Author Topic: Bobbin specifications ? Is there a difference between the numbers ?  (Read 11364 times)

0 Members and 1 Guest are viewing this topic.

Offline adamc

  • Member
  • Posts: 213
  • Gender: Male
  • No Dogs on the Couch ! I mean it ! Off !
Bobbin specifications ?  Is there a difference between the numbers ?
Is there a physical size & diameter and bore hole/spindle hole size ?
 
I have a work in progress Singer 503A rocket. It takes #66 bobbins.
My wifes plastic kenmore takes #15J bobbins.
A lady at my work gave us a big bag of mixed old metal & plast bobbins.

I have a long sorting job ahead.

I'm an engineer, so I'm used to specificatios, sizes, ect.
is there a primer ?  it looks to me a 15J is slightly larger that a #66..

Help !

or should I just toss them and but new plastic ones (it seems like a waste-I hate to toss things)
----------------------------------------------------------
The Trouble with Doing Nothing,
Is that you can't tell if you are finished.

Offline BetsyV

  • Member
  • Posts: 5506
  • Gender: Female
  • Trillium Undulatum; Painted Trillium
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #1 on: June 29, 2011, 01:29:42 AM »
Adam I think it would be worthwhile to sort through the bag of assorted ones. Bobbins are not readily interchangeable - a Class 66 bobbin will not go into a Class 15 machine and vice versa. I don't think they will, anyway. My old Singer Futura bobbins won't fit any other series of Singer except the Futura line.

I don't recall seeing plastic Class 15 bobbins in any store, but I don't need very many of those as I use my little Kenmore 158 only for muslins. I haven't got my Singer 15-91 "on the road" right now; it's in my sewing machine museum. Please don't ask.

Offline Drama Drag

  • Member
  • Posts: 70
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #2 on: June 29, 2011, 01:33:14 AM »
Bobbin specifications ?  Is there a difference between the numbers ?
Is there a physical size & diameter and bore hole/spindle hole size ?
 
I have a work in progress Singer 503A rocket. It takes #66 bobbins.
My wifes plastic kenmore takes #15J bobbins.
A lady at my work gave us a big bag of mixed old metal & plast bobbins.

I have a long sorting job ahead.

I'm an engineer, so I'm used to specificatios, sizes, ect.
is there a primer ?  it looks to me a 15J is slightly larger that a #66..

Help !

or should I just toss them and but new plastic ones (it seems like a waste-I hate to toss things)



Yes, this would be a great help to me also if anyone could shed some helpful light on the subject. I would appreciate the information as well. Thanks.

Offline theresa in tucson

  • Member
  • Posts: 1240
  • Gender: Female
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #3 on: June 29, 2011, 01:47:26 AM »
Adam, the bobbin numbers are from the old Singer line.  Singer was the industry standard so everyone imitated them.  The class 15 bobbins were used in the 15 series machines and are probably the most common bobbins out there.  My Bernina, albeit an old one, will accept a 15 bobbin in a pinch and my new Brother Inovis 40 uses a class 15 bobbin.  I could not get the saleslady to tell me exactly what size bobbin I needed with the Brother (they want you to buy their brand specific ones) but I have been using my Singer 15s in it for two years now.  I have had other machines that used the 15 bobbin as well.  The 66 bobbin goes in a Singer 201 and several other Singers.  It is smaller than a 15 (holds less thread) and is a drop in, at least on my 201.  The 66 bobbin is almost as common as the 15.  

Can't say anything about bobbins and newer machines, other than my Brother, because I have no experience with them.  Don't toss what you were given.  If you are a machinist you will have the measuring tools to  just match them up by size to a known 15 or 66.  If you have any that don't match up you may want to pitch those or pass them on down the line. Personally, I prefer the old metal bobins to the plastic, but that is me.  Jenny, over at Sew Classic may have more information.

Offline adamc

  • Member
  • Posts: 213
  • Gender: Male
  • No Dogs on the Couch ! I mean it ! Off !
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #4 on: June 29, 2011, 01:54:58 AM »
  I'm not a machinist, but i do own some calipers and micrometers...
I will try to measure different ones, and post the results...

----------------------------------------------------------
The Trouble with Doing Nothing,
Is that you can't tell if you are finished.

