Marc1

I think that since political post are not allowed, it is unfair to post green anti-CO2 propaganda that is fundamentally political and not even remotely technological. 

9 hours ago, ausfire said:

We need 44 gallons when we have twenty bulldozers and over forty vintage tractors to cover Marc! That's before we start on about sixty trucks and cars. A 44 drum doesn't last that long. And then there's the farm machinery.

I am sure you do ausfire. I was answering someone else's comment on it's price 

That is a lot of machinery to cover!

An excellent idea. 

At 10 times the cost of rooftop solar panels, a technology that is only feasible with massive state subsidies, solar roads will need trillions of dollars of subsidies to be even remotely feasible. An army of subsidised factories, with an army of overpaid lobbyist, managers, do gooders and assorted cheer leaders leading the charge against our wallet. 

I love it!

Wow, that is a relief ... Looking at the pictures, I was afraid you were going to use the wooden prototype ... ha ha. The final product is nice looking and sturdy. 

Does the belt stay in place? 

Cleaning the screw may help but my guess is that your hinge is too tight and dry. 

Pull the pin, move the moving jaw out of the hinge, examine the condition of the parts, and check for high spots or uneven wear that catch. Clean, smooth touching surfaces, grease and put all back. 

I think the obvious comment is  ... why not just water? 

Would you like to have a central hole and a ring through it? You can then hang the bell from the ring 

I can't see a thing, but a guess is steel to reinforce concrete. 

The hole in the center sounds like a good idea. I imagine that anything on either side of the center will dampen the sound a bit (?)

That anvil looks like it has done a lot of heavy work. That is not just a chip, the steel face is coming off the base and using it like that may actually make the damage worst. 

Sure it is not an easy fix, but in this case I think it is warranted to weld the plate back and make a proper repair. 

13 hours ago, CTBlades said:

4K a drum, uh yeah I think I'll pass lol!

$150 a gallon. No need to by 44 gallons.

If you watch the video posted above, Haberman goes to Italy to visit a blacksmith who uses a water powered hammer. In case you don't understand german, he is telling that an american plane shot down by germans fell near his shop and he has been recycling metal from the plane since that time.  

The title of the video means "The last of his kind" The blacksmith from Bohemia

Knifes and roses .... next try an old revolver and forge the barrel

Good job

I find his passion for tools and blacksmithing contagious, the way he talks about it at age 75 ... I can only hope I can have that spirit at that age. 

Alfred Haberman, artist blacksmith and designer passed away 2 years after recording that video.

Sure ... I was thinking more in the original question, anvil vs stock size. 

Let's say you have just one size anvil. Say a 90 lb one. 

You can work any size stock you want up to a point. Say probably 1" square. Why? not because of the stock but because of the size hammer you need to move it effectively. 

If you take a 4" square bar on a 90 lb anvil, and work it with a 3 lb hammer, you will probably be there a long time but there will be no damage to the anvil, in fact the anvil will be safer if you have 4" stock on it than if you have 1/2" stock on it since the mass of the stock ads to the mass of the anvil combined to form the static mass so to speak, as opposed to the moving mass of the hammer that does all the work or the damage for argument sake.

Take an 8lb hammer to it, if you can swing that, and you will probably endanger your little anvil. 

I remember having to "fold" the ends of a universal beam to make the end look neater ( I think you call them I beam) I did so with a 5 kg hammer but had no need for an anvil. The beam itself had enough mass to absorb the hammer blows. 

Good fix for an exasperating problem exacerbated by your exasperation ...

Or words to that effect ...

Punishment? Oh, if you choose an overcrowded beach I suppose ... I was referring more to historically accurate date.

White Christmas ... you guys shouldn't have white Christmas anyway even in places that actually snows ... since Christmas should be in your summer not in your winter ...

20 minutes ago, gote said:

To get into the original question, I think that it depends not only on the size of the stock but also on how hot it is and of what material it is. I think we all adjust the weight of the hammer to these parameters. Then the anvil should have so much inertia under the hammer that its upper surface does not move downwards appreciably and that brings us back to the original question.

I was waiting for this. Stock size vs anvil size is missing the hammer size. 

Since one changes the hammer according to the stock and according to what one wants to make, and most of the time the anvil remains the same, in the end it is hammer size vs anvil.

After all if you have a 25k anvil and you place a 200mm universal beam on it, as long as you hit it with a one kilo hammer you have no problems. Try to forge the beam with a 10 kilo hammer and you will see some damage somewhere. So it is the hammer and not the stock that needs to be in proportion. Sure the stock is usually proportional to the hammer but not always. 

Which brings me to a side question ... is there such thing as an anvil that is too big? 

2:100 is the ratio that comes up from time to time when people talk about it, but the subject is so rubbery and there are so many considerations that 2:100 is just a number really.

And when folks get technical about this, the sky is the limit. I once heard a guy saying that he had fixed his anvil so well to the ground that the earth was now part of his anvil ... and one can elaborate further if wanted.

I think that 2:100 is a good rule of thumb and that when it comes to anvils, size does matter.

Lovely Echidna. Very well proportioned. 

That is some scary grasshopper. Imagine a plague of wrench-locust like that one. Oh my! ...

I remember going to the local trash and treasure market one Sunday afternoon, but most stalls had packed up nad left for the day. I was wondering the grounds checking the few still there when I noticed something left behind. It was a little salesman anvil shaped in London pattern, perfectly proportionate but fits in the palm of your hand about 4" long by 2.5" high. That one followed me home alright!

Ha ha ... tap tap and look at it ... seen that on you tube