Machine is threaded but thread not sewing into material, just holes!

Depending on the brand of machine, you insert your bobbin into the bobbin holder, thread the top part of your machine, including the needle, then turn the wheel on the side of the machine by hand and it will catch the thread that is in the bobbin and it will pull it up through the bobbin hole. Once it is pulled up through the hole, near your needle, you will pull the thread towards the back of the machine and leave it. Then start sewing.

after threading the needle pull about 6" of thread out the back under the press foot
that way the thread is jammed under the foot and is held in place for the next thread
bobbin thread should also be out the back
when you have finished sewing then lift the foot and move the material sewed about 6"" away from the foot before cutting the threads

There is not much of a secret to inserting a bobbin in a sewing machine. A couple of things to check, the thread from the bobbin should be pulled through the slot of the carrier, and make sure the thread comes through the sewing hole by manually lowering the threaded needle and then lifting it out of the hole again after it has picked up the thread from the bobbin. The video link posted below is useful if you have a Brother sewing machine.
If the stitching is still not right then check that the needle is fully inserted in its housing. (Push the needle up as far as it will go then tighten the screw.)
How to wind and install the bobbin and thread the sewing machine PART 2...

Needs a new needle right way around, most likely. And check the threading on both bobbin and top of the machine. It makes a big difference which way the bobbin turns in the bobbin case.

Needs a new needle right way around, most likely. And check the threading on both bobbin and top of the machine. It makes a big difference which way the bobbin turns in the bobbin case.

Needles need to be replaced every 2-8 hours of sewing time, on average, or about 1 needle per garment. A needle that has hit the presser foot or needle plate is "dead", and needs to be replaced to (and eventually, you'll need to buff out the rough spots on the presser foot, and needle plate).

Common causes of skipped stitches (stitching that looks like
_ _______ _ _ _______ _ _____________ instead of _ _ _ _ _ _) or of not picking up the bobbin thread are: dull or damaged needle, needle in backwards, needle not fully up in the needle clamp, needle too small a size for the thickness of fabric, dirty machine, misthreaded machine, and way, way, way down on the list, machine out of time.

Hello

Set the tension on the sewing machine for the weight of the material you want to sew. The tension setting shows in the stitch on the material. Use the chart on the machine that matches types of stitches with suggested material tensions. An example of this is, the stitch to sew jean material is different than the stitch to sew silk.

Take the bobbin and wind the thread around it. Make sure the bobbin is empty and don't fill it too full of thread. A bobbin filled too full won't stay tightly spun.

Thread the string evenly on the bobbin. Move the thread back and forth evenly and in layers that are level. Many Singer sewing machines have a bobbin winder on the top of the sewing machine, and the consistency of how it threads can save you frustration later.

Find the hole on the bobbin that is located near the inside spindle of the bobbin. Take the thread sitting on the sewing machines spool and insert the thread in the hole from inside the bobbin to the outside. Set the threaded bobbin on the spool designated for spinning on the top of the sewing machine for some Singers.

Turn the side drive wheel slowly until the threaded bobbin has a layer or two of thread on it. Push down on the drive peddle and fill the bobbin, but don't thread it to the very edge. If the bobbin is too full the thread will release erratically. Cut the thread from the spool.

Drop the bobbin into the bobbin case under the area where the needle sews the material. Close the case and turn by hand the side wheel drive until the bobbin threads into the sewing machine. You can tell when the bobbin is threaded by the tiny piece of thread that juts out of the bobbin case where the needle goes up and down.

Grab the thread with your fingers and pull it out approximately 4 inches. Your bobbin is now spun and threaded.

Is this the first time you have used the machine? If so you need to bring up the bobbin thread by hand before stitching. Only when both bobbin and top threads are up through the needle plate nad pulled towards the back of machine, will the machine form a stitch.

You only need the thread to loop over the bobbin thread to bring up the thread when you are threading the machine. If, you mean it is not sewing after threading then I need more information.

There should be a spinning cover with a hook that fits over the bobbin. Normally, you just pull the bobbin thread out through the swinging/sliding plate hole. Turn the machine by hand toward you (at the top) until the needle dives into and comes back with both threads. Separate the threads and assuming that the thread tension above the needle is set correctly, feed a piece of material in to see if it sews correctly. The tension is set so that the thread is even on both sides of the material. Let the machine pull the material through at it's own pace, your function is to guide the material.

you may have adjusted the upper tension and made it so tight that the thread just pulls out of the needle and needle makes holes in fabric. you might want to check the feed of the bobbin, it will not allow the machine to sew if it is not able to be picked up by the needle. the bobbin thread is usually (when held in your hand) with the thread coming counter clock wise. and then it will lay in the bobbin holder and the end of the thread will come back to about the slide catch thing and be held there until the needle thread catches it (leave the cover off the bobbin area until you watch and see what happens then. Try adjusting the bobbing tension too hope you understand what I mean here.