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Machine reference

Baby Lock BL9

12 cited answers1 documentCoverage limits

Needles, bobbins, feet and other details for this model. Check the requirements before choosing parts.

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Before choosing a part

Compatibility essentials

Start with these documented details. Read the requirements with each answer before choosing a needle, bobbin or foot.

Needle system / designation: Read the full answer and requirements →
Needle sizes by fabric and use: See needle system / designation above →

Not yet confirmed here: Manufacturer accessory group, Presser-foot shank type, Foot attachment, Foot holder / mount, Foot interface / generation, Bobbin type / class, Bobbin material, Bobbin diameter, Bobbin height, Hook type, Maximum stitch / zigzag width, Feed system, Bobbin loading direction. What is still to confirm →

Model & names

Model: Baby Lock BL9

Other names, regional versions and related models have not been confirmed here. A shared manual, product line or accessory group does not identify the machine's family.

What do you need help with?

Which needle and size should I use on the BL9?

System and sizes →

Before you use this answer

“HAx1” appears only as the label of the supplied needle set; the manual states no other needle system, brand or substitute. Test the thread and needle size on a scrap of the fabric being sewn.

Documents and page references →

What bobbin and bobbin case does it use?

Type and case →

Before you use this answer

The manual names no bobbin class, size, material or part number and no bobbin-case part number; that is unknown, not incompatible.

Documents and page references →

How do the presser feet attach, and which feet come with the BL9?

Attachment and included feet →

Before you use this answer

Turn off the power switch before changing a foot, and use the steps on PDF page 14 (printed page 10). The manual names no shank type, mount class or foot part numbers and no feet beyond the zigzag and buttonhole feet; other feet are not stated, which is not the same as incompatible.

Documents and page references →

Which stitches can it sew, and how do I set them?

Selection and length →

Before you use this answer

Do not turn the pattern selector dial while the needle is in the fabric. The zigzag length range is printed as 0.3–4 on one page and 0.5–4 on another, and no numeric stitch width is stated.

Documents and page references →

How do I thread it?

Threading →

Before you use this answer

Switch the machine off (“O”) first. The threading order is in the manual’s numbered steps and illustrations on PDF page 22 (printed page 18); it is not rewritten here.

Documents and page references →

How often should it be oiled, and with what?

Oiling →

Before you use this answer

Turn off the power switch, and unplug the machine before removing covers or oiling. The oiling points are the arrows on PDF page 48 (printed page 44); two or three times a year is for a machine in constant use.

Documents and page references →

How do I change the needle?

Replacement procedure →

Before you use this answer

Turn off the power switch first. Use the steps on PDF page 16 (printed page 12), then check that the flat side faces away from you and the clamp screw is tight. Never use a bent or blunt needle.

Documents and page references →

How do I put the bobbin in?

Case loading →

Before you use this answer

Switch the machine off (“O”) first. Use the steps for threading the bobbin case on PDF page 20 (printed page 16) and for inserting it on PDF page 18 (printed page 14), then bring up the bobbin thread (PDF page 22, printed page 18).

Documents and page references →

How do I wind a bobbin?

Winding →

Before you use this answer

Use the winding steps on PDF page 20 (printed page 16), and push the handwheel back afterwards: the troubleshooting chart lists a disengaged handwheel as a reason the machine does not work.

Documents and page references →

How do I set the thread tension?

Tension →

Before you use this answer

Tension depends on the fabric, layers and sewing method, and each stitch page gives its own dial range. Use the manual’s guide on PDF page 24 (printed page 20).

Documents and page references →

How do I clean the hook race and feed dog?

Hook race and feed dog cleaning →

Before you use this answer

Turn off the power switch and/or unplug the machine first, as the manual says. Use the steps on PDF page 46 (printed page 42), and check that the hook and hook race ring are seated before the bobbin case goes back.

Documents and page references →

Which foot controller and light bulb does it use?

Foot controller and bulb →

Before you use this answer

Unplug the machine before changing the bulb, which could be hot. The manual does not say which foot controller model applies to which country or voltage, and gives no bulb part number or base type.

Documents and page references →

Manuals, parts books & more

Manuals & manufacturer documents

Available documents & sources

Operating manual: Instruction and Reference Guide, Model BL9 · Back cover "743-801-726 (E/F/S)" (physical 56); no other edition or revision code printed; PDF metadata created 2008-08-11, modified 2008-08-27

Publisher links below distinguish a matched file from a listing.

Choose the document for your task: an instruction manual, service manual, parts list and accessory guide answer different questions.

