![]() ![]() The actual design of an inertia block foundation would take into account the type of soil the intertia block would be bearing upon. If the hammer were operated on the floor slab that the rest of the shop is on, the vibration would be transmitted into the structure as well as any other shop equipment. Ed also is correct in stating the foundation for the hammer should be isolated from the floor slab. It has enough mass to absorb the energy of the hammer. The type of foundation needed is referred to as an "inertia block". You can probably get specific examples of 25# foundations from other users on blacksmith forums such as (currently offline for server maintenance as I type this, but almost always up and available).Įd Thomas is correct in his assessment of the type of foundation needed. The most important thing seems to be to provide enough mass for the hammer, and to isolate that mass from the rest of the floor. I have not built a foundation for a 25# or any other LG, but I have built three for my own Beaudry hammers and not had any problems. You can adjust the working height by making the bottom layer extend out enough that you are standing on it to operate the treadle. If it doesn't get the working height too high for you, you could even go another layer. Put one layer of yellow pine down and the next at right angles. A 4" slab is a bit thin, so maybe put a rubber pad under two layers of yellow pine 2" x 10" or whatever width is convenient. ![]() You can probably build a decent wooden platform over your existing slab and be just fine. Tom, a 22" thick slab is pretty substantial for such a modest hammer. ![]()
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