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Search: Posts Made By: guy153
Showing results 1 to 11 of 11
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Forum: Framebuilders
01-30-20, 03:01 AM
Replies: 9
Views: 287
Posted By guy153

I don't think the angle at the top is an issue....

I don't think the angle at the top is an issue. Just weld or braze it up and it will be fine.

When you buy regular dropouts they don't make different ones for different seat stay angles. You want...
01-26-20, 02:18 PM
Replies: 66
Views: 2,167
Posted By guy153

Good question. In English the stress is either on...

Good question. In English the stress is either on the second to last syllable or the third to last, if the second to last is short (actually that's the rule for Latin, English is probably more...
01-04-20, 04:27 AM
Replies: 36
Views: 2,156
Posted By guy153

Yes indeed, although for bike frames you often...

Yes indeed, although for bike frames you often use a mild steel rod, which is a bit weaker but more ductile. A bit weaker is OK so long as you have a little bit of thickness in the fillet.


...
Forum: Touring
12-29-19, 02:30 PM
Replies: 14
Views: 945
Posted By guy153

The Garmin Oregon does all those things. Will run...

The Garmin Oregon does all those things. Will run all day on a freshly charged set of AA batteries, has an optional handlebar clip and is waterproof. They've added a bunch of fitness crap and other...
12-21-19, 01:08 PM
Replies: 113
Views: 6,092
Posted By guy153

The thickness looks about right. Cromoly bike...

The thickness looks about right. Cromoly bike tubes are usually 0.8mm or 0.9mm at the ends which that probably is. The ratio you might be talking about is 50:1 diameter to wall thickness which is a...
12-20-19, 03:05 PM
Replies: 113
Views: 6,092
Posted By guy153

I think you would still get those ripples. If you...

I think you would still get those ripples. If you just weld one bike tube to another and try to break it off there's usually lots of bending before anything breaks. Actually a good test would be to...
12-20-19, 02:21 PM
Replies: 113
Views: 6,092
Posted By guy153

It's generally considered that you don't need to...

It's generally considered that you don't need to preheat when making a bike frame because the material is so thin (although you do often preheat 4130 as you say).

Agree that it's the tube that's...
12-20-19, 04:07 AM
Replies: 113
Views: 6,092
Posted By guy153

The welds actually look really good and it's...

The welds actually look really good and it's failed in the heat affected zone just outside them with a very clean brittle fracture exactly the same on both tubes. There is some deformation of the...
12-17-19, 06:29 AM
Replies: 45
Views: 1,278
Posted By guy153

It's in compression on the major diameter but...

It's in compression on the major diameter but tension on the minor diameter. Either way it's a matter of when not if it breaks.
12-17-19, 03:10 AM
Replies: 45
Views: 1,278
Posted By guy153

I would avoid riding it except very carefully to...

I would avoid riding it except very carefully to the bike shop. If the front wheel goes there's a good chance of a fall as it's what you're using to stay upright.
Forum: Framebuilders
12-13-19, 10:22 AM
Replies: 394
Views: 239,697
Posted By guy153

Reynolds 631 road bike

https://cimg6.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1130/roadster_c135e9fa40f21e233cdeea6ca28236682bee7058.jpg...
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