About this document & page references →

Instruction manual

Instruction and Reference Guide, Model BL9

Baby Lock56 pagesEnglish, Spanish, French

Edition and models

Edition: Back cover "743-801-726 (E/F/S)" (physical 56); no other edition or revision code printed; PDF metadata created 2008-08-11, modified 2008-08-27

Models referenced here: Baby Lock BL9

Read the source document ↗
We checked that this file matched the source used here on 2026-11-05. The publisher may later replace its file.

Needle, bobbin & presser-foot details

Read the model-specific requirements with each answer before choosing parts.

Needle

System and sizes

"HAx1" appears only as the label of the supplied needle set. The manual states no other needle system or brand and no substitute.
The manual says to test thread and needle size on a small piece of the fabric to be sewn, and to use the same thread for needle and bobbin.

The supplied needle set is labelled "HAx1-Size 14". The manual's thread and needle chart gives needle size 9 or 11 for light weight fabrics (for example crepe de Chine, voile, lawn, organdy, georgette, tricot), 11 or 14 for medium weight (linens, cotton, pique, serge, double knits, percale) and 14 or 16 for heavy weight (denim, tweed, gabardine, coating, drapery and upholstery fabric). When sewing stretch, very fine fabrics and synthetics, use a stretch needle.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 10 · printed page 6 Instruction and Reference Guide, Model BL9PDF page 16 · printed page 12

Replacement procedure

To check a needle, place its flat side on something flat, such as the needle plate or glass; the clearance should be consistent. Never use a bent or blunt needle.
Check needles often for barbed or blunted points: the manual says snags and runs in knits, fine silks and silk-like fabrics are permanent and almost always caused by a damaged needle.

Turn off the power switch first; the manual gives this as a caution. Then follow the manual's steps on PDF 16 / printed 12. Check when done: the flat side of the needle faces away from you, the needle is pushed up as far as it will go, and the clamp screw is tightened firmly with the screwdriver.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 16 · printed page 12 Instruction and Reference Guide, Model BL9PDF page 2 · printed page unnumbered (safety instructions)

Bobbin

Type and case

The manual names no bobbin class, size, material or part number and no bobbin case part number. That is unknown here, not incompatible.
The troubleshooting chart lists a damaged bobbin that does not turn smoothly as a cause of the bobbin thread breaking, with the remedy "Replace bobbin."; lint collected in the bobbin case is another, with "Clean the bobbin case."

Two bobbins come as standard accessories. The bobbin goes into a separate, removable bobbin case with a latch, which sits in the hook race behind the hook cover.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 10 · printed page 6 Instruction and Reference Guide, Model BL9PDF page 18 · printed page 14 Instruction and Reference Guide, Model BL9PDF page 50 · printed page 46

Case loading

Bring up the bobbin thread afterwards as described in the threading answer (PDF 22 / printed 18).

Switch the machine off ("O") first: the safety instructions say so for threading the bobbin. Then follow the manual's steps for threading the bobbin case on PDF 20 / printed 16 and for removing or inserting the bobbin case on PDF 18 / printed 14. Check when done: the thread unwinds in the direction of the arrow shown, about 10 cm (4˝) of free thread is left, and the horn of the bobbin case is placed into the recess of the hook race.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 2 · printed page unnumbered (safety instructions)Instruction and Reference Guide, Model BL9PDF page 20 · printed page 16 Instruction and Reference Guide, Model BL9PDF page 18 · printed page 14

Winding

The troubleshooting chart lists "Handwheel has been disengaged for bobbin winding" as a cause when the machine does not work (PDF 50 / printed 46).

Follow the manual's bobbin winding steps on PDF 20 / printed 16; the first step is to pull the handwheel out. Check when done: the bobbin winder spindle is returned to its original position by moving it to the left, and the handwheel is pushed back to the left (original position).

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 20 · printed page 16 Instruction and Reference Guide, Model BL9PDF page 50 · printed page 46

Presser foot

Attachment and included feet

The presser foot lifter can raise the foot about 0.6 cm (1/4˝) above the normal up position, for easier foot removal or to place heavy fabric under the foot.
The manual names no shank type, foot mount class or foot part numbers and no feet other than the zigzag and buttonhole feet. Its safety instructions say to use only attachments recommended by the manufacturer as contained in the owner's manual. Fit of other feet is not stated, which is not the same as incompatible.

Each presser foot fits a presser foot holder: the pin on the foot lies just under the groove of the foot holder, and pressing the lever on the back of the foot holder releases the foot. Turn off the power switch before changing a presser foot, then follow the manual's steps on PDF 14 / printed 10; lowering the foot holder locks the foot in place. A zigzag foot and a buttonhole foot come as standard accessories.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 14 · printed page 10 Instruction and Reference Guide, Model BL9PDF page 10 · printed page 6 Instruction and Reference Guide, Model BL9PDF page 2 · printed page unnumbered (safety instructions)

Specifications & documented facts

Specifications apply to the named model and document edition. Read any setup, fabric or safety requirements with the answer.

