Question about Brother 929D Mechanical Sewing Machine

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The lower looper on my Brother Lock 929D came off when the screw securing it came loose. I was able to screw it back in place and it immediately fell off as soon as I began sewing. Although I've never had the screw off, it appears to just spin in the hole as if stripped. Will entire arm need to be replaced? If so, will the repair cost likely exceed the machine's worth, or could this be a DIY project?

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  • henfeather Oct 11, 2010

    Thanks for your suggestions! Of course, these things always happen at the most inconvenient times, but with any luck, your idea will at least enable me to complete the commission I'm racing against the clock to complete. Thanks for your time!



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I think that you can retap it, and use a little larger screw. If, you have a machinist friend ask him to take a look at it. Or try going to a hardware store with your machine, maybe they can give you the best advice to fix it cheaper. Otherwise, just take it in and see how much they want to do it.,We have a bike shop and sometimes we are able to retap pedal arms but without seeing it I don't know if it would work. I don't know if your machine has metric or not, but the hardware store should be able to tell you. If, it is maybe an American thread would work instead of the metric. Worth a try, I think. Good luck. I am not a professional on sewing machine and have 50+ years of sewing machine experience and just answer for free.

Posted on Oct 10, 2010

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Where do the knives go on brother 929d serger? grandson had helping hand in them coming off.

Posted on Oct 20, 2012


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Brother 1034d serger skipping stitches. Stitches are loose even when adjusting the tension.

It appears that there are two issues: skipping stitches, and, loose stitches. Let's deal with them individually but first some general points to check.
1. Change both needles for completely fresh ones out of the package. Make sure that they are inserted all the way up, this is very important. The right needle should appear longer than the left one. Make sure also that you are using the correct needles for your serger.
2. Use a good quality thread with very little stretch, almost no fuzzies, and in pastel colour. Dark thread ages quicker, therefore has a shorter shelf live. A good quality sewing machine thread is also acceptable.
3. Make sure that the tension dials are clean and free of lint or other debris.
4. Re-thread the serger in this order, keeping the presser foot in the down position at all times
a) Upper looper. Ensure that the thread is securely embedded inside the tension discs. Place the thread tail under the presser foot to 11:00 o'clock and place the presser foot down again
b) Lower looper. This is the difficult one to thread but make sure that all the thread guides are properly threaded as well as the upper looper elbow. Check that the thread is lodged between the tension discs. Once the lower looper eye is threaded, place the thread in front and over the upper looper and then under the presser foot to 11:00 o'clock and place the presser foot down again.
c) Right Needle. Thread the right needle path, again ensuring that the thread is between the tension discs. Place the thread tail under the presser foot to 11:00 o'clock and lower the presser foot.
d) Left Needle. Proceed as with left needle.
e) Double check that all tension dials have their respective threads embedded between the discs by pulling firmly up on each thread above the tension dials.
f) Check that the stitch length is set to between 2.5 and 3.0, differential to normal, blade position to middle, blade is engaged, and upper looper converter not in use.
g) Set tensions to recommended setting for 4-thread overlock.
g) Make a test stitch out. How is it? Still having the same issue/s?
If yes, continue with the items listed below, otherwise have a great time serging.

Skipping Stitches:
1. Check that the looper tips are smooth. Burrs will cause problems.
2. Check that the needles match the type of fabric being sewn.

Loose Stitches:
1. Double check threading.
2. Debris caught between tension discs will also manifest itself in loose stitches. Take an 8" X 6" piece of medium weight clean and lint free cotton fabric, fold it in half length-wise and pass the fold only firmly between the tension discs from top to bottom (with the presser foot up and no thread in the tension dials).

Re-thread and test stitch. How is it now?

Sep 30, 2014 | Sewing Machines

1 Answer

I have a two needle machine. i am currently only using the right needle, and it keeps breaking. i read that it might be because i'm not putting the needle in correctly. is there an illustrated guide...

the flat side goes toward the back of the machine. Yes, push it all the way up in the carrage, before tightening the screw.
also check the thread tension to make sure it's not to tight for the thread
also use a can of air in the looper area at least once or twice a month, depending on how much you use the machine
always keep the machine covered when not in use to keep dust out of the machine

Aug 09, 2011 | Brother 929D Mechanical Sewing Machine

1 Answer

I was serging some heavy material and I think something bent. I can't roll it forward by hand, the two arms that you thread as 1 and 2 hit each other,.

Looper timing is not for the novice, if you get it wrong and break one or the other it will cost the same as a replacement .
Pay someone to do this for you.

Aug 25, 2009 | Brother 929D Mechanical Sewing Machine

1 Answer

Lower looper

my brother lock 925d serger sewing machines threads do not overlock sitch

Sep 21, 2008 | Brother 925D Serger

1 Answer

Lower looper threader

check to make sure it is not wraping around the upper looper. just stitch without the material and you will see it. but then you must rethread the upper looper and the lower looper again in the right order. hope this helps

Apr 14, 2008 | Brother 929D Mechanical Sewing Machine

1 Answer

Please help.

I lost my foot pedal during a move. Do you know where I can find one?

Apr 05, 2008 | Brother 929D Mechanical Sewing Machine

1 Answer

No stitches 925D.

Probably your looper timing is off. This is common, and just a necessary evil of sergers. Their tolerances are tight.
The operation of creating a serger stitch is a succession of thread grabing and delivering. One looper grabs a thread and delivers it to the needle and so on.
To check this, turn your handwheel slowly and check to see that the upper looper is meeting the lower looper by passing very close to the indented part at the back of the lower looper (indented part is called the scarf, this is where the looper threads form a lock) If not, it's the looper timing. If they seem to meet properly then check your needle. Is your needle up into the needle clamp all the way? Try a new needle. Even a slight bend to the needle will not allow the loopers to meet and grab or deliver thread. You might check the tensions. Thread has to have some resistance in order for the loopers to do their job,

If your looper timing is off, find a sewing repair person to retime the serger. Don't try it yourself or put this repair off. If the loopers go further out of timing, they might hit something and replacement can be costly.

Nov 18, 2007 | Brother 929D Mechanical Sewing Machine

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