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Search: Posts Made By: guy153
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Forum: Framebuilders
10-01-22, 02:24 AM
Replies: 3
Views: 209
Posted By guy153

I'm pretty sure you can weld T45 to CrMo no...

I'm pretty sure you can weld T45 to CrMo no problem. They're both high strength low alloy steels. T45 has a bit more Manganese, but so does Reynolds 631, and you can weld that to CrMo just fine....
Forum: Framebuilders
09-27-22, 03:52 PM
Replies: 11
Views: 273
Posted By guy153

Repair it with your torch while the paint's off :)

Repair it with your torch while the paint's off :)
Forum: Framebuilders
09-22-22, 04:29 AM
Replies: 14
Views: 434
Posted By guy153

TIG is always better. My point was just on this...

TIG is always better. My point was just on this fork you could get away with MIG (or even flux core) if it was all you had.
Forum: Framebuilders
09-20-22, 09:40 AM
Replies: 14
Views: 434
Posted By guy153

The heat wouldn't do anything special-- mild...

The heat wouldn't do anything special-- mild steel is basically the same before and after you weld it. But if you're adding metal you're adding strength. So yes if you just filled it all in and...
Forum: Framebuilders
09-20-22, 08:08 AM
Replies: 14
Views: 434
Posted By guy153

Hi-Ten is basically mild steel, so you could just...

Hi-Ten is basically mild steel, so you could just weld it-- you can weld Cromoly obviously as well but you have to think about heat cycles and things a bit more, and because it's thinner you really...
Forum: Framebuilders
09-20-22, 01:53 AM
Replies: 14
Views: 434
Posted By guy153

As for theories about how it happened, maybe...

As for theories about how it happened, maybe there was a light bracket or something on there with a poorly-designed clip that was very enthusiastically tightened by somebody. If it was on the frame...
Forum: Framebuilders
09-16-22, 02:11 AM
Replies: 4
Views: 323
Posted By guy153

At your size and weight I would go traditional...

At your size and weight I would go traditional "single oversize" (so 1 1/4" DT, 1 1/8" TT), with wall thickness around 0.8/0.5/0.8 which would be Zona. Cromor would also be fine-- it's usually...
Forum: Framebuilders
09-15-22, 01:47 AM
Replies: 14
Views: 409
Posted By guy153

A reason I do like them on the HT though is the...

A reason I do like them on the HT though is the cables don't rub the paint on the sides of the HT. I always put them on the DT though and now put helitape underneath where they rub. I had never heard...
Forum: Framebuilders
09-14-22, 01:06 AM
Replies: 14
Views: 409
Posted By guy153

I think adaptors over the DT bosses actually work...

I think adaptors over the DT bosses actually work better. If they seize up you have more options. You can also run with DT shifters or barcons in the future when Shimano have switched everything to...
Forum: Framebuilders
09-13-22, 01:33 AM
Replies: 24
Views: 652
Posted By guy153

For a table you need stiffness, which usually...

For a table you need stiffness, which usually means some bracing about 3/4 of the way down the legs. Then the design challenge is for it not to get in the way of people's feet. I tried heated boiled...
Forum: Framebuilders
09-12-22, 11:07 AM
Replies: 24
Views: 652
Posted By guy153

Yes you could start a tubing company. But there...

Yes you could start a tubing company. But there probably isn't much point without owning an existing brand.

You can't make these tubes into furniture! Make some frames or give them away/sell them....
Forum: Framebuilders
09-12-22, 03:03 AM
Replies: 24
Views: 652
Posted By guy153

My guess is that all they're doing now is the...

My guess is that all they're doing now is the final few cold-drawing and butting steps, which is done on a machine not much bigger than a large lathe, and perhaps some heat-treating. They buy in some...
Forum: Framebuilders
09-11-22, 03:58 AM
Replies: 24
Views: 652
Posted By guy153

Looking at that catalogue it says all Dedacciai...