Care

Oiling

The safety instructions also say to always unplug the machine from the electrical outlet when removing covers or lubricating.
If the machine has stood idle for some time and does not work smoothly, the manual says to apply a few drops of kerosene at the oiling points and run the machine rapidly for one minute.

Apply a few drops of fine quality sewing machine oil to the points shown by arrows in the manual's illustrations on PDF 48 / printed 44; they are reached by removing the cap, screw and face plate. For a machine in constant use, oil two or three times a year. Wipe off the oiling points before oiling, and turn off the power switch when oiling.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 48 · printed page 44 Instruction and Reference Guide, Model BL9PDF page 2 · printed page unnumbered (safety instructions)

Hook race and feed dog cleaning

The troubleshooting chart lists lint in the bobbin case, a feed dog packed with lint and thread caught in the hook race or hook mechanism among the causes of bobbin thread breaking, poor feeding, and a machine that does not work or runs noisily (PDF 50 / printed 46).

Turn off the power switch and/or unplug the machine first. To clean the hook race, follow the manual's steps on PDF 46 / printed 42 and clean it with a brush and a soft dry cloth. Check when reassembling: the hook, held by its center pin, fits back into the hook race forming a perfect circle with the hook driver; the hook race ring's bottom pin fits into the notch; and the holders are turned back to lock the ring before the bobbin case goes back in. To brush dust and lint from the feed dog teeth, follow the steps on the same page, which start by removing the needle and the presser foot.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 46 · printed page 42 Instruction and Reference Guide, Model BL9PDF page 50 · printed page 46

Parts

Foot controller and bulb

Unplug the machine before changing the bulb, and protect your fingers: the bulb could be hot.
The manual does not say which foot controller model goes with which country or voltage, and gives no part number or base type for the bulb.
The English text prints the three models as "YC-482J YC-482J-EC or TJC-150", without a comma after YC-482J.

The manual says Foot Controller Model YC-482J, YC-482J-EC or TJC-150 is used with Sewing Machine Model BL9. Replace the sewing light bulb with the same type rated 15 Watts; the light is behind the face plate, which comes off by removing its set screw.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 10 · printed page 6 Instruction and Reference Guide, Model BL9PDF page 2 · printed page unnumbered (safety instructions)Instruction and Reference Guide, Model BL9PDF page 48 · printed page 44

Stitches

Selection and length

Do not turn the pattern selector dial while the needle is in the material.
For zigzag the stitch length dial page gives a 0.3–4 range (PDF 26 / printed 22) and the zigzag page lists 0.5–4 (PDF 32 / printed 28); both are as printed.
No numeric stitch width, maximum or adjustable, is stated; for button sewing the manual says to adjust the stitch width with the pattern selector dial.

Stitches are set on the pattern selector dial, matching the setting mark, with the needle and presser foot raised. The manual's settings are: A or B for straight stitch; C for zigzag; D for the tricot stitch; E for blind stitch hemming; A or B with the stitch length dial at "S.S." for the triple stitch; and A–E with the stitch length at "S.S." for the stretch stitch patterns. Buttonholes use the buttonhole foot and the steps on PDF 38 / printed 34. On the stitch length dial, the higher the number, the longer the stitch; straight stitch uses 1.5–4.

Sources and pages

Thread

Threading

The threading order is in the manual's numbered steps and illustrations; it is not rewritten here.

Switch the machine off ("O") first: the safety instructions say so for threading the needle. Then follow the manual's threading steps on PDF 22 / printed 18. They start with the take-up lever raised to its highest position by turning the handwheel toward you, and the presser foot raised; the needle eye is threaded from front to back. Bring up the bobbin thread with the steps on the same page; when done, about 15 cm (6˝) of both threads are pulled back under the presser foot.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 2 · printed page unnumbered (safety instructions)Instruction and Reference Guide, Model BL9PDF page 22 · printed page 18

Tension

Tension depends on the sewing materials, layers of fabric and sewing method; each stitch page gives its own range, for example 2–6 for straight stitch.

Needle thread tension is set with the thread tension dial; follow the manual's guide on PDF 24 / printed 20. If the bobbin thread shows on the top side of the fabric, the needle thread tension is too tight: move the dial to a lower number. If the needle thread shows on the wrong side, it is too loose: move the dial to a higher number. For zigzag, the upper tension should be slightly weaker than for straight stitch, with the upper thread showing slightly on the reverse side.

Sources and pages

Instruction and Reference Guide, Model BL9PDF page 24 · printed page 20 Instruction and Reference Guide, Model BL9PDF page 30 · printed page 26

Care, setup & service references

Use the full source procedure and its safety precautions. A short referenced answer is not a substitute for service documentation or qualified electrical/mechanical repair.

