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Search: Posts Made By: guy153
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Forum: Framebuilders
07-02-20, 02:35 PM
Replies: 36
Views: 880
Posted By guy153

​​​You need something that's compatible with the...

​​​You need something that's compatible with the chainset and cranks is the thing. Bottom bracket shells from bicycle tubing suppliers don't cost very much and you can get a threaded one (for much...
Forum: Framebuilders
07-01-20, 07:43 AM
Replies: 8
Views: 194
Posted By guy153

That's interesting. The only ones I offset are...

That's interesting. The only ones I offset are the seatstays where they join the ST, otherwise they would intersect each other. Never thought about offsetting chainstays or or the ST to BB.
Forum: Framebuilders
06-28-20, 02:22 AM
Replies: 36
Views: 880
Posted By guy153

Looks good! 60lbs is a reasonable weight I think....

Looks good! 60lbs is a reasonable weight I think. Can you get angle iron and flat iron that thin? I can only get those down to 3mm as it's all "hot-rolled". My only concern would be the two long bits...
Forum: Framebuilders
06-27-20, 03:39 AM
Replies: 12
Views: 369
Posted By guy153

This is a simple jig I made for hand-mitring. You...

This is a simple jig I made for hand-mitring. You set the angle you want by lying one arm flat on the table and using a digital angle finder box. Then you tighten that nut (the bolt is welded on the...
06-25-20, 02:36 AM
Replies: 24
Views: 824
Posted By guy153

They usually last a bit longer than that. I get a...

They usually last a bit longer than that. I get a few thousand km out of a chain and a cassette lasts three or four chains or so. I don't do a great deal of maintenance (each chain gets properly...
Forum: Framebuilders
06-25-20, 02:09 AM
Replies: 38
Views: 1,469
Posted By guy153

How about just build up the actual dropouts with...

How about just build up the actual dropouts with weld and then grind/file it to whatever shape you need for a good insertion? The dropouts are nice and thick and can take plenty of heat. And if you...
Forum: Framebuilders
06-23-20, 09:51 AM
Replies: 12
Views: 495
Posted By guy153

From the videos so far it doesn't look like Paul...

From the videos so far it doesn't look like Paul Brodie even owns my most used tool-- the humble angle grinder!

I like complete build series the most but tips and tricks videos are also good.
Forum: Framebuilders
06-22-20, 01:32 AM
Replies: 12
Views: 495
Posted By guy153

It's my new favourite YouTube channel....

It's my new favourite YouTube channel. Super-stoked to see this e-bike build. Outstanding camera work and editing as well by the way.
Forum: Framebuilders
06-21-20, 10:08 AM
Replies: 9
Views: 342
Posted By guy153

I just use a bird's nest wheel on a grinder....

I just use a bird's nest wheel on a grinder. Removes powder coat or any sort of paint in seconds but no metal.

I usually get these ones:
...
Forum: Framebuilders
06-21-20, 02:05 AM
Replies: 36
Views: 880
Posted By guy153

Two rails of 1x2 on edge (1/16 in wall) and then...

Two rails of 1x2 on edge (1/16 in wall) and then a few lighter cross-pieces (which you can attach seats and things to) should work well. This is how people make hot-rods (they use thicker wall but...
Forum: Framebuilders
06-20-20, 01:58 PM
Replies: 36
Views: 880
Posted By guy153

Yes suspension is good. But it will increase the...

Yes suspension is good. But it will increase the budget quite a bit because the springs and shocks and things are all a bit pricey. I would go with 1/16" wall mild steel tubing which will be strong...
Forum: Framebuilders
06-20-20, 01:52 PM
Replies: 12
Views: 495
Posted By guy153

Binge watch all of them, well worth it. The way...

Binge watch all of them, well worth it. The way he makes that coffee table is particularly interesting. He machines all the parts so they're perfect and then just welds them together without...
Forum: Framebuilders
06-20-20, 02:20 AM
Replies: 36
Views: 880
Posted By guy153

Tubing is usually better for a lightweight...

