Make: Projects CEB Shaker Hammer and Shaft By Brianna Kufa Category: Gardening Difficulty: Moderate Sketchup Model Additional Materials Required: 1" Keyed Coupler 1/4"x 2" Bolt Share this: Pin ItMoreEmailShare on TumblrDiggLike this:Like Loading... Parts / Tools Welder (1) Angle grinder (1) Drill press (1) Chalk or something to mark steel with (1) Steps Project Steps All1. Prepare the hammer2. Couple the shaft3. Drill hole for bolt in coupler4. Weld the shaft to the hammer Step #1: Prepare the hammerNextDrill or punch the hole in the flatbar.Weld the two pieces of flatbar togetherThis needs to be a really strong weld! The hammer will be under a lot of stress, and if it's not a solid weld, it could fly off! (This is why the guard is there).Tack the shaft into the hole so there's about a 1/4" distance between the end of the shaft and the opposite side of the hammer.Step #2: Couple the shaftNextCut the coupler down so it's 2" long. It doesn't matter from which side you cut it.Get the shaker motor, the mount you made, the shaft/hammer, and the coupler.Put the shaker motor onto the mount and couple the shaft to it. Mark where the shaft enters the coupler.Make sure the coupler won't be rubbing on mount while it spins.Make sure the hammer has about 5/8" clearance from the mount.If not, you can pull it out of the coupler a little, but make sure the bolt won't be too close to the edge.Otherwise, you can grind away the tacks on the hammer and tack it properly.Step #3: Drill hole for bolt in couplerNextRemove the motor and shaft from the mountPut the coupler back onto the shaft.Drill the 1/4" hole thru the coupler and rod, using the mark you made to make sure the rod is inside the coupler the proper amount.The hole should be 3/8" away from the edge of the coupler.Drill thru both at the same time. You will need some sort of vice to hold it down while you drill.Double check that your bolt will fit thru. If not, either re-drill it with a slightly bigger bit, or do another set of holes.Step #4: Weld the shaft to the hammerRemove the couplerFully weld the hammer to the shaft, plug-welding the back side, and welding around the shaft on the other side.Make sure this weld is SOLID.