![]() ![]() I've never seen it in a Swedish cast steel anvil that hasn't been through a fire or such. I've seen this most commonly in wrought body anvils but some cast bodies too. Sway is (IMHO) caused primarily by deformation of the anvil below the face steel. The cause of edge damage is pretty obvious, though I'm sure some clever folk have come up with other methods. I only see two types of anvil damage on healthy anvil. The only legitimate hammer:anvil ratio I've seen raw data for is the power hammer ratio. Striker, horn, and hardie work are of course exceptions to this. One experianced guy working with a hand hammer is unlikely to damage any reasonably sized anvil, so if anone thinks they are suffering due to small anvil syndrome pratice more and slowly work up to a bigger hammer. However, when hand forging your strength, endurance, technique, and hammer size are as important as anvil size. If you work on the horn or in a swedge in the hardie hole, (or do much of anything more than forging a simple taper or beveling a blade) there is significantly less mass under the hammer and the overall mass of the anvil would need to go up if you wanted to maintain mass under the hammer. On a hand forging anvil this is not true. On a power hammer all of the anvil mass is directly below the hammer head. There is also a link somewhere here to a Japanese engineering paper placing the ideal ratio somewhat lower. The gist of the chart is that minimum shoud be about 10:1, there are diminishing returns beyond 20:1, and 15:1 seemed to be a sweet spot on the cost/benifit curve. showing POWER HAMMER tup to anvil ratios. There are a few threads on this in the power hammers section, and in those threads are refrenced a chart from Chambersburg Engineering Co. I realize a definitive paper is most likely not available but with enough people looking and discussing the subject we should be able to sort it all out. What is the original source? Who made or chose the numbers? I am looking for where all this started, the research that determined the *correct* size ratio. I have also seen comments that 3 and 4 pound hammers can be used but not for constant use as it will start to deform the anvil.ĭid someone long, or not so long, ago threw a guess into the air?ĭid it take hold like a urban legend and every one else repeat the number because it sounded like it had validity? Or is there research to prove the number? This is suppose to be the *correct* ratio as to not damage the anvil with use. That is a 2 pound hammer on a 100 pound anvil. I have seen where a hand hammer should be 2 percent of the anvil weight. ![]() ![]() Soderfors Sweden is literally a small industrial city.There has been a lot of numbers thrown around for anvil size and hammer size. they'd paint and label them as you wished to pay for. When they came out of the chill bath they went to be finish ground and stamped, often with the buyer's brand name, etc. There was no guesswork involved, they did so much precision casting and heat treatment they had anvils to the gallon of water and second. Anyway, the residual heat in the body of the anvil tempered the fact to a nominal RC between 60-62 and they were them chilled in a circulating water bath. This was a quality control check, not actually necessary unless something went wrong. The line carried it to a station where the face and sides were ground to observe temper colors. The line's travel rate was timed to allow the anvil to reach the desired temperature before being water quenched under the flume by a precise amount of water in a precise length of time. Then the molds were broken open dropping the anvils on another moving line, and taken to a flume to be quenched. The anvils were poured on the line and left in the mold a specific time depending on the size and model. The "faceplate" line on Frazer's, yours and mine are purely cosmetic. ![]() Yes, they're: high carbon, vanadium, monosteel, casting, they don't need a faceplate. ![]()
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