Can't turn handwheel counter clockwise singer model 1525

Question edited for clarity, 'make model (what it is)'.

Lots of general help below. Hopefully, you won't need parts.

The handwheel and the stop motion on a vintage Singer - part ...

oldsingersewingmachineblog.com https://oldsingersewingmachineblog.com > 2012/03/10
Mar 10, 2012 - If the stop screw will go all the way in, hold the handwheel and turn the knob clockwise as far as you can.

The handwheel on a vintage Singer and the stop motion - part ...

oldsingersewingmachineblog.com https://oldsingersewingmachineblog.com > 2012/03/05
Mar 5, 2012 - Now, if you replace the stop motion clamp screw (the chromed knob) and tighten it up, you're back to normal - rotation of the handwheel ...

Stuck Stop Motion Knob & Handwheel

The Singer Featherweight Shop https://singer-featherweight.com > blogs > schoolhouse
What is the best way to remove a stuck hand wheel. I am able to remove the stop motion knob but can seem to work the hand wheel off. I have put sewing ...

SINGER HANDWHEEL REPAIR on Andy Tube

YouTube · Andy Tube 31.8K+ followers · 6 months ago The Handwheel and Stop-Motion Mechanism of the Singer Model 353 Genie. Andy Tube · 31:45. Remove Handwheel, Motor Belt and Bobbin Winder Singer ...

The handwheel and the stop motion on a vintage Singer

Pinterest · Mommygita 11 years ago Following on from the last post, we'll now look at how to replace the handwheel, or if you like the balance wheel, which is a process that ...
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Depends on the Singer model. The owner's manual should have that information, or look for your Singer model threading instructions. For most machines, the bobbin should turn clockwise.

Does it have an inner wheel that disengages the machine to wind the bobbin? If it has been turned counter clockwise, it has disengaged the machine so all you need to do is turn it clockwise to engage the machine.

Oh, that's really a lovely vintage machine and appears in very nice condition too. If it is in good working condition, you have a keeper.

Since there aren't any manuals available, you can look at various web sites and videos of how to use similar vintage machines. Sorry, you're probably not going to find instructions that match your machine exactly. If you become very frustrated, check if there is a beginning sewing class locally where they will show you how to use your machine. Or perhaps take it to a sewing machine shop and ask them to show you how to use it. FWIW, it probably could use a good cleaning and oiling before you begin using it. (These old vintage machines do need frequent oiling with fresh, good quality sewing machine oil.)

Threading mom old kenmore sewing machine

Kenmore 158 17550 Sewing Machine Tutorial

threading Nelco sewing machine Google Search

Brother 211 Charger Sewing Machine Threading Diagram

http://www.sewusa.com/Sewing_Machine_Threading_Diagrams.htm

Just offhand, it appears the bobbin winder is on the lower right front and side of the machine. The spool pin in front is where the thread spool goes. The thread feeds under and up the silver button at the right. Start the bobbin by handwinding about 10 wraps of thread onto the bobbin then insert the bobbin onto the bobbin pin at the top right (just left of the rubber tire). The silver flap then snaps down over the bobbin. Release the center knob on the handwheel (turn the center counter clockwise) while holding the outer handwheel with the other hand. Then press the foot controller gently to wind the bobbin. When the bobbin is wound, remember to activate the handwheel again by turning the center wheel clockwise.

Did some research on vintage Singer models. There are some similarities to your machine, ie Singer 457 and 320.
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I would take it to the Sewing Shop. You've probably damaged whatever the needle has wedged itself into ...plus the needle and maybe the mechanism that drives the needle up and down.

I had this problem and all I did was put some sewing machine oil in behind the bobbin and it loosened up and ran like a charm.

I had this same problem and I was told to make sure the bobbin is in with the thread coming out counter-clockwise and it solved the problem for me on all three of my machines. A lot of times the needle will pick it up but you have to do a full rotation on the handwheel. I hope that helps

IMPORTANT: Always use a metal bobbin, or the magnetized bobbin case will not be able to function properly, resulting in a lack of tension on the bobbin thread.
Step 1:
Turn the handwheel counter-clockwise until the needle is in its highest position. Raise the presser foot lifter. Pull the slide plate forward and remove the empty bobbin.
Step 2:
Place the filled bobbin into the bobbin case, and pull about 4" of thread from the new bobbin. Make sure that the bobbin turns clockwise when the thread is pulled, or you will not have correct tension when you begin to sew.
Step 3:
Hold the needle thread loosely with your left hand. Turn the handwheel toward you, first lowering the needle, and continuing to turn the handwheel until the needle comes to its highest position.
Step 4:
Lightly pull up the needle thread and pick up the bobbin thread which will appear through the needle plate slot. Then pull both threads to the back of the machine leaving a 4" thread tail. Push slide plate back in.

Hope this helps. -samson39

You need to remove the needle plate and take out the bobbin case. Examine it for any rough spots, scratches or burrs. When you find them, you will need to remove them with an emery stick and then buff it with very fine steel wool. Reinstall the bobbin case and the needle plate. Put the bobbin in the machine so that it turns counter clockwise when you pull the thread. Rethread the top of the machine and change the needle. Hold the needle thread , turn the handwheel and see if the bobbin thread is picked up without snagging anyplace. If it's okay, sew away.
sewman7

check for a thread jam in and around the bobbin case.