Which bobbins, needles and feet are listed among the standard accessories?
Before you use this answer
The accessory list does not establish replacement bobbin systems, a named needle system or third-party foot fit.
Documents and page references →Needle, bobbin & presser foot reference
Janome 423S
Needles, bobbins, feet and other details for this model. Check the requirements before choosing parts.
Before choosing a part
Compatibility essentials
Start with these documented details. Read the requirements with each answer before choosing a needle, bobbin or foot.
- Foot attachment
Place the presser-foot pin just under the holder groove, then lower the holder to lock the foot in place.
Requirements and sources →- Needle sizes by fabric and use
The needle-and-thread chart lists sizes 9/65, 11/75, 14/90 and 16/100 for different fabric and thread combinations.
Requirements and sources →
Not yet confirmed here: Manufacturer accessory group, Presser-foot shank type, Foot holder / mount, Foot interface / generation, Bobbin type / class, Bobbin material, Bobbin diameter, Bobbin height, Hook type, Needle system / designation, Maximum stitch / zigzag width, Feed system, Bobbin loading direction. What is still to confirm →
Model & names
- Model
- Janome 423S
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 sizes does the manual list, and what does it say about stretch fabrics?
Before you use this answer
Match the chart to the actual fabric and thread, test on that fabric, and preserve the fabric-specific blue-tip guidance. No formal needle system is established.
Documents and page references →How do I attach or remove the presser foot?
Before you use this answer
Read the complete needle-raising, foot-lifting and holder-release procedure. The pin-and-groove mechanism does not establish standardized or third-party fit.
Documents and page references →How do I remove, thread and reinstall the bobbin case?
Before you use this answer
Use the illustrated arrow direction on printed page 8 and the full handling procedure; no clockwise or counterclockwise label is inferred.
Documents and page references →How do I insert a replacement needle?
Before you use this answer
Follow the complete illustrated sequence and all source safety instructions for changing a needle.
Documents and page references →Manuals, parts books & more
Manuals & manufacturer documents
Available documents & sources
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 manualJanome Models 419S & 423S Instruction Book
Read the source document ↗
We checked that this file matched the source used here on 2026-10-12. The publisher may later replace its file.
Needle, bobbin & presser-foot details
Read the model-specific requirements with each answer before choosing parts.
Needle
Needle standard accessory
A set of needles is listed among the standard accessories.
Size chart
- Choose the size for the fabric/thread combination in the manual chart; test on a piece of the actual sewing fabric.
The needle-and-thread chart lists sizes 9/65, 11/75, 14/90 and 16/100 for different fabric and thread combinations.
Stretch fabric guidance
- This guidance is conditional on those fabric types and does not identify a formal needle system.
Use a blue-tipped needle when sewing stretch, very fine fabrics and synthetics.
Insertion
- Raise the needle by turning the handwheel toward you, lower the presser foot, and loosen the clamp screw counterclockwise before removing the old needle.
Insert the needle with its flat side away from you, push it up as far as it will go, and tighten the clamp screw firmly with the screwdriver.
System
Not yet verified- Not yet verified: No named needle-system designation is established by the reviewed pages.
Bobbin
Bobbin standard accessory
Bobbins are listed among the standard accessories.
Removable case procedure
- This is the manual's handling procedure, not a bobbin system or interchangeability claim.
Open the hook cover, raise the needle by turning the handwheel toward you, and take out the bobbin case by its latch. When inserting the case, place its horn into the hook-race recess.
Threading
- Follow the direction illustrated on printed page 8; no clockwise/counterclockwise label is inferred.
Place the bobbin in the case with the thread unwinding in the illustrated arrow direction. Pull the thread into the case slot, under the tension spring and into the delivery eye; leave about 10 cm (4 inches) free.
System or interchangeability
Not yet verified- Not yet verified: The reviewed instructions do not establish bobbin class, system, part numbers, dimensions, material, loading taxonomy or substitution.
Presser foot
Standard accessories
A zipper foot, automatic buttonhole foot and hemmer foot are listed as standard accessories.
Holder attachment
- To remove the foot first, raise the needle to its highest position by turning the handwheel toward you, raise the presser foot, and press the lever on the back of the holder.
Place the presser-foot pin just under the holder groove, then lower the holder to lock the foot in place.
Standardized fit
Not yet verified- Not yet verified: The pin-and-groove procedure does not establish shank height, a universal snap-on system, adapter requirements or third-party foot fitment.
Specifications & documented facts
Specifications apply to the named model and document edition. Read any setup, fabric or safety requirements with the answer.
No further specifications have been confirmed here. See the compatibility and operating answers above.
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.
Service-manual availability and service-only procedures remain unestablished unless separately cataloged and reviewed.
Coverage and source-review limits
The original source author’s manual research is reused here. Keep each model’s needle chart, fabric, thread and size restrictions, source conflicts and safety instructions separate. Related models do not establish replacement compatibility.
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.
Bobbin — System or interchangeability: Not established Full recorded limit & conditions →
Needle — System: Not established Full recorded limit & conditions →
Presser foot — Standardized fit: Not established Full recorded limit & conditions →
Other names, regional versions, production history, further specifications and documents are not fully covered here. Their absence is not a “none exist” finding.
Next evidence targets
- Establish exact foot shank and replacement mount applicability separately from the documented attachment procedure.
- Add exact bobbin replacement identifiers, dimensions and hook-system evidence without inferring fit from handling instructions.
- Establish stitch-width specifications and preserve the current source limits.
These are research questions, not claims that the missing relationship exists.
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 (6)
Janome Models 419S & 423S Instruction Book
Published by Janome · unknown_not_explicitly_established
Document text and page images were checked.
Document and available links →About this document →PDF page 5 · printed page 3
Open the source document · PDF p. 5 ↗ About this document link
Applicability and edition
Manual-global literal instructions for exact423S only; no model-exclusive419S material or universal compatibility inference.
PDF page 6 · printed page 4
Open the source document · PDF p. 6 ↗ About this document link
Applicability and edition
Exact whole-machine name in U.S. foot-control note; used only to anchor this manual to423S, not to assert controller fitment or regional equivalence.
PDF page 7 · printed page 5
Open the source document · PDF p. 7 ↗ About this document link
Applicability and edition
Manual-global literal instructions for exact423S only; no model-exclusive419S material or universal compatibility inference.
PDF page 8 · printed page 6
Open the source document · PDF p. 8 ↗ About this document link
Applicability and edition
Manual-global literal instructions for exact423S only; no model-exclusive419S material or universal compatibility inference.
PDF page 9 · printed page 7
Open the source document · PDF p. 9 ↗ About this document link
Applicability and edition
Manual-global literal instructions for exact423S only; no model-exclusive419S material or universal compatibility inference.
PDF page 10 · printed page 8
Open the source document · PDF p. 10 ↗ About this document link
Applicability and edition
Manual-global literal instructions for exact423S only; no model-exclusive419S material or universal compatibility inference.
Editorial responsibility & corrections
Alex Shick · Founder and editor. Corrections managed by Alex Shick.
This Janome 423S 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.
Contact the SewIndex team or report a correction ↗
The correction address has been tested and its monitoring confirmed. We cannot promise a response or accept every suggested change.
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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.