Looking at that catalogue it says all Dedacciai tubing is seamless cromoly (25CrMo4 is the European standard equivalent to 4130). So it's all good, and basically equivalent to anything from Columbus...
Forum: Framebuilders
09-07-22, 03:13 PM
09-07-22, 01:54 AM
Replies: 55
Views: 1,542
Posted By guy153

If you're stopping at a junction or have to wait...

If you're stopping at a junction or have to wait for a bit then it's quite convenient to be able to just stand with both feet flat on the ground. Not a huge thing but there's no good reason not to...
Forum: Framebuilders
09-06-22, 12:28 PM
Replies: 32
Views: 912
Posted By guy153

Mine is an "R-Tech" which is the UK version of...

Mine is an "R-Tech" which is the UK version of what's branded "Everlast" in US. Chinese but reasonably good. The solenoid failed and they sent me a warranty replacement. The display just shows random...
Forum: Framebuilders
09-06-22, 02:16 AM
Replies: 32
Views: 912
Posted By guy153

Get a welder. But the AC/DC ones are quite a bit...

Get a welder. But the AC/DC ones are quite a bit more expensive. For steel (or Ti) frames you only need the cheapest DC-only machine because you don't need a lot of current. But you do need a foot...
Forum: Framebuilders
09-05-22, 01:51 AM
Replies: 32
Views: 912
Posted By guy153

Are you sure, it doesn't look aluminium, and they...

Are you sure, it doesn't look aluminium, and they usually have replaceable hangers? He might just be referring to some other frame in some other thread.

Even if it is it could be TIGed (and of...
Forum: Framebuilders
08-25-22, 03:15 PM
Replies: 6
Views: 347
Posted By guy153

Making the tube stiffer at a point of high stress...

Making the tube stiffer at a point of high stress isn't necessarily a good idea-- making it stronger there might be but they're different things. I think Ti is a lot harder to form seamlessly than...
08-23-22, 08:55 AM
Replies: 55
Views: 1,542
Posted By guy153

You do need enough standover to be able to...

You do need enough standover to be able to literally stand over the frame when stopping at a red light or to wait for someone to catch up etc. OK you don't absolutely need this but it's quite...
08-22-22, 01:55 AM
Replies: 55
Views: 1,542
Posted By guy153

It may also have some relevance when it comes to...

It may also have some relevance when it comes to riding out of the saddle. You can have any ST angle you like until it's basically horizontal and you're riding a recumbent. But at some point standing...
08-21-22, 12:10 PM
Replies: 55
Views: 1,542
Posted By guy153

On a touring bike you usually want a relatively...

On a touring bike you usually want a relatively upright position which means a slack ST angle is best. 76° sounds far too steep. Your framebuilder should have discussed this with you and/or tried you...
08-21-22, 11:58 AM
Replies: 35
Views: 1,083
Posted By guy153

I reuse them, seems to be OK. 10 speed is the...

I reuse them, seems to be OK. 10 speed is the newest fangled on any of my bikes though. The 9 speed ones you were officially allowed to reuse.
Forum: Framebuilders
08-17-22, 12:49 AM
Replies: 27
Views: 1,174
Posted By guy153

Tack a piece of wire a few inches long (1mm...

Tack a piece of wire a few inches long (1mm welding rod would be a good choice) to the centre of the mesh (before inserting it into the frame). Put a loop in the top of the wire and tie string to...
Forum: Framebuilders
08-17-22, 12:40 AM
Replies: 6
Views: 419
Posted By guy153

Yes as others have said they should just drop...

Yes as others have said they should just drop off. But if you don't own that kind of torch very carefully grind them and then sand or file the last bit by hand. If you were filling a hole then yes...
Forum: Framebuilders
08-08-22, 03:33 PM
Replies: 2
Views: 317
Posted By guy153

Easy enough to add a bridge tube. You could also...

