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Bobbin #15 vs #15J
For a Singer Quantum Stylist Touch
Orianna2000
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Date: 6/9/14 12:31 PM

I recently upgraded to a Singer Quantum Stylist Touch, which I'm very pleased with so far. The only issue is with the bobbins. The manual says to use Singer-brand #15. My old Singer used #15J and I thought they were the same, but when I put one in the new machine, it wouldn't sew right. Skipped stitches, looped bobbin thread---it was a disaster! I compared the two and found that the #15J bobbins have a slight curve to the top and bottom, while the #15 bobbins are flat. That seems to be the only difference.

I bought two four-packs of #15 Singer-brand bobbins from Hancock's. Since I figured I would eventually need more, I also ordered a 20-pack from Amazon: Singer-brand #15, or so they advertised. When they arrived, however, I found that these bobbins have a curve to the top and bottom, just like the #15J bobbins. So now I'm confused.

Are these bobbins supposed to be interchangeable? Did Amazon mislabel their bobbins? (More likely, since they weren't in a proper package, just a ziplock baggie with a homemade printed sticker on it.) I'm further confused by the reviews on Amazon that say #15 bobbins are for front-loaders and #15J bobbins are for top drop-ins. Both my machines were top drop-ins, yet they call for different bobbins.

Can anyone shed some light on this?

PattiAnnJ
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Date: 6/9/14 2:21 PM

Try Walmart or JoAnn where you can see the bobbins through the clear packaging.


-- Edited on 6/9/14 2:37 PM --

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"Improvise, adapt and overcome." - Clint Eastwood/Heartbreak Ridge

beauturbo
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In reply to Orianna2000 <<
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Date: 6/9/14 4:34 PM

I don't consider class 15 and class 15J safely interchangeable at all. I think that is a really bad move.

Here is why:

They are both the same diameter in roundness across, so that part is good. Now for the bad part.... A class 15 bobbin is taller and deeper and has straight across flanges on it. A class 15J bobbin, is shorter, and has slightly domed flanges on it, but not as domed or curved as a class 66 bobbin instead.

So here is what happens if you put a regular tall class 15 bobbin, into a drop into the the top sewing machine that is supposed to take a shorter (slightly domed flange) class 15J bobbin instead:

Since for every stitch you make the top needle thread has to travel over the top of the bobbin, (to even make that stitch) if your bobbin is too tall, eventually (maybe the first stitch and maybe the 40th one or 400th one or even later- it's up to fate) the thread traveling over the bobbin for each stitch, will eventual, slip under and get hooked under the too tall bobbin flange instead.

When that happens, it's a very forceful sewing event, that most times stops the machine from sewing. And very suddenly. How forceful, probably just depends on how fast you are sewing when that happens, and maybe the strength of your needle bar in a machine even.

But when that happens, sewing most times ceases, right then, and there is a huge pulling upwards force on that wrong, too tall bobbin in there, and it may be a huge thread snarl by that time too, so things that might occur, because of that kind of "wrong bobbin" forceful event, is also your needle might strike your bobbin case and break it and put needle holes in it (as it's also being tugged on and moved around, or might strike your hook and break the point of it off or ding it up or you might even untime your sewing machine, to the point it can't make any more stitches at all.

I think those are bad things, so why risk it and use a wrong kind of bobbin that is likely to even cause all that stuff?

A whole bunch of people might chime in there, and say, oh, I just ignore that, and have been using a regular tall class 15 bobbin in a machine that is supposed to take a shorter class 15J one instead. and works fine for me! Well I can believe a whole bunch of people might do that, but as long as it works it's fine they may be thinking that, but the one time that thread slips under the too tall flange on it there, and stops the whole machine from sewing with that forceful event, then it's not fine anymore, and you got one or all those issues and problems. So if you don't want any of those things ever, just don't do it.

