A core answer does not complete every physical axis. Each field below is shown only when current accepted OEM evidence establishes it; all other axes remain explicitly unestablished.
Bobbin
Bobbin class or system
Not established in current accepted evidence
Exact OEM Bobbin part
Not established in current accepted evidence
Bobbin material and dimensions
Not established in current accepted evidence
Loading style
Not established in current accepted evidence
Bobbin case
Not established in current accepted evidence
Hook system
Not established in current accepted evidence
Important: loading style does not establish Bobbin class, hook orientation, or interchangeability.
Needle
Needle system or type
Not established in current accepted evidence
Supported sizes
Not established in current accepted evidence
Exact OEM Needle part
Not established in current accepted evidence
Needle count and insertion
Not established in current accepted evidence
Twin or special-use limits
Not established in current accepted evidence
Important: a recommendation is not an exclusive system requirement unless the OEM says so.
Presser foot
Attachment or mount
Not established in current accepted evidence
Shank or presser-bar geometry
Not established in current accepted evidence
Holder or ankle
Not established in current accepted evidence
Adapter requirement
Not established in current accepted evidence
Stitch-width and clearance limits
Not established in current accepted evidence
Dual-feed or walking-feed system
Not established in current accepted evidence
Important: a Snap-On attachment does not establish shank height, holder geometry, stitch-width family, or broad foot fitment.
Machine facets and OEM groups
Cited machine facets
Identity and compatibility badges
Identity families, physical traits, and OEM accessory groups stay separate. A group badge applies only to its named program and domains.
OEM roster group · compatibility use under reviewBaby Lock Accessory Group: Baby Lock Group I
Temporary compatibility containment
Group-derived compatibility review in progress
Compatibility under review: this OEM Group I roster membership is preserved, but SewGraph has temporarily withheld group-derived part claims because required master-shank conditions were lost in the earlier projection. Independently cited exact-model parts remain available.
Verified identity facts, cited machine traits, and independently cited exact-model relationships remain available. The held OEM roster group is shown as evidence only and currently asserts no public compatibility domain.
Review issue #56 · reviewed 2026-08-26 · recheck due 2026-09-02
Detailed specifications, compatible parts, and source library
Evidence coverage
Core answers and cited items
Machine category: Not yet established
Core domains answered: None yet
Domains with cited compatible items: bobbin (1), presser foot (2)
Unknown is not incompatible. A missing answer means the current official evidence does not support one yet.
Parts & accessories
3 documented relationships
A two-hop result joins the machine’s official accessory-group membership to the OEM part matrix. Open the evidence to inspect both hops.
3 relationships shown
bobbin · 1
Metal Bobbins - Type L BMP-BOB
compatibledirect OEM claim
Why this fits
The OEM source directly names this machine or exact scope for this part.
Group codes are namespaced to the issuing OEM program and apply only to the cited domains. They are not machine series and do not prove compatibility outside those domains.
Baby Lock Group I
Baby Lock Accessory Group · code I
Applies to: Domain not yet classified
Conditions: Group I membership is cited; part-level master-shank conditions remain under review.
Open the exact OEM PDF page or captured HTML edition when a safe destination exists; otherwise SewGraph labels the OEM support-page fallback honestly.
Baby Lock 2025 accessory brochure
accessory compatibility
Open official source destination · 1 unique proof passage:Proof E1
Evidence library
7 exact proof passages from 1 OEM document
Every passage below says exactly what visible fact it proves. Repeated references to the same locator are counted once; identity evidence never counts as compatibility evidence.
Open exact proof passages · 7 unique proof passages
Official OEM PDF
What this passage proves
Identity — preferred display name: Quilter’s Choice Pro
Master Shank (BLQP-MB)
Fits Group I
Open a world of new techniques using this innovative ankle with your
machine (BL530B, BL520B, BL500A, BLQP). The master shank allows you to
attach and use a wider variety of optional snap on feet.