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The ad says Toshiba mosfets, the things that handle all the power and make it manageable. Not the welder itself, but that wouldn't surprise me either.

If Toshiba made parts was the only sticking...

I used to wear Blunnies (Lace up, saves ankles) and Explorer socks.

Not the bottom of the barrel boots, they had some shock absorbing sole of some kind.

Nowadays, I couldn't say what's worth...

Sounds like the same Mig I have back in Oz.

I loved the thing, and it served me very, very well. It's still going great guns now with a mate who is looking after it for me.

Couple of things...

Yes it can.

Problem is that once hardened, it's likely to also become quite brittle, and somewhere that's going to see the odd shock or two (like a tool rest) may decide to snap just for the fun...

That's what the knurls I have seen look like. :D

Thanks for the Link Grahame. Sure beats trying to buy one of them goofy things. ;)

A second on E & J Winter.

Good to deal with, don't charge like a wounded bull, huge range of stuff you'd have trouble finding normally and pretty quick.

(The post office was the reason their...

Concave face knurling wheels.

That's what I have seen, although there are many ways to skin a cat, especially one with curved edges. ;)

The bits are triangle shaped, as in they should be clamped down so you can present a new tip to the work when one wears out?

That's didn't read so well did it?

Is the tungsten tip supposed to...

Aluminium machines like butter, or like a b*tch depending on what alloy and temper it is.

6061 is heat treatable, and the T* is the temper, very common is T6 which is quite hard and tough.

The...

And over and under knurling doohickey, as used on low power lathes (read as flimsy lathes) would work.

Not quite like a pipe cutter, but the principle is the same.

Simply, a pair of arms, one...

Yep, make it hot.

Like Grahame says, anything that burns will be enough, but you might need to force feed the fire with air.

A couple bricks, some charcoal/wood/heatbeads and a hair dryer...

Go find something kicking about that has been professionally welded, like a trolley stand (hint!). Look at those welds, and I'd be surpised if they weren't done with a mig welder running gas. Just...

I know.

I'm not in Australia, so I can spell it however the heck I want to. :D

But, I have to teach American English (:oo:) more often than not, so I do find that on occasion, the American...

I dunno if they are still there now, but it was a BOC shop, near enough to Kilsyth-Bayswater, whatever. They just threw a bottle at me. :D

I can't say that Supagas is cheaper since I am not paying...

What I am struggling to understand is 'bottle rental up front'.

I walked into a BOC outlet, asked for mig gas, they gave me Argoshield light, and said there you go. I asked about bottle rental and...

I didn't have to do any math a few years ago when I was using the disposable gas bottles myself.

After 3 I went to BOC.

Those three little bottles went by within a few short hours, and the...

Ahh...

I bet generic blocks of cast iron are not stress relived though. ;)


I heard that Rolls-Royce used to throw all their engine blocks from the foundry into a paddock for a few years...

Um, you might want to check up on that statement re: cast iron not moving. It sure as shoot moves, enough so that the most precise cast iron items go through extensive processes to stress relieve...

The whole idea behind cast iron is to cast it in the shape you want, without having to machine too much off of it.

I guess you could buy a block of it somewhere, and machine it to shape, but that...

Yep, you do need edumacating, and I think that you will be far better served picking up a book or two about hobby engineering or similar before you let that little piece of tungsten carbide anywhere...

Somebody out there in www land made one and put their effort up for perusal. Might pay to google it and see what they did. No time to go hunt it down myself.

When I get around to it and make my...

I got an order from Enco in the US a while ago, and clicked their home brand rollers 3 times to get three sets of two, fine diamond.

Something like $3 a pair or something stupid cheap. Should...

I have not made a whole one, just the optics for one. I used an existing punch-stand like device and made an optic doohickey to fit that. It works ok, but not worth the effort of replicating from...

Buy?

It's not like this is beyond someone capable of a modicum of care. A piece of clear plastic, made round in a set size, a piece of drill rod the same OD and a base made of whatever you have. ...

It may be medium carbon steel, or an alloy steel of some kind.

It prolly doesn't need to be very hard, but I'd suspect it does need to be tough.