Tubing is usually better for a lightweight structure than flat bar or angle iron because it's so much better in torsion. The thinnest flat bar or angle you (normally) get here in the UK is 3mm...
Forum: Framebuilders
06-19-20, 07:38 AM
Replies: 36
Views: 880
Posted By guy153

How thick are your 16-gauge and 18-gauge? I think...

How thick are your 16-gauge and 18-gauge? I think American gauges may be different than UK ones (in the UK 16 gauge is about 1/16")
Forum: Framebuilders
06-19-20, 02:15 AM
Replies: 36
Views: 880
Posted By guy153

A project like this is in many ways easier to...

A project like this is in many ways easier to build than a regular bike frame. Thicker tubing is easier to weld. If it's mild steel you can hack it, bash it, reweld it, have lousy fitup, and make it...
Forum: Framebuilders
06-19-20, 02:03 AM
Replies: 36
Views: 880
Posted By guy153

Yes easily. To give you the ball-park, CroMo...

Yes easily. To give you the ball-park, CroMo tubes are about 560MPa ultimate tensile strength and mild steel is about 400MPa-- so more than half. 0.8mm wall (which is about 1/32") CrMo is commonly...
Forum: Framebuilders
06-18-20, 01:49 PM
Replies: 36
Views: 880
Posted By guy153

I would go with 1/16" wall if it's just mild...

I would go with 1/16" wall if it's just mild steel (and even less if it's cromoly, but cromoly is much more expensive).
Forum: Framebuilders
06-18-20, 01:46 PM
Replies: 8
Views: 237
Posted By guy153

I was welding it and it did go a little bit oval...

I was welding it and it did go a little bit oval but still averaged out to the right size and the cups went in fine. I was quite pleased because I only have a proper reamer for EC30 and was planning...
Forum: Framebuilders
06-18-20, 11:13 AM
Replies: 8
Views: 237
Posted By guy153

On the last frame but one I built I used a...

On the last frame but one I built I used a Reynolds 631 headtube with a 34mm ID for the usual 11/8 headset. It was supplied at the exact right size and didn't really need reaming. I sort of skimmed...
06-17-20, 01:40 PM
Replies: 10
Views: 500
Posted By guy153

I like the Sheldon Brown instructions but worth...

I like the Sheldon Brown instructions but worth watching this:

https://youtu.be/XUqul03hbZ8

Full disclosure I haven't watched it myself yet but intend to. Even though I have built many wheels...
Forum: Framebuilders
06-11-20, 02:39 AM
Replies: 21
Views: 552
Posted By guy153

I think you just buy a cast crown with a bit of...

I think you just buy a cast crown with a bit of an angle built into. Then the blades go straight in.

See: http://ceeway.com/NEWPARTSPAGES/Cast%20Fork%20Crowns.htm. A few of those have a 7 degree...
Forum: Framebuilders
06-05-20, 10:26 AM
Replies: 19
Views: 741
Posted By guy153

That's what I was thinking as soon as he started...

That's what I was thinking as soon as he started talking about machining plastic collars to go inside the seat tube :)

You could actually make an awesome pump like this. Rather than use the...
Forum: Framebuilders
05-29-20, 02:56 PM
Replies: 31
Views: 1,083
Posted By guy153

Facing the shell won't make a significant...

Facing the shell won't make a significant difference to the head angle. Headsets often differ in their lower stack height by quite a bit anyway. A 10mm difference (which is a lot) might be half a...
Forum: Framebuilders
05-16-20, 02:23 AM
Replies: 8
Views: 642
Posted By guy153

I think it's up to the builder. When I bought...

I think it's up to the builder. When I bought some 631 main tubes and 525 stays they included a "631 Main Tubes" sticker so I stuck that on. But a big manufacturer is going to have a whole box of...
Forum: Framebuilders
05-13-20, 02:53 AM
Replies: 14
Views: 812
Posted By guy153

Silicon bronze is the stuff you want. Make sure...

