fish fabrications. co. uk
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Cheers. Yeah, just for a change really and I spent a fortune on a gas fluxer so felt I should use it more! Like alot of people I guess, seeing Curtis frames as a teenager has stuck in my mind.
I still like TIG, I just need to practice on such thin tubes. I can knock out some inoffensive TIG welds on thin tube, but getting that last 10-20% of quality is really hard and I need to come back to that at some point :)
Got lots to learn with brazing too. So much to practice!
This is a chrome finish I did about 11 years ago. Wet spraing a chrome finish seemed quite a new thing at the time, in the UK anyway. It was a bit wierd process!
You do all the normal primers then a 2K gloss black - left to fully cure. Then a silver nitrate solution thinly sprayed, which is gently wiped to lay all the particles down (yeah, sounds strange), then a water based sealant (looked like PVA to me!), then normal 2K clear over the top.
There are lots of other ways to get a semi-reflective finish now, including that one where they seem to contantly spray the part with distilled water which looks highly reflective after.
Pictures from the customer once he built up the bike.
Keep a search notification on for 'jig borer' - Like a mill really but geared more towards plunging instead of x/y - I think that's right anyway. They usually have a small table which is enough for positioning a tube mitre. They also tend to be rigid things for repetitive acurate work.
Some are massive, but most are small.
Also, most people are not searching for jig borers so you may get one under the radar with less bidding competition (apart from me) :)
Ah yeah, hi Tim!
Blast from the past.
I finally sold the frame last year, shame, as I think it would have fitted you from memory.
All well thanks. Hope you are too!
YEAH! Sam. Who's this? :)
Must have been 2005/6
Bankers from RBS coming in and wanting to buy a fixed gear bike on a lunch break. What happened to Shop 14 Bike Co in the end? The customers went there if we sold out of charge plugs. ha. So long ago now.
This is my Rondinella TT frame I used to own - before and after I put modern components on it.
It was completely original (although I changed the tubular SATURNE rims for commuting), including bar tape and everything - Campag pista chainset with Super record rear derailleur. It was sacrilege to change it looking back. I put carbon Centaur on there but should have kept it as it was.
I commuted every day for 2 years on this.
This is the finished frame sat back in the jig.
You can spot a couple of low point in the brazing. I need to lay more brass on there. I couldn't be bothered to go back and build this up and I'll loose quite a bit in the primer. I'v got to remember this isn't the one-and-only... I need to make as many frames as possible to get better, so this could only be ridden for 3 months and then join the other one on the wall. No point going crazy with finishing - I only spent 2.5h sanding all the fillets. I didn't do much on the concave fillets ontop of the BB, that takes alot of work.
The fillet sanding is something I have done alot before on other projects and is something I enjoy. I think my knuckles may think differently though.
That's where I got to. Just waiting to get back to paint and for the bike shop to do the BB tapping/facing when they open. Tempted to buy the tooling but I'm not sure if the Icetoolz or similar BB kits are any good? Can't spend £500 on a Park Tool one - I know it's a good bit of kit, but it seems to have too much bike-tax added for me.
To the brazing.
I'm coming from a TIG background and carry over some bad habits that were acknowledged on the excellent BA course. I tend to dab the filler rod in but find this leads to quite a low bead with a small 'throat' when brazing - as you'll probably see around the BB below. I'm still working out how to build this higher - I'm still running a bit hot at the moment (I think) as I'm keen to see it fully wet into the root, but I could be going a little too far with the heat. Hopefully as confidence comes I'll be able to drop in more brass while still being confident it's flowed properly.
Also the brazing samples I did on the Bicycle Academy course are much better than the ones I did on this frame. Having somebody standing over and giving pointers really helps. I now just need to put the time in.
There is so much involved with making an accurate frame. I'm working with metal every day and strive for the best quality, but making a frame is a real test - The level of accuracy required and the amount of things going on keeps the brain working. I'm sure this becomes easier after 10 frames and potentially repetitive when doing a frame per week, hopefully I get to find out.
Hat's off to frame builders out there.