Meanwhile the square anvil had to be moved using machinery (a fork lift) as soon as it was all welded together. Remember however, that you pay a premium for the hole in a pipe thus the steel is relatively high priced compared to solid of the same weight.īefore we added the extra pieces to the round core above we were man-handeling the part. They would build six hammers with the steel we used for one. Some builders use pipe with a heavy steel cap. So, What's the difference? Anvil weight? More or less? I'd still like it to be more but the anvil steel is where a lot of your money goes.Ī 12 x 12 anvil would only come in at about 1300 pounds and be getting closer to that optimum 15:1 anvil to hammer ratio. The square anvil came in at 1050 pounds and was made from all new material. This is a little short for a 110 pound hammer but it is what you get when doing a junk yard build. Right - Aligning the anvil to the ram to mark flange holes.Īdding these 10 pieces of square bar makes a rather stylish looking anvil and added 260 pounds to the 400 pound core for a total of 660 pounds. In back gear they will drill up to 1.5" and bore even larger.ĭave chipping slag off welds. In direct drive they will drill up to 3/4" feeding almost as fast a much smaller bit. While these machines look antique they are highly efficient hole making machines. We were lucky to have a 1.5" for drilling many of the parts for this project. These old back geared machines have a #4 Morse Taper spindle capable of accepting up to a 2" drill bit. The drill press used to drill both anvils and most of our other parts is an old 25" Champion. So the die holder holes had to be drilled and tapped directly in the end of the anvil.Īt this point we have not added the extra mass so the core is still handleable using a hand truck or walking it across the floor. This anvil does not have a cap or sow block. We had several anvils cut and several 1-1/4" thick flanges. This was just large enough that we had to have someone else saw it to length. The second anvil started as a large 7-5/8" diameter piece of steel shafting. With the top dies that is a total of 10" for special tooling without raising the ram from its lowest position. Removal of the anvil cap and die creates an extra 6" of tooling space. This was a late design decision supported by the luck that the holes fell on the centers of two of the 1" plates. The large 3/4-10 holes were drilled and tapped in assembly as shown. The anvil cap was drilled and tapped for the die holder mounting holes and the extra tooling holes before tacking to the anvil. This was done in a trail assembly with the upper and lower dies in alignment. You can see the alignment tack weld in this photo. The original plan was to weld the 9" diameter round to the top of the 10" square anvil.
If necessary the ends can be hand ground to remove high spots. Welding a base plate or flanges on the bottom takes care of most of the error on that end. The critical thing when aligning these pieces to be welded is to create as flat and square as possible surface on one end (the top) so that the anvil cap will come in contact with as much surface as possible. In fact it can be done with bar of varying size if carefully arranged. This makes it possible to scrap bar to build a very solid anvil. The same method could be applied to build up a 12" square using 1 x 6 bar (or 1/2 x 6 or 2 x 6). In this case we are using 1 x 5 bar to make a 10" square block. The stack being made above uses commonly available flat bar to build a heavy mass that is nearly equivalent to a difficult to source solid. Now strike the bar in the middle from the side. This demonstrates the efficiency of a long mass in line with a force. The steel will bounce off a larger hammer or the hammer will bounce of heavier steel. Take any steel bar 1/2" or larger and 3 feet or longer and strike the end of it on line with the long axis. The long bar approach is based on the fact that mass in line with a blow (force) is much more resistant to the blow than distributed mass (load applied from the side of the same mass).Ī simple experiment demonstrates this. We needed to add weight to the ram and ended up attaching pieces of 1" square to the outside of the round ram. This idea stemmed from my original JYH (Junk Yard Hammer) built in 1998. These anvils are the realization of two built up anvil drawings I made in 2005 and published in 2007.
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