It would depend on what you intend to use it...

I'll go through some of the books I have when I get near them and suggest which ones might be best since I have a big chunk of the machining books from Lindsay Books when the stars crossed just right...

Uhh, maybe 5-10 minutes in the oven, I'd set it at 230* since most ovens are pretty substandard for precision temp control. If it doesn't change colour right, raise the temp.

HSS can get even...

If it were me, I'd heat them hot enough to make them hard, quench in oil or water. I'd suggest oil, but even swinging them through the air will prolly work since they are thin. Clean them up so you...

In Oz, maybe a retailer somewhere, just don't know where.

Apparently Starrett have been having this warping effect only in the last few years, some change to the stuff or something. Strange...

Yeah, what Bob said. :)

There's a bunch of online retailers, Enco is about the cheapest and they are very easy to deal with. Fast too. Think LV for metal working folks. ;)


The Starrett is...

Very nice. Have to remember that one. :)

Uhh, that'll do it, err, did it...

Does it say 'Marvel' on it anywhere, as it looks identical to the ones they sell here.

I wish I had every size they sell, they are a very nice holesaw. :D
...

"Ahh, I see" said the blind man. I have one somewhere. Just not here...

Tell ya what, would have saved a heck of a lot of pucker factor drilling holes into switchboards at times using one of them...

Joe, never seen one of them punches you mentioned and I think I'd know if I did seen one. Not common in Oz since we graduated from steel conduit for most electrical work about 10,000 years ago. ;)
...

2mm should be fine. I know a lot of folks use soup cans, and I think they are nuts, well, were nuts...

One of the castings I plan to do needs a big bit of ally, plus a lot of the things I need to...

Ok, you got alumina castable cement, which is the same as what I got.

The 'other ingredients' are filler, probably not insulation. Best suggestion is find out who made it (or where you bought it)...

Quick question/suggestions.

Is the castable you are using insulating, or just good at taking the heat? If it's not insulating (read as light!), then I would suggest putting some insulating...

Harry, the EPA do love waste oil burners, since if they produce heat that is used for a legitimate purpose, then it's considered recycling which they will typically endorse whole-heartedly.

I sure...

Simso, just quietly here...

I am not qualified to do fixed wiring in Japan, which is where I am right now.

But I could be, if I wanted to. Language is one barrier, and I don't want to be party...

Electrckery is one of those things (most of the time) where if you have to ask, then you shouldn't be doing it. ;)

However, this is a plug in thing, and not hard wiring permanently connected to...

Let me put it this way...

For the cost of a single needle valve I could buy a compressor and use it to run the burner, and have it do only that.

I don't have have any needle valves, so I design...

I use kerosene, and will probably switch to waste oil in the very near future. Not because kero is expensive, but the burner I use isn't exactly user friendly. A waste oil unit isn't all that user...

So, you got that sorted at least. :)

Another option if you happen to get roped in by the melting bug is a burner, either gas or liquid fueled. Problem is that the charcoal furnace Uncle Dave...

Hmm, interesting.

The guy who is looking for something portable would probably be happy enough with just mig, but I don't think it would hurt any to have the other two as an option if possible.
...

Grahame, more info on that Kemppi doohickey please?

Got a friend here who is looking for something he can put in the truck to make truck body repairs in the field. Needs to do steel and ally in...

I gave BobL these directions a while ago, so I'll put it up here for general consumption.


McMaster-Carr <click this.

There is some funny web designing going on there, so you will need to...

Amine reacted bentonite?

Anyone out there in WWW land know a: What that is? and b: How do I make it from regular bentonite?

I have a large bag of bentonite, a hefty amount of fine sand, oil is...

You obviously have not seen my sand casting... :roll:


Ruger it is not, rugged is prolly the right word. :D

Mig, Tig, arc or oxy, which welder should we use???

The plasma is not CNC, but another guy here does have that, and if I wished I guess I could ask him to do it, but it's a bit of a hassle, and I...

That's the thing, working out where to double up the 6mm, or where adding extra bracing will be fine.

I was thinking of stitching in double thickness at the edges that will see the big stresses, ...