How do I thread a Singer 5050 C sewing machine? How do I load the bobbin ?

SOURCE: thread balls up in the bobbin/singer sewing machine, also thread

The balance stitch control on this model is below the stitch patterns; to the far right.

If you need a manual you can download a free one at the Singer Company website.

SOURCE: Singer Pixie - trouble threading bobbin

look at the bobbin direction. if it dont pick up that way, change the direction

SOURCE: Singer Sewing Machine model 9224. Bobbin thread

If you turn the handwheel, can you see a metal ring rotating around the outer edge of the bobbin case? If not rotating, broken gear or timing belt off.
If that ring is turning, remove the needle plate and bobbin case. As this ring now rotates, you will a finger on the ring that will pass behind the needle from right to left and it should catch the thread from the eye of the needle. If this finger, the "hook" passes above the eye, you have a timing problem.

Let me know.

SOURCE: how to thread the bobbin on a singer touch and sew model # 625

how to wind the bobbin of the singer touch and sew model 625

SOURCE: threading up a bobbin in a singer 560 sewing machine

I'm guessing it's probably the same as mine (8280). This is what the manual says: "Hold the bobbin case with one hand, insert the bobbin so that the thread runs in a clockwise direction. Pull the thread through the **** and under the finger. Hold the bobbin case by the hinged latch and insert into the shuttle." It's hard to describe, but if you've sewn before, it should come back quickly. To be more specific, hold the bobbin case in your left hand, insert the bobbin so the thread is coming up from underneath, pull thread through the **** and into the part where the hole is. If you slide the thread around, it will fit into the slot in there. Pull the latch out and insert it into the shuttle.

Hope this helps.