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Juki DDL-8700 bobbin winder not winding thread tightly

Some of my bobbins are not winding tightly when I use the bobbin winder on my industrial Juki. I know I purchased the correct bobbins, but some of them do not sit snug on the winding pin (i.e., you can set the bobbin on the pin and spin it fast with your finger, totally not fitting snug), and therefore are not winding tightly. Is there any kind of adjustment I can do to the bobbin winder so these bobbins fit snug?

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6ya6ya
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Posted on Jan 02, 2017

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  • 13 Answers

SOURCE: juki ddl-227 industrial machine

Before all else. Turn off machine!
(1) break screws on the hook loose.
(2) tighten one back up very skightly, one you can reach when the needle bar is at its lowest position.
(3) lower needle bar to its lowest position.
(4) loosen the screw just tightened.
(5) position the tip of the hook behind the needle hole. the tip should be as close to the needle hole as possible without actually touching the needle
(6) tighten screws
(7) slowly hand turn the machine (depress the foot pedal to disengage clutch brake on motor) several revolutions to make sure the needle doesn't hit anything on the hook.
(8) if it passes this test, try on a scrap of fabric

Posted on Dec 15, 2008

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  • 2 Answers

SOURCE: I just bought a used juki DDL 8500 industrial

I just bought the same machine and mine came with a photocopied manual. There is indeed a bobbin winder on the side, there's a flat section on the side of the bobbin winder closest to you, if you push that forward it connects a wheel attached to a bobbin spoke, to the belt that runs between the machine and the motor. To wind the bobbin, put the bobbin on sideways onto the axis of the wheel that is on the inside of the machine, and push the bobbin winder forward.

If you're looking for where the bobbin case is located on the machine, if you look underneath the machine on the left hand side, there should be a metal belly, on the left side of the belly is an opening, and in there sits the bobbin casing.
I think you were asking for either one of these answers, I'm on here troubleshooting for my Juki DDL-8500, good luck with yours, hopefully I can find what I need to know too!

Posted on Aug 06, 2010

  • 161 Answers

SOURCE: I recently purchased a Juki

perhaps you have the wrong needle or its not in the proper position?

Posted on Sep 12, 2010

  • 1 Answer

SOURCE: When using the automatic thread trimmer on my juki

YOU MAY SEE THREAD HANDLER HAVE SOME PROBLEM. THERE MAY BE SOME THREAD TON IN IT

Posted on Feb 27, 2011

chris592
  • 86 Answers

SOURCE: I just received my Juki

There should be a bobbin winding device next too and slighlty behind the drive belt.

Should be like this bobbin winder.

Posted on Mar 12, 2011

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1 Answer

Why isn't my bobbin threading?


Georgia, Generally it is one of two problems:


1. there is a thread stuck in the spindle where the metal disk attaches to the machine. If this is the problem, put a couple drops of oil on the spot and pull the thread loose. While you are there, you should be able to see a tiny hole at the top of the metal where the spindle runs between the disk and the bobbin. Put a couple drops of oil in that also.

2. Somehow the whole bobbin mechanism has slid forward and is not coming in contact with your belt when you engage your bobbin winder. To fix that, unscrew the two screws that attach the WHOLE METAL MECHANISM to the table. Shove the mechanism back towards the back of the machine, SLIGHTLY, and retighten the screws. After this, you might want to check to make sure that the tension on your bobbin isn't too tight. You only need minimal tension on it to wind a good bobbin.

Good Luck.

Mar 16, 2016 | Juki DDL-8700 Industrial Straight Stitch...

3 Answers

The bobbin thread on my Juki DDL-8700 is loose and bunching up. I have messed with the tension on both top and bobbin and I cant get it tightened up. Please help!


Hello Lacinda have a good day to you concern loose or missed stitches please check next: 1-try to change bobbin case with new one. 2-check timing between needle and hook by -make needle bar at lowest position and you can see two mark line at needle bar. -bring the needle bar at second line from down side then check the flat part from needle comes with tip of hook ( if yes means timing is OK , if not means you need to adjust the hook timing . 3-check the ginger guide for hook try to move it foreword or backward to pass thread smoothly. if this is helpful OK if not please send email, i try to do the best to help. best regards ASHRAF ABOZID CAIRO - EGYPT aabozid@hotmail.com

Feb 24, 2015 | Juki DDL-8700

1 Answer

Oily bobbin


Sounds like you've over oiled your machine. Take the bobbin out, strip the thread from it. wipe it down well... and re-wind the bobbin with new thread.

Next time you oil after your day of sewing. Place a piece of absorbent scrap fabric under the presser foot to catch excess drips.

Sep 27, 2013 | Juki DDL-8700

1 Answer

Bobbin winder wont wind


Is the winder wheel touching the drive belt when pushed forward. if not loosen the 2 screws that hold winder and move it so the wheel just touches the belt.

Jun 09, 2013 | Juki DDL-8700

1 Answer

Juki DDL8700 Bobbin Winder Problem


the machine should be checked by a sewing machine technican
to see what wrong with the bobbin winder, the assembly may need
to be replaced

Dec 20, 2012 | Juki DDL-8700

1 Answer

Juki ddl 8700 my machine was sewing fine I put in a heavier (jean) thread. Now it wont pick up the bobbin thread to sew at all? Help?


try changing the needle to one that will work with heavier thread
you may have to change the bobbin to heavier thread also
try adjusting the tension also

Sep 25, 2012 | Juki DDL-8700

1 Answer

I just received my Juki 8700. I new to industrial machines. How do I wind the thread onto the bobbin?


There should be a bobbin winding device next too and slighlty behind the drive belt.

Should be like this bobbin winder.

Mar 11, 2011 | Juki DDL-8700

1 Answer

I just bought a used juki DDL 8500 industrial sewing machine. It didn't come with manual. I also can't find a bobbin casing. I feel very foolish. There appears to have a bobbin winder on the side....


I just bought the same machine and mine came with a photocopied manual. There is indeed a bobbin winder on the side, there's a flat section on the side of the bobbin winder closest to you, if you push that forward it connects a wheel attached to a bobbin spoke, to the belt that runs between the machine and the motor. To wind the bobbin, put the bobbin on sideways onto the axis of the wheel that is on the inside of the machine, and push the bobbin winder forward.
If you're looking for where the bobbin case is located on the machine, if you look underneath the machine on the left hand side, there should be a metal belly, on the left side of the belly is an opening, and in there sits the bobbin casing.
I think you were asking for either one of these answers, I'm on here troubleshooting for my Juki DDL-8500, good luck with yours, hopefully I can find what I need to know too!

Feb 07, 2010 | Juki DDL-8300

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