Check the conditions alongside each answer. Foot attachment, shank type and adapter requirements are separate; one does not establish universal accessory fit.
Bobbins and hook
How is a bobbin wound?
conditional
Route thread through the guide and around the bobbin-winder pre-tension in the arrow direction, pass the tail through an inner bobbin hole, seat the bobbin and push the winding unit right. Hold the tail, run a few rotations and stop, cut the tail above the hole, resume winding, then move the unit left before removing the bobbin and cutting the thread.
Keep hands clear of moving parts; this sequence does not establish bobbin class, material, dimensions or substitutes.
Which direction and path does the bobbin thread follow?
conditional
With the needle and presser foot raised and the machine switched off, insert an evenly wound bobbin so its thread unwinds anti-clockwise, pull thread into the slit and follow the arrow markings through the guide, trim it over the cutter and replace the bobbin