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 group · accessory, presser footBERNINA Accessory Category: BERNINA Category E / Subgroup Ea4OEM group · accessory, presser footBERNINA Accessory Category: BERNINA Category Ea4
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: presser foot (4)
Unknown is not incompatible. A missing answer means the current official evidence does not support one yet.
Parts & accessories
4 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.
4 relationships shown
presser foot · 4
Free-motion Couching Foot #43 031 779 73 00
compatibletwo-hop OEM matrix
Why this fits
Two cited hops: this machine is in BERNINA Accessory Category · BERNINA Category E / Subgroup Ea4, and the OEM matrix lists this part for that group. Region global_en. Applies to presser foot only.
Two cited hops: this machine is in BERNINA Accessory Category · BERNINA Category E / Subgroup Ea4, and the OEM matrix lists this part for that group. Region global_en. Applies to presser foot only.
Two cited hops: this machine is in BERNINA Accessory Category · BERNINA Category E / Subgroup Ea4, and the OEM matrix lists this part for that group. Region global_en. Applies to presser foot only.
Two cited hops: this machine is in BERNINA Accessory Category · BERNINA Category E / Subgroup Ea4, and the OEM matrix lists this part for that group. Region global_en. Applies to presser foot only.
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.
Open the exact OEM PDF page or captured HTML edition when a safe destination exists; otherwise SewGraph labels the OEM support-page fallback honestly.
BERNINA Accessories Catalog
accessory catalog
Open official source destination · 1 unique proof passage:Proof E1
BERNINA 7 Series PRO range brochure (EN)
machine catalog
Open official source destination · 1 unique proof passage:Proof E2
Evidence library
9 exact proof passages from 2 OEM documents
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 · 9 unique proof passages
Official OEM PDF
What this passage proves
Identity — preferred display name: B 770 QE PRO
Identity — model code: B 770 QE PRO
Category E 7 Series 5 Series 4 Series
Ea1 B 700 Eb1 B 500 Ec1 B 435
B 700 PRO
Ea2 B 720 Eb2 B 535 Ec2 B 475 QE
B 735 B 485
B 735 PRO B 495 LE
Ea3 B 740 Eb3 B 540 Ec3 B 480
Ea4 B 770 QE Eb4 B 570 QE
B 770 QE PLUS B 580 LE
B 770 QE PRO
Category E 7 Series 5 Series 4 Series
Ea1 B 700 Eb1 B 500 Ec1 B 435
B 700 PRO
Ea2 B 720 Eb2 B 535 Ec2 B 475 QE
B 735 B 485
B 735 PRO B 495 LE
Ea3 B 740 Eb3 B 540 Ec3 B 480
Ea4 B 770 QE Eb4 B 570 QE
B 770 QE PLUS B 580 LE
B 770 QE PRO
OEM program membership — BERNINA Accessory Category: BERNINA Category E / Subgroup Ea4
Item fitment path — this machine's OEM group membership for Free-motion Couching Foot #43
Item fitment path — this machine's OEM group membership for Embroidery Foot #15
Item fitment path — this machine's OEM group membership for Echo Quilting and CutWork Foot #44C
Item fitment path — this machine's OEM group membership for Embroidery Foot #26/26L
Category E 7 Series 5 Series 4 Series
Ea1 B 700 Eb1 B 500 Ec1 B 435
B 700 PRO
Ea2 B 720 Eb2 B 535 Ec2 B 475 QE
B 735 B 485
B 735 PRO B 495 LE
Ea3 B 740 Eb3 B 540 Ec3 B 480
Ea4 B 770 QE Eb4 B 570 QE
B 770 QE PLUS B 580 LE
B 770 QE PRO
OEM program membership — BERNINA Accessory Category: BERNINA Category Ea4
Category E 7 Series 5 Series 4 Series
Ea1 B 700 Eb1 B 500 Ec1 B 435
B 700 PRO
Ea2 B 720 Eb2 B 535 Ec2 B 475 QE
B 735 B 485
B 735 PRO B 495 LE
Ea3 B 740 Eb3 B 540 Ec3 B 480
Ea4 B 770 QE Eb4 B 570 QE
B 770 QE PLUS B 580 LE
B 770 QE PRO