Replacement procedure ↗Oiling ↗Hook race and feed dog cleaning ↗

Service-manual availability and service-only procedures remain unestablished unless separately cataloged and reviewed.

Coverage and source-review limits

Answers use this model’s own instruction manual with its stated safety conditions. Where the manual contradicts itself or gives no value, no answer is given. No hands-on testing or replacement-part fit is claimed.

Coverage and remaining questions

Operating manual: Listed below; check the edition and available link.
Exact OEM part application: No model-specific part application is listed here.

Still to confirm

An unanswered question does not mean a part is incompatible. We have not confirmed enough information to recommend it.

Other names, regional versions, production history, further specifications and documents are not fully covered here. Their absence is not a “none exist” finding.

Sources and page references

Each answer links to its exact evidence passage below. Open a reference to see the document and page. These links identify the source; they do not include the full manual or its diagrams. Document access is consolidated in the OEM library above.

Document and page references (24)

Instruction and Reference Guide, Model BL9

Published by Baby Lock · Back cover "743-801-726 (E/F/S)" (physical 56); no other edition or revision code printed; PDF metadata created 2008-08-11, modified 2008-08-27 · English, Spanish, French

Checked against the document text.

Document and available links →About this document →

PDF page 10 · printed page 6

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Applicability and edition

Exact BL9 operating instruction, physical 10 / printed 6, English. Native extraction; "Sewing Machine Model BL9" names the exact machine outside any document or part number and binds this guide to BL9 only. The foot controller model codes are kept as printed (the English text has no comma between YC-482J and YC-482J-EC).

PDF page 10 · printed page 6

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. All 6 rows of the standard accessories list, physical 10 / printed 6; names and the needle-set label literal.

PDF page 2 · printed page unnumbered (safety instructions)

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. English safety instructions, warning items 2 and 14, physical 2 (unnumbered).

PDF page 2 · printed page unnumbered (safety instructions)

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Applicability and edition

PDF page 16 · printed page 12

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. The owner answer points to these steps and states only the manual's checks.

PDF page 16 · printed page 12

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. Thread and needle chart, 3 rows (light, medium, heavy weight), checked on the rendered page: needle size 9 or 11, 11 or 14 and 14 or 16 respectively. Fabric names kept as printed, including "Uphollstery".

PDF page 18 · printed page 14

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. The owner answers point to these steps and state only the seated-horn check.

PDF page 20 · printed page 16

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Applicability and edition

PDF page 20 · printed page 16

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Applicability and edition

PDF page 14 · printed page 10

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. The owner answer describes the holder, lever, pin and groove the manual names and points to its steps.

PDF page 26 · printed page 22

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference.

PDF page 30 · printed page 26

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. Settings box of Straight Stitch Sewing, physical 30 / printed 26.

PDF page 32 · printed page 28

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Applicability and edition

PDF page 34 · printed page 30

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. Settings boxes of Tricot Stitch and Triple Stitch, physical 34 / printed 30.

PDF page 36 · printed page 32

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. The only English statement on stitch width; no numeric width is printed.

PDF page 38 · printed page 34

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. Buttonhole settings box, physical 38 / printed 34; the dial positions are printed as symbols, so the answer points to the page.

PDF page 40 · printed page 36

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Applicability and edition

PDF page 42 · printed page 38

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Applicability and edition

PDF page 22 · printed page 18

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Applicability and edition

PDF page 24 · printed page 20

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference.

PDF page 46 · printed page 42

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Applicability and edition

PDF page 48 · printed page 44

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. The oiling points are shown only by arrows in the illustrations; the answer points to them.

PDF page 48 · printed page 44

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference.

PDF page 50 · printed page 46

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Applicability and edition

Only the stated document, exact BL9 model and cited English passage; no sibling, related-live-model, product-page, standardized-fit or retail-fit inference. Troubleshooting table, 9 condition rows and 33 numbered causes, row alignment checked on the rendered page: bobbin thread breaks (lint in the bobbin case: clean it; damaged bobbin: replace it); cloth not feeding smoothly (feed dog packed with lint, see page 42); machine does not work (thread caught in the hook race, see page 42; handwheel disengaged for bobbin winding, see page 16); not smooth and noisy (threads caught in hook mechanism, feed dog packed with lint, see page 42).

Editorial responsibility & corrections

Alex Shick · Founder and editor. Corrections managed by Alex Shick.

This Baby Lock BL9 guide is based on documents, with AI assistance to organize the information. We have not tested or repaired the machine.

Check the document edition with each answer. A source review date is not a machine inspection date or a promise that the manual is the latest edition.

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About this information

Answers come from the documents named on this page. They describe those editions, and may not cover later changes to the machine or manual.