Offline Drama Drag

  • Member
  • Posts: 70
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #5 on: June 29, 2011, 01:56:45 AM »
Thanks theresa in tucson, I am definately more enlightened. Bobbins were like a dark mysterious topic before your help.

@Adamc I wouldn't pitch the ones that you do not want or need, I would post them for sale either on SG or Ebay, especially if they are for the older, vintage machines.

Offline ejvc

  • Machine-Knitting Cryptographer and Plan-Bot
  • Member
  • Posts: 7386
  • Gender: Female
  • Me about age 2
    • The Fabulous Dr E's Fabulous Blog
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #6 on: June 29, 2011, 08:57:45 AM »
My machines use either 15's or 66's.  The 66 bobbin is very slightly dome-shaped, and the centre is higher than the 55.  I have 66's in both plastic and metal.  The 15 is nearly the same, but the top and bottom are perfectly flat.  Thus it's the same diameter and size at the edge but lower in the centre than the 66. Again, I have these in both plastic and metal.  The Featherweight uses something like a 2/3 height 15 bobbin, with holes all around. I forget what the number is. 

Elizabeth
My blog is at http://ejvc.wordpress.com

Sewing and machine knitting in Karlstad, Sweden!

Offline Sew-Classic

  • Member
  • Posts: 864
  • Sew-Classic
    • Sew-Classic.com
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #7 on: June 29, 2011, 10:59:17 AM »
On my store website, I have the dimensions for most of the bobbins I offer listed in the product description of each type along with some decent photos.

I also have this PDF that I made that covers the common, pre-1965 Vintage Singer Bobbins
« Last Edit: June 29, 2011, 11:08:16 AM by Sew-Classic »
"Jenny"
Sew-Classic.com
Discount Sewing Machine Parts & Supplies

Offline adamc

  • Member
  • Posts: 213
  • Gender: Male
  • No Dogs on the Couch ! I mean it ! Off !
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #8 on: June 29, 2011, 12:24:28 PM »
Hi, Sew-claasic, thanks for the info, I missed that.
last night I did measure bobbons.  The diameter is the same for both 15 & 66, same spindle hole size.

#15 Flat top & bottom.. oveall height 0.4433 inches
Interior height I measued avaraged 0.33 inches high



#66 domed top & bottom  plastic and metal were very very close. Overall height 0.421 inches
Interior height averaged 0.314 inches...


so #15 holds more thread. than the #66

If anyone is interested, I made all kinds of measurements, for the bobbins, plate thickness, ect.
yes i went overboard.


----------------------------------------------------------
The Trouble with Doing Nothing,
Is that you can't tell if you are finished.

Offline theresa in tucson

  • Member
  • Posts: 1240
  • Gender: Female
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #9 on: June 29, 2011, 03:02:58 PM »
Having several engineers in my immediate family, that is typical engineer behavior :).

Offline ejvc

  • Machine-Knitting Cryptographer and Plan-Bot
  • Member
  • Posts: 7386
  • Gender: Female
  • Me about age 2
    • The Fabulous Dr E's Fabulous Blog
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #10 on: June 29, 2011, 03:23:37 PM »
What I'm stunned by is that you'd make those measurements in inches.  :)
My blog is at http://ejvc.wordpress.com

Sewing and machine knitting in Karlstad, Sweden!

Offline adamc

  • Member
  • Posts: 213
  • Gender: Male
  • No Dogs on the Couch ! I mean it ! Off !
Re: Bobbin specifications ? Is there a difference between the numbers ?
« Reply #11 on: June 29, 2011, 11:17:47 PM »
People get confused when I speak Metric    ;D

I have a metric caliper set that I use frequently when repairing German radio sets, and other European items.

Metric wasn't even heard of when the Singer company was cranking out treadle machines, and 66's, 201's , ect.

I can't stand equipment that mixes meteric & American standard...either ONE or the other...
in the late 1970's many cars were mixed.. it made fixing them even more fun..
« Last Edit: June 29, 2011, 11:21:24 PM by adamc »
----------------------------------------------------------
The Trouble with Doing Nothing,
Is that you can't tell if you are finished.

 

Gorgeous Fabrics Fabric Mart Fabrics