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Machine reference
Needles, bobbins, feet and other details for this model. Check the requirements before choosing parts.
Before choosing a part
Start with these documented details. Read the requirements with each answer before choosing a needle, bobbin or foot.
Align the foot pin with the holder notch and lower the lever until the pin snaps in. Use feet designed for this machine and follow the complete illustrated change procedure and safety warnings. This does not identify a standardized holder, shank or adapter.
Requirements and sources →Class 15 type
Requirements and sources →11.5 mm (approximately 7/16 inch)
Requirements and sources →Needle size depends on fabric and thread; the table includes 65/9–75/11 for thin fabrics and ballpoint 75/11–90/14 for stretch fabrics.
Requirements and sources →X52800-120
Requirements and sources →Not yet confirmed here: Manufacturer accessory group, Presser-foot shank type, Foot holder / mount, Foot interface / generation, Bobbin material, Bobbin diameter, Hook type, Needle system / designation, Maximum stitch / zigzag width, Feed system, Bobbin loading direction. What is still to confirm →
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.
Use the included bobbin or its exact same type. Keep X52800-120 and 11.5 mm together with the manual’s Class 15 wording; Class 15J equivalence or unrestricted substitution has not been confirmed.
Documents and page references →Keep each fabric and thread condition with its needle-size recommendation. These examples do not identify a machine-wide needle-system code.
Documents and page references →Follow the complete illustrated change procedure. Use feet designed specifically for this machine; the snap-in step does not establish a standardized shank size or universal fit.
Documents and page references →Use the complete illustrated loading procedure for this exact Aventura model.
Documents and page references →Read the full illustrated replacement procedure and safety warnings before changing the needle. Insert fully to the stopper with the flat side toward the rear.
Documents and page references →Manuals, parts books & more
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 →
InstructionDownload the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. The publisher supplies this document as a download.
Read the model-specific requirements with each answer before choosing parts.
Needle size depends on fabric and thread; the table includes 65/9–75/11 for thin fabrics and ballpoint 75/11–90/14 for stretch fabrics.
Insert fully to the stopper with the flat side toward the rear.
X52800-120
Class 15 type
11.5 mm (approximately 7/16 inch)
Place the bobbin with the thread unwinding to the left.
Align the foot pin with the holder notch and lower the lever until the pin snaps into the notch.
Use only presser feet designed specifically for this machine.
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.
These are manufacturer part references. A drawing or matching number alone does not confirm that a replacement from a seller fits. Check the model-specific listing and restrictions.
Keep the guide’s X52800-120 bobbin reference, Class 15 type wording, 11.5 mm height and included-or-same-type requirement together. Class 15J equivalence and other replacement-part or aftermarket fit have not been confirmed.
Read the bobbin number and all requirements →
Check the exact model and part before ordering. Missing information does not mean a part is incompatible.
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.
This Aventura BLMAV reference covers the specified bobbin, its loading direction, fabric-dependent needle choices and foot attachment. Read each answer with its source requirements. A machine-wide needle-system code, standardized shank, hook specification and broader substitutions are not confirmed here.
An unanswered question does not mean a part is incompatible. We have not confirmed enough information to recommend it.
Needle — System: Not established Full recorded limit & conditions →
Presser foot — Mount or 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.
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.
Published by Baby Lock
Checked against the document text.
Document and available links →About this document →PDF page 18
Download the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. Reference: PDF p. 18 in the downloaded file. The publisher supplies this document as a download.
The guide identifies Aventura BLMAV; these citations apply to that exact model and document.
PDF page 28
Download the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. Reference: PDF p. 28 in the downloaded file. The publisher supplies this document as a download.
Bobbin X52800-120, the manual’s Class 15 type wording, 11.5 mm height and included-or-same-type requirement. Class 15J equivalence is unconfirmed.
PDF page 32
Download the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. Reference: PDF p. 32 in the downloaded file. The publisher supplies this document as a download.
Bobbin thread unwinds to the left; follow the full illustrated loading path.
PDF page 40
Download the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. Reference: PDF p. 40 in the downloaded file. The publisher supplies this document as a download.
Needle choices depend on fabric and thread. The examples do not identify a machine-wide needle-system code.
PDF page 41
Download the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. Reference: PDF p. 41 in the downloaded file. The publisher supplies this document as a download.
Insert fully to the stopper with the flat side toward the rear; follow the complete replacement procedure and its warnings.
PDF page 43
Download the source PDF ↗
We checked that this file matched the source used here on 2026-10-30. Reference: PDF p. 43 in the downloaded file. The publisher supplies this document as a download.
Foot pin and holder-notch attachment. Use feet designed for this machine; a standardized shank or universal fit is unconfirmed.
Alex Shick · Founder and editor. Corrections managed by Alex Shick.
This Baby Lock Aventura 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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Answers come from the documents named on this page. They describe those editions, and may not cover later changes to the machine or manual.