Hai, I own one new juki ddl 8100 ehx. So please help me to find out right needle for the following Leather, denim, cotton material. Thanks.

These may be helpful:

Juki DDL 8700 Parts

Amazon com 10 ORGAN Sewing Machine Needles JUKI DDL 8700 8700 7 555 Size...

http://www.juki.co.jp/industrial_e/products_e/apparel_e/1needle_e/ddl87007sc920cm92.html

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjly_ynvbjTAhUO-2MKHZVPDi8QFggkMAA&url=http%3A%2F%2Fwww.juki.co.jp%2Findustrial_j%2Fdownload_j%2Fmanual_j%2Fddl8700b7%2Fmenu%2Fddl8700b7%2Fpdf%2Finstruction_eg.pdf&usg=AFQjCNELa9vBuXlODt-ff-b-EfwnMWW0dQ (specifications)

Dear Rosemarie,

Make sure you have threaded the machine from right to left, it sounds like the needle thread is trapped under the lower looper thread and cannot form a stitch.........start the threading over from scratch like this:

1. Lower Looper
2. Upper Looper
3. Left Needle
4. Right Needle

Is there a diagram for how to thread on the inside of the door ?

Follow that slowly and carefully to make sure you have not missed any thread guides on the way, as each one needs to be followed through to ensure correct tension and thread progression.

Cheerup and Be Happy always

hi there
regarding your inquiry about JUKI machine model DDL-8700 , first your machine type was what ? DDL-8700/SS ( for light to medium material , DDL-8700/HS ( for jeans and can use to sew light to medium lather, type of needle is DBx1, size for lather was 18 and you can use thread number #30 and #20. one more thing you want to change your presser foot to teflon presser foot ( please see attached photo for that presser foot you want to buy.
if need more information please ask
thanks and best regards
ASHRAF ABOZID
CAIRO - EGYPT
[email protected]

Your needle probably bent and got jammed. clip threads top and bottom of the fabric and remove... then get in the bobbin area and look for issues.

Be sure you have the proper needle - it is longer than standard needles, plus be sure that you put the needle in from left to right - not...front to back.

ordinary drop feeds are not suited for sewing leather,ideally a needle feed or machine with a walking foot mechanism is best suited.if you are stuck with this machine only,there are a couple of things which may help.on some of the juki ddls there is an adjusting screw and locknut on top and in the middle of the arm of the machine .turn needle by hand wheel to bdc and loosen this screw and turn clockwise slowley! this will raise the presser foot very slightly,so when the feed dog is at tdc it can improve the feeding . spear point needles are reccommended also. one other idea,but you need a qualified mechanic to do this is to alter the feed timimg slightly on the eccentric on the top shaft.as the needle is entering the fabric,slow the timing down so the needle enters the leather just as the material starts to move. hope this helps! cheers kev w 07725903110

you should try adjusting the needle hight, the tensioners, the bobbin rension, belt tensions.

What bobbins do I use on a Juki DDL-8300

check settings

Are you using the correct type of needle? have a word with your needle supplier and explain the problem. Different threads and different thickness material need different top and bottom tension adjustments.
Can I suggest sew one thickness material at a time with tension adjustments for that thickness. Then change the tensions and do a batch of thicker material.