josef

Hi Jason, I've recently been thinking of building an inline treadle hammer. I had plans from the grasshopper treadle from several years ago. Then I started searching on straight line 4 bar linkages and found the Hoeken's linkage which looks similar to what you have drawn. I'm wondering if you have any comments of types of bearings and size of shafts for treadle hammers? Is 1/2" large enough for the shafts using bronze sleeve bearings? Is steel on steel with plenty of grease good enough? thanks, Josef