of a summer night ride through northern Georgia
- mugged steel - take your bike through south Chicago at any time of the day or night
- chugged steel - another name for a pub crawl, obviously
- slugged steel - small independent fabricators from Louisville, KY
- tugged steel - moved into and out of busy harbors, through large canals
- fugged steel - "that crinkle in the top tube...it's just patina."
- bugged steel - the result of a summer night ride through northern Georgia
- mugged steel - take your bike through south Chicago at any time of the day or night
- chugged steel - another name for a pub crawl, obviously
- slugged steel - small independent fabricators from Louisville, KY
- tugged steel - moved into and out of busy harbors, through large canals
- fugged steel - "that crinkle in the top tube...it's just patina."
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08-05-21, 08:37 AM
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Bicycle-related near-homonyms that may be of interest:
- bugged steel - the result of a summer night ride through northern Georgia
- mugged steel - take your bike through south Chicago at any time of the day or night
- chugged steel - another name for a pub crawl, obviously
- slugged steel - small independent fabricators from Louisville, KY
- tugged steel - moved into and out of busy harbors, through large canals
- fugged steel - "that crinkle in the top tube...it's just patina."
- bugged steel - the result of a summer night ride through northern Georgia
- mugged steel - take your bike through south Chicago at any time of the day or night
- chugged steel - another name for a pub crawl, obviously
- slugged steel - small independent fabricators from Louisville, KY
- tugged steel - moved into and out of busy harbors, through large canals
- fugged steel - "that crinkle in the top tube...it's just patina."
--shrugged steel - for those who really just don't care
--hugged steel -- for those with a special relationship with their bicycles (ref: see Rivendell owners)
--rugged steel -- for those who smoke Marlboro unfiltered
--ugged steel -- for those fond of a particularly trendy footwear
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08-05-21, 08:53 AM
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And what is a wheel?
Seems a little obvious.
Although ... I remember once being at a pizza place in my twenties with my gf, meeting her parents for the first time. Guess I was a little nervous. I was looking at the menu's list of toppings, and I asked her under my breath, "what is harn?" I was a little dumbfounded. I had never heard of harn before. Turned out to be ham.
Seems a little obvious.
Although ... I remember once being at a pizza place in my twenties with my gf, meeting her parents for the first time. Guess I was a little nervous. I was looking at the menu's list of toppings, and I asked her under my breath, "what is harn?" I was a little dumbfounded. I had never heard of harn before. Turned out to be ham.
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08-05-21, 08:53 AM
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08-05-21, 08:54 AM
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I'll play...
--drugged steel - for those who prefer their performance enhancements in chemical form (e.g. manganese, chromium, molybdenum, etc)
--plugged steel - what might happen if those south Chicago muggers are armed.
--drugged steel - for those who prefer their performance enhancements in chemical form (e.g. manganese, chromium, molybdenum, etc)
--plugged steel - what might happen if those south Chicago muggers are armed.
08-05-21, 09:23 AM
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