Silicon bronze is the stuff you want. Make sure it's a TIG rod and not one meant for a gas torch. If it's the latter it will fry and spit and try to poison you with fumes.

I use 1/16 tungsten but...
Forum: Framebuilders
05-12-20, 03:06 PM
Replies: 12
Views: 622
Posted By guy153

I wouldn't bother with JB Weld. If it looks all...

I wouldn't bother with JB Weld. If it looks all right after the paint is off use car body filler, sand it smooth and get some paint on. It's right by the crank so a less than perfect paint job will...
Forum: Framebuilders
05-12-20, 03:00 PM
Replies: 14
Views: 812
Posted By guy153

The rod I use is called Sifsilcopper 968. Its...

The rod I use is called Sifsilcopper 968. Its quoted UTS is 350MPa, not far off the 500MPa of a regular mild steel rod that you would normally use for welding. I think the torch brazing rods like...
Forum: Framebuilders
05-11-20, 09:42 AM
Replies: 12
Views: 622
Posted By guy153

No. Not sure what that is. I meant the gashes...

No. Not sure what that is. I meant the gashes just to the left of it. I'd take the paint off and see what's what. If you can actually see daylight through it then it's much more compromised.
Forum: Framebuilders
05-11-20, 05:14 AM
Replies: 12
Views: 622
Posted By guy153

The biggest concern is the apparent crack over...

The biggest concern is the apparent crack over towards the right. Is it just a crack in the primer though? It looks like there's metal behind it. You will get a better idea if you clean some of the...
Forum: Framebuilders
05-11-20, 02:55 AM
Replies: 14
Views: 812
Posted By guy153

Yes I can't be sure how good the fatigue life is...

Yes I can't be sure how good the fatigue life is going to be without just riding the bikes and keeping an eye on them and trying to stick to the textbook for how to do a decent weld. Frame #00001...
Forum: Framebuilders
05-10-20, 01:35 PM
Replies: 14
Views: 812
Posted By guy153

I know, I'm not a big fan of of them. But the...

I know, I'm not a big fan of of them. But the friend it's for is doing me the favour of letting me build him a bike so I can't argue too much.

​​​​It is a good challenge in that you really have to...
Forum: Framebuilders
05-10-20, 01:29 PM
Replies: 14
Views: 812
Posted By guy153

If you get that Instagram-worthy stack then yes...

If you get that Instagram-worthy stack then yes otherwise you always have the option of filing :)

Although actually if you are intending to file it's better to shove a bit of extra rod in and...
Forum: Framebuilders
05-10-20, 02:06 AM
Replies: 14
Views: 812
Posted By guy153

I'm TIG brazing with silicon bronze over TIG...

I'm TIG brazing with silicon bronze over TIG welds on steel for a project I'm working on now where he wants a "raw" finish. I'm going for the look of a fillet brazed frame, but I only have/know how...
05-10-20, 01:53 AM
Replies: 54
Views: 2,410
Posted By guy153

Nice bikes!

Nice bikes!
Forum: Touring
05-09-20, 03:49 AM
Replies: 72
Views: 4,350
Posted By guy153

I guess there's an argument for saying you want...

I guess there's an argument for saying you want whatever the bike shops where you're going are likely to have spares for in case you need them. So nothing too ancient or too cutting-edge.
Forum: Framebuilders
05-09-20, 03:35 AM
Replies: 28
Views: 1,392
Posted By guy153

So the idea is that because the caliper is all...

So the idea is that because the caliper is all that way further down there's more torque on the steerer?
05-07-20, 11:12 AM
Replies: 54
Views: 2,410
Posted By guy153

The first oversized aluminium Cannondales that...

