I took out parts of bobbin to clean and when put them back the needle hits the metal of the bobbin case and i cant sew. it doesnt seem to be properly aligned.

If the needle hits the bobbin case, it may break the tip of the needle. This usually happens if the bobbin case is not placed correctly. After cleaning your sewing machine, you may fail to put back the bobbin case into its original alignment.
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Singer Sewing Machine Needle... Repair Questions - Fixya

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Recent Singer Sewing Machine Needle Bar questions, problems & answers. ... 0 Answers I am having a problem with a Singer Sewing Machine, Model 6268. When I try wind the bobbin it seems as though the needle is scraping the metal area ...

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My sewing machine keeps jamming, down in the bobbin area. ... If it seems really tight, on the side of your bobbin, there should be a little tiny screw for which you .... Itried everything else first: changed needles, to a brand new spool of thread and bobbinthread, ... My Kenmore sewing machine model 158.16800 freezes.

did you find the tip of the needle? Also you may have a nick in the metal where the needle hit and broke.It can catch on other parts and need to be sanded or replaced.One time I had this issue and I found the tiny broken tip under my bobbin case.

This sounds like your metal plate needs adjustment. Loosen the screws and adjust it until the needle goes all the way down. If that doesnt work, ensure that your bobbin case has been aligned properly.

When you open the front where the bobbin goes in, is the bobbin case spinning around loosley or is it fixed in position. It sounds as if it has not been put back in properly. Take it out and hold the spring clip which stops the bobbin falling out of the bobbincase. Hold it tight and put it oooover the spindle lining up the bit for the notch. Only let go when it is firmly in position. Also check your needle. Put in a new needle and make sure its in the correct way-it may be the needle which is the problem. If you took the "race" apart where the bobbin goes it may not be put back correctly and this could cause it-however-this is only the case if the flywheel won't turn.

I had this problem when I first bought my machine. I took it in and they told me it was a recall problem. All the machines were having the same problem. They fixed it and I have not had the problem since. I bought mine at a Joanne fabrics. Hope this helps.

It happend to me aswell , not getting the source of the problem!
Then I noticed that the bobbin casing was out of the original position, take the whole casing out and make sure that when you put it back that the small metal tension loop at the front side on the right is correct, this image you can see in your handbook, (placement of the bobbin casing)

It sounds like your timing is off because what you're describing is exactly what happened to me last summer. I took it to a sewing machine repair shop and they repaired the problems, gave it a nice cleaning and it was like new when it came home. But it took two weeks (not a lot of repair shops around here) and that was torture as it's my only machine!!! :)

I'm having a similar problem today. I took out the bobbin case and when I went to put it back in, the whole system locks up. I've tired cleaning, changing needle taking the metal plate and piece that holds bobbin case out and put it all back in after cleaning. Nothing. My symptom is I can't get a complete stitch, the needle goes down, the whole deal acts like it will work and as soon as the arm of the bobbin case gets to 8 o' clock on the gears, It jams and won't hardly move. I cannot pull the bobbin case out easily after this. Perhaps there is someone out there that can help us!

Can you remove the bobbin? Sometimes when thread gets bunched up under the lower plate it will force the bobbin out of position. Try taking it out and cleaning any loose thread and lint from the area. Put a couple of drops of oil on the outside of the bobbin case and re-insert it. Make sure you lower the needle and pull the bobbin thread through to the top and back behind the needle before beginning to sew again.
Hope this works!
Zelma