Compatible Singer MO134 Parts & Accessories
Replacement parts and accessories confirmed for the Singer MO134 serger. We hold 3 items whose specification names the MO134: knives & loopers. Third-party parts made to fit this model are labeled compatible, never as the brand's own. Nothing on this page is assumed from a sibling model — if a part is here, the MO134 is named on it.
Other parts
3 parts-
Compatible
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Compatible Upper Looper for Bernette MO134; Singer 14T948DS (Compatible) Fits Bernette MO134; Singer MO134, MO134$36.99 -
Brand part
Most-replaced parts on the Singer MO134
KNIFE Bernette MO134 Singer 14T948DS Lower (A10531000, $11): the upper knife does the cutting and dulls first — a ragged or chewed edge, fabric pushing instead of slicing, or threads fraying before the loopers catch them means it is due.
LOOPER Bernette MO134 Singer 14T948DS Upper (A10431000, $32.86): a bent tip or a needle-strike burr on a looper frays thread and throws loops on one side of the stitch; loopers are handed, so the upper and lower are different parts.
Finding your model number
The model number is on the machine itself, not on the carry case or the manual — look for a plate or sticker on the front of the base, the right-hand side, the back near the power socket, or underneath. On a Singer it is printed as MO134 and the letters and suffix are part of it; a sibling model with a different suffix can take different parts.
Common problems and the part that fixes them
| Symptom | Likely part on this page | Help page |
|---|---|---|
| Edge is ragged or fabric chews instead of cutting (sergers) | KNIFE Bernette MO134 Singer 14T948DS Lower (A10531000), KNIFE Bernette MO134 Singer 14T948DS Upper (A10521000) | /help/serger-not-cutting-cleanly/ |
| Thread loops or nests on the underside | LOOPER Bernette MO134 Singer 14T948DS Upper (A10431000) | /help/thread-bunching-underneath/ |
| Skipped stitches | LOOPER Bernette MO134 Singer 14T948DS Upper (A10431000) | /help/skipped-stitches/ |
Related machines
No other model in the catalog shares a part with this one.
Frequently asked questions
Which parts do you stock for the Singer MO134?
3 items whose specification names the MO134: 3 knives & loopers. Each one is listed above with its price and whether it is the manufacturer's part, a compatible part, or an accessory cut for this model.
Are the compatible parts for the MO134 as good as the original?
A compatible part is made by a third-party manufacturer to the dimensions of the Singer part and costs less. For bobbin cases, plates, knives and feet that is usually a sensible buy; for a hook or anything with moving parts on a newer machine the manufacturer's part is the safer choice where we have it. We never describe a compatible part as the brand's own.
Upper or lower knife for the MO134?
Replace the upper knife first — it is the moving blade and wears several times faster than the lower. Replace the lower only if it is chipped. Both are listed above, each naming the position.
My MO134 needs a part that is not listed. Can you get it?
Email the part name and your model number to support@ultimatesewingandvac.com. If the distributor's catalog carries it we will quote it; if the fitment is uncertain we will say so rather than guess.
Do you ship the same day?
No. Orders are released to the warehouse the next business day and tracking is emailed when the parcel ships. We do not hold stock ourselves, so if an item is unavailable after you order we email you first.