Easy enough to add a bridge tube. You could also perfectly well make a sort of clamp that would bolt on-- it's all in compression anyway. But it would probably look a bit ugly. As for painting well...
Forum: Framebuilders
08-08-22, 05:46 AM
Replies: 21
Views: 1,366
Posted By guy153

Yes I also used them because I saw them on ETOE....

Yes I also used them because I saw them on ETOE. Idk if he's sponsored or anything. But they seem to be pretty good.
Forum: Framebuilders
08-08-22, 01:25 AM
Replies: 21
Views: 1,366
Posted By guy153

Interesting you say that. I painted another...

Interesting you say that. I painted another project (not a bike) with white Montana Gold. I think was "Shock White". Also very lumpy. It even blocked the nozzle and I had to use one off another can.
Forum: Framebuilders
08-05-22, 10:47 AM
Replies: 7
Views: 667
Posted By guy153

Yes this is a good point about the externally...

Yes this is a good point about the externally butted ST and thicker HT. The external butt on Columbus STs is 40mm long and adds 1.2mm of wall. I make that 33.9g. Assuming an HT that's 160mm long and...
Forum: Framebuilders
08-05-22, 01:45 AM
Replies: 7
Views: 667
Posted By guy153

I know we could all easily lose more weight just...

I know we could all easily lose more weight just by going easy on the donuts etc. etc. but does anyone know roughly how much a set of lugs weighs? I'm just curious about it in the name of science.
Forum: Framebuilders
07-31-22, 03:18 AM
Replies: 21
Views: 1,366
Posted By guy153

Yes Montana Gold is acrylic. Doug Fattic knows...

Yes Montana Gold is acrylic. Doug Fattic knows much more about these things than I do. But the Montana stuff goes on well compared to spray.bike (also acrylic) which can leave a lot of powder lying...
Forum: Framebuilders
07-28-22, 03:25 PM
Replies: 27
Views: 1,174
Posted By guy153

Epoxy sounds like a good option as the holes are...

Epoxy sounds like a good option as the holes are "non-structural". Otherwise I would cut a piece of sheet metal to fit in the hole as they are quite large and then TIG braze it in, a bit below the...
Forum: Framebuilders
07-20-22, 03:40 AM
Replies: 25
Views: 1,221
Posted By guy153

Yes agree with duanedr about replacing the rear...

Yes agree with duanedr about replacing the rear triangle. The top of the ST is probably 1.2mm wall if it's externally butted which should be OK to weld to again. You could also salvage the dropouts...
Forum: Framebuilders
07-19-22, 02:37 AM
Replies: 21
Views: 1,366
Posted By guy153

I recommend 2k clear as well. Andy is probably...

I recommend 2k clear as well. Andy is probably right that it's only a bit tougher, but it's like puncture-resistant tyres: enough is as good as a feast. Spray.bike with its own clear coat gets...
Forum: Framebuilders
07-19-22, 02:27 AM
Replies: 8
Views: 667
Posted By guy153

Do you have any bikes you are riding at the...

Do you have any bikes you are riding at the moment that feel sort of about right or a bit too small? It might be worth taking some measurements off them to get you in the right ballpark. For a road...
Forum: Framebuilders
07-19-22, 02:10 AM
Replies: 13
Views: 911
Posted By guy153

I know I'm pretty rustic compared to you guys but...

I know I'm pretty rustic compared to you guys but I use an angle-grinder for everything including cutting slits like that. I make seatpost binder bolts on my minilathe, braze them on, and then cut...
Forum: Framebuilders
06-28-22, 03:53 PM
Replies: 13
Views: 911
Posted By guy153

Nice work! I'm going to link my conversion of a...

Nice work! I'm going to link my conversion of a quill stem to threadless :)

https://www.bikeforums.net/framebuilders/1221885-threadless-stem-conversion.html
Forum: Framebuilders
06-28-22, 04:31 AM
Replies: 33
Views: 2,008
Posted By guy153

If you'd kept those domed stays you could be...

