How to Load a Bobbin on a Sewing Machine. Remove the bobbin from the sewing machine. Note whether you have a drop-in, front or side-loading bobbin on your sewing machine. A drop in bobbin will load from the top, typically via a removable bobbin case cover near the machine-fed dogs.A side or front loading bobbin needs to be loaded into a removable bobbin case under the machine.our sewing machine should have a standard thread spool to hold the thread and a short, squat post wide enough for a bobbin. Look for these two elements, as well as a post or guide for the bobbin thread. In newer machines, the bobbin winder apparatus is most often on the top of the sewing machine.