If you by accident stick a shorter class 15J bobbin, into a machine that is supposed to take a taller Class 15 one instead, then the bobbin may be rattling around in the bobbin case (drop in or front loading) and bad things can still happen or you might not like it, but probably not as quickly or force-ably bad as the other way around at all, I would just hazzard a guess.

So be warned. For the least amount of sewing issues and machine problems, if you don't like replacing bobbin cases, smoothing out needle dings on bobbin cases and hooks and stitch plates and re-timing machines, I would for sure, respect and go along with the class 15J bobbin thing actually, and if you are supposed to use one, just do it.

That has nothing to do with any internet shopping problems at all though, as it's up to you, to put the right bobbin in your own machine, just because your hands are even on it and you are the one doing it, each time. And no matter what kind of "internet shopping confusion or problems" might be going on anyplace.


-- Edited on 6/9/14 5:01 PM --

beauturbo
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In reply to Orianna2000 <<
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Date: 6/9/14 5:44 PM

Quote: Orianna2000


Are these bobbins supposed to be interchangeable? I'm further confused by the reviews on Amazon that say #15 bobbins are for front-loaders and #15J bobbins are for top drop-ins. Both my machines were top drop-ins, yet they call for different bobbins.



Can anyone shed some light on this?

So no not interchangeable, if you got any smarts, but both would probably be able to be jammed into and fitted into the same bobbin case sometimes, so some people might do that.

Who can really explain any reviews on anything anyplace on the internet, except for maybe the person that wrote something themselves? Or what amazon says someplace unless you question the person there, that works for Amazon, that said something? I don't know!

But no, "15 bobbins are for front-loaders and #15J bobbins are for top drop-ins" is a missleading and untrue statement someplace where you see it, I would guess. Because lots of top drop in bobbin machines take and use a tall class 15 bobbin just fine and are supposed to even, just not the ones made for a shorter class 15J kind instead!

But I think amazon is just a big place that sells stuff, all kinds of stuff, and a lot of people that work at Amazon probably don't even sew at all on anything So how would they know?
Orianna2000
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Date: 6/10/14 0:17 AM

Okay, so I was definitely sent the wrong bobbins. That's what I suspected! I will return them to Amazon and buy what I *know* are the right kind from Hancock's, in person, where I can see them to verify they are, indeed, #15 and not #15J. Further, I will post a warning on Amazon to let others know the bobbins aren't the bobbins they claim to be.

Thanks for the clarification!

Connie F
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In reply to Orianna2000 <<


Date: 6/10/14 0:46 AM

Goood choice! FYI JoAnn's carries them as well. They sell them in 2 differnet size packages. I think one had 3 bobbins and the other has 8.....We found the larger pack down the aisle with all the notions not at the sewingnmachine section!

cocosloft
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Date: 6/10/14 8:04 AM

Not interchangeable! Since I am using a Quantum Stylist currently, I keep my 15's tucked away in a zip lock bag. I have so many - lots of machines will take them, including my back-up machine.

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Orianna2000
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Date: 6/10/14 10:02 AM

Sadly, we only have one JoAnn's and they're on the other side of town, about 45 minutes away. I don't get there very often, which is probably a good thing, considering how much money I spend there! I might check their website, though. Perhaps their bobbins will be more clearly labeled than the ones on Amazon.

I will definitely keep my bobbins in separate bobbin boxes, and if I can find where I hid my label-maker, I will put a little sticker on each box, so I'll know which box goes with which machine. For now, the #15 bobbin box is the one that only has three bobbins in it . . . but hopefully that will change as I get back into the swing of things!

The ironic thing is, one reason I bought the Singer Quantum Stylist Touch is because I thought it took the same bobbins as my Singer Stylist. The idea of being able to keep all my old bobbins was quite appealing! Sadly, I was mistaken. But I do love the new machine, so it's not a deal-breaker. Just an annoyance.

Buttonhook
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Date: 8/29/14 12:41 PM

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-- Edited on Today at 12:49 PM --

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