If you'd kept those domed stays you could be selling them off now probably at a profit. I wonder if Reynolds still have the machine they used to make them.
Forum: Framebuilders
06-21-22, 07:48 AM
Replies: 457
Views: 290,666
Posted By guy153

Ah if you filled in those spots that should be...

Ah if you filled in those spots that should be fine. Yes burn-back on the "ears" when the tubes are similar sizes can be very tricky. I sometimes do a trick I saw on Justin Voss's YT channel which is...
Forum: Framebuilders
06-21-22, 03:41 AM
Replies: 457
Views: 290,666
Posted By guy153

Well done for tackling Ti! Welds don't have to be...

Well done for tackling Ti! Welds don't have to be the perfect stacks of dimes (although of course we'd all like that ngl). I'd be a bit more concerned about the places where it looks a bit like you...
Forum: Framebuilders
06-21-22, 03:25 AM
Replies: 21
Views: 1,437
Posted By guy153

I'm in UK and Trek replaced a failed frame for me...

I'm in UK and Trek replaced a failed frame for me under the lifetime warranty with no quibbles. The warranty only applies to the first owner (and I've now ebayed that frame since making my own...
Forum: Framebuilders
06-05-22, 11:42 AM
Replies: 18
Views: 1,293
Posted By guy153

Yes use car body filler. If you're painting the...

Yes use car body filler. If you're painting the whole frame I usually use Montana Gold acrylic, Montana Gold steel primer and glossy 2K clear. Actually a pretty decent finish. Leave the acrylic to...
Forum: Framebuilders
06-05-22, 11:30 AM
Replies: 8
Views: 1,005
Posted By guy153

Butting isn't just to save weight but to take...

Butting isn't just to save weight but to take stress away from the joints. It probably affects the feel of the ride as well. I don't know of a reason other than cost to only use single butting.
Forum: Framebuilders
05-25-22, 05:39 AM
Replies: 21
Views: 1,437
Posted By guy153

I'm not sure that kind of aluminium brazing has...

I'm not sure that kind of aluminium brazing has much strength. It really needs a TIG weld.
Forum: Framebuilders
05-16-22, 09:31 AM
Replies: 6
Views: 809
Posted By guy153

I don't know what the official size is but I...

I don't know what the official size is but I measured it to be 253.5mm for 26", and used this on a frame. The brakes fit fine. But I would also be interested to have a proper chart.
Forum: Framebuilders
05-16-22, 02:05 AM
Replies: 14
Views: 1,105
Posted By guy153

I did that on my (so far) one disk fork. Worked...

I did that on my (so far) one disk fork. Worked for me (TIG tacking). So many ways to screw things up with all the different standards out there it's quite nice to work with the actual caliper and...
Forum: Framebuilders
05-04-22, 01:36 AM
Replies: 6
Views: 957
Posted By guy153

Yes go for it :) When I say a bit of brass, I...

Yes go for it :) When I say a bit of brass, I mean I would use TIG silicon bronze, just as a kind of filler, after welding the crack with a steel rod. You could skip the brass though-- it isn't...
Forum: Framebuilders
05-03-22, 01:33 AM
Replies: 6
Views: 957
Posted By guy153

I would happily repair it but I'm in the UK which...

I would happily repair it but I'm in the UK which would likely be excessively expensive for shipping. It just needs a TIG weld, a bit of brass, a sliver of car body filler, some similar paint, and...
05-02-22, 06:45 AM
Replies: 66
Views: 2,269
Posted By guy153

Agree with everyone who said it was because...

Agree with everyone who said it was because frames weren't always built that well so it gave you a bit of "wiggle room". I have also seen it claimed that people used to run a fixed gear for winter...
04-25-22, 02:43 AM
Replies: 8
Views: 345
Posted By guy153

Yes I have observed this after being too lazy to...

Yes I have observed this after being too lazy to change the cassette sometimes :) You can also just not use your favourite gear. I used to use the ruler method but the chain checker is much easier...
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