The first oversized aluminium Cannondales that appeared around the early 90s or so were really oversized, or maybe it's just that we weren't used to that look, but they had regular skinny steel forks...
Forum: Framebuilders
05-05-20, 07:06 AM
Replies: 50
Views: 5,726
Posted By guy153

Looks amazing! I think you've also played to the...

Looks amazing! I think you've also played to the strengths of spray.bike with a colour scheme that looks good in a matt/satin finish which is basically what spray.bike gives you. I think that's why...
Forum: Framebuilders
05-04-20, 01:14 PM
Replies: 50
Views: 5,726
Posted By guy153

Very wise :) Not sure whether it's best to wait...

Very wise :) Not sure whether it's best to wait for the paint to dry completely before putting the clear on or only about 20 minutes.

The thing to watch out for with the clear is the solvent in...
Forum: Framebuilders
05-04-20, 01:07 PM
Replies: 10
Views: 635
Posted By guy153

You're right I did completely not see that crease.

You're right I did completely not see that crease.
Forum: Framebuilders
05-04-20, 06:56 AM
Replies: 50
Views: 5,726
Posted By guy153

Durability is improved a bit by putting the...

Durability is improved a bit by putting the spray.bike clearcoat on which gives a bit more of a satin finish. It's nothing like as durable as powdercoat, but you can keep the can around and just...
Forum: Framebuilders
05-04-20, 06:50 AM
Replies: 10
Views: 635
Posted By guy153

So long as there are no holes or cracks I think...

So long as there are no holes or cracks I think it will probably be all right. People put bigger dimples than that into the chainstays on purpose. If it's for your own use could even repair it...
Forum: Framebuilders
05-04-20, 04:09 AM
Replies: 15
Views: 767
Posted By guy153

I agree with Andy Stewart better to remove the HT...

I agree with Andy Stewart better to remove the HT altogether. But why not instead make a new fork for it? Give the fork enough offset to get your trail back where you want it. Then the existing fork...
Forum: Framebuilders
05-01-20, 09:22 AM
Replies: 410
Views: 248,356
Posted By guy153

So is it 1 1/8 TT and also 1 1/8 DT?

So is it 1 1/8 TT and also 1 1/8 DT?
05-01-20, 01:18 AM
Replies: 162
Views: 10,703
Posted By guy153

531 is still available, but it's not used much...

531 is still available, but it's not used much because you can't weld it. But you can get 525 and 631, or just any double-butted 4130 or 25CrMo4 cromoly (which is what 525 is anyway). A bigger...
Forum: Framebuilders
04-30-20, 02:55 AM
Replies: 410
Views: 248,356
Posted By guy153

Looks amazing, well done!

Looks amazing, well done!
Forum: Framebuilders
04-29-20, 02:23 AM
Replies: 4
Views: 358
Posted By guy153

I think it's probably fine. I can't remember...

I think it's probably fine. I can't remember exactly how oval the frames I've seen this on have been but 0.5mm doesn't sound like too much. If the cups go in all right and then the bearings turn...
Forum: Framebuilders
04-28-20, 02:09 PM
Replies: 4
Views: 358
Posted By guy153

The decision to ream or not is based on the...

The decision to ream or not is based on the average of those two measurements because once you start pressing the cup in it will make it a bit rounder.

The average of your two measurements is...
04-27-20, 10:54 AM
Replies: 162
Views: 10,703
Posted By guy153

From Reynolds but via my bad memory. It's...

From Reynolds but via my bad memory. It's actually about 2.5x stronger. UTS for 953 is quoted as 1850MPa, and 531 is about 700 or 800MPa.

My point still stands though: you could use 531 in...
04-27-20, 01:29 AM
Replies: 162
Views: 10,703
Posted By guy153

Yes you're right about the thin walls being a...

Yes you're right about the thin walls being a limiting factor. The super high end steels nowadays are 4x the strength of Reynolds 531, so in theory you could go to about 0.1 wall thickness and 50mm...
Showing results 1 to 50 of 164
 


 
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