Here is a list of all the postings fizzy has made in our forums. Click on a thread name to jump to the thread.
|Thread: Metric Flat brass bar|
one solution i have used when milling thin brass is to soft solder it to a bigger piece which wont deform in the vice. Solder paste is good for this job but not essential. When its milled simply hot the piece up and off it pops. Soft solder can be wiped off ur lightly sanded.
|Thread: Can we have a really clear distinction between Silver Soldering and Brazing|
Indeed Steviegtr, eventually this technonogy will filter down to home use. Not sure how strong the glue will be in 100 years though
|Thread: Robot Wars|
Its been on and off since 1998, different series and different channels so its on hold...it will be back.
|Thread: Silver Soldering Brass|
Totally agree with Dave W, unless you are gas cutting big chunks of metal or gas welding you dont want to be wasting a lot of money on acetylene, and you certainly dont want it near houses. If its in a fire and doesnt explode your neighbours will be forcefully evacuated for 48 hours (in UK), your home insurance is void and you wont be popular with the local fire brigade, police, neighbours and so on. Remember the M25 being closed in both directions for two days a few years ago? That was an acet bottle in a fire in a scrapyard near the motorway! Oxy prop is relatively safe and cost effective. You can buy new rerulators very cheaply - dont be tempted to buy second hand, too many out there never serviced and faulty. I bought mt torch and arresters second hand. Go for the small brass BOC type if you can, they are a lot lighter than most, and being vintage are well made of brass. This torch uses the smaller fittings (size eludes me - 1/4 bsp as opposed to 3/8 bsp? ). Make sure you get 6mm bore hose, it will supply all the gas you need and is a LOT lighter than the 3/8 bore. Trust me, silver soldering with the bigger hose is not fun. The nozzles which came with these torches were originally for welding and most of them are too small for my silver soldering needs...so I drilled them out a lot bigger. Using oxy/prop is a complete game changer. No faffing about with thermal blocks to keep the heat in - you obviously still need a hearth of some description. For my range of stationary and marine boilers mine consists of a single foot square of bbq lining board. No amount of heat will upset it and I simply move it to one side when im not using it. Always use T5 flux as its not worth risking the flux burning out before the job is complete. No silver soldering today, instead ive been annealing copper plate and pressing end plates. A big nozzle on the oxy/prop makes reasonably short work of it, even when youve got 60 to do. Hope this helps in some way.
Pendle Steam Boilers
|Thread: Take 1 1/2 hors of your life to watch this|
Thanks for the link JB...never heard of them, but they make some nice, if expensive complete engines. Going to take a few cancelled shopping trips to get this...**LINK**
If you think £20 will take the wife shopping for 90 minutes im not suprised you havnt got a wife (only joking)....give her £150 and you might be in with a chance.
|Thread: Electric welder at Lidl|
I once had one of this type, they will tack stuff together but they will not produce a structurally sound weld. Thats not to say that in the right hands (I was a full time coded welder back then - I could weld) a strong weld is impossible, but where a complete novice would struggle with a proper mig set up they would surely fail with one of these. On the cheaper models the wire permenantly live which only adds to make things more difficult. The weld will invariably look like bird poo! I could get a half decent weld on thin steel by using max amps but other than that it would just spit bits of metal at the job which might or might not fuse together. I gave mine to my brother inlaw who most certainly confirmed the above!
|Thread: Silver Soldering Brass|
Ive never met anyone using a generator for brazing, not saying there aent any, but I have seen them used on youtube. With an average flow rate of about 2 litres per minute (five max) at ambient pressureyou would not be able to burn with a decent flame for anything but the smallest of jobs. Fine for very small work but dont even think about using it on a boiler anything bigger than a mamod. Given that you can easily get the same and a lot more heat out of a b&q £20 prop torch the cost would be very prohibitive...But, for super fine/fiddly jobs you would have a lot more heat control and accuracy so it does have a place in some workshops.
|Thread: New to forum|
Ive got one burried in a shed somewhere....never liked the round bed though. Welcome Neil,
|Thread: Harrison L6|
I took one off a few years ago, cant recall the detail but I remember it was far from as straight forward as I had expected, sorry not much help but be prepared if nothing else!
|Thread: Steam operated drain cocks|
I tried some a few yrs back....wasnt impressed
|Thread: Silver soldering a previously soft soldered boiler|
Whilst its not something I would do on a complete boiler.....if the silver solder has clearly taken to both surfaces (and it is obvious when it hasnt) then the joint should be sound. I have removed soft solder from joints and re-soldered with silver solder, albeit on brass with no ill effect. If youve cleaned away the soft solder and used quality flux, rod and given it enough heat then all should be well. If it passes test at twice wp then you know its taken properly. As stated above, any soft solder would have turned a nasty, almost black colour after pickling and would stand out. Hope this helps.
|Thread: Does solder seep into copper plate ?|
Whilst copper oxide will react with sulfuric acid as a redox reaction the copper metal itself, for all intent and purpose does not react and will be unaffected. This can be demonstrated by leaving a clean piece of copper in a bath of conc sulfuric acid for six months (or by losing a boiler end plate!) and then upon finding it checking its condition and thickness...unchanged so far as is possible for me to detect. Not suprising since copper is one of the least reactive metals we have. So whilst the pickle will remove the oxide layer it wont remove the solder which may be engrained in its surface. Funnily enough we bought our daughter a microscope for christmas and last weekend put a piece of new 'flat', smooth copper plate on for her to see what the surface looks like. Even at relatively low magnification it is very rough.
|Thread: Silver Soldering Brass|
For boilers I have to use oxy/prop as I need the heat, but for all of my smaller items, gas tanks, burners etc I use a Rothenberger Sure Fire and can verify that they are well made and put out good heat, trigger fired so very versitile too. Nigel,
Pendle Steam Boilers.
|Thread: Homemade Lathe|
A couple of steppers and its CNC ready. Those big cnc ball screws arent cheap though.
|Thread: Machining copper|
As a full time copper boiler maker I do quite a bit of this.....I only ever use CCGT tips (as per JB) for turning copper as they out perform everything else by a country mile - no grabbing and clean cuts. Standard drills are fine but beware that your holes will all come out slightly under size. You need to lubricate when drilling copper, and it gives a better cut when turning, I use wd40 as it does the whole machind good and doesnt smell bad. Good luck!
|Thread: Minnie traction engine stays help need|
As a professional boiler maker I can tell you that I have previously attempted to salvage boilers akin to this and in ever case failed. Bear in mind that I am making them all week, every week and silver soldering on a daily basis. You might get lucky if you drill them out and re-stay but more likely is that you will end up with leaks all over the place as you attempt to re-solder them. This might sound like a defeatest attitude but having been there on several occassions I know what to expect. Good luck though and keep us posted.
|Thread: Ebay being clogged up by certain sellers|
dont take any notice of the location filter - the chinese all say they are UK based. Take a look at delivery time, anything over a week is suspect. I get annoyed by the advertised amount bearing no relationship to the actual amount...its a minefield!
|Thread: 5" gauge boiler rod stays|
Ive got all Issue 8 2012 - pm me if you want it
|Thread: On The Wire -ARC Cutter Review|
What spindle speed Jason? Is it likely to give the same results on a non cnc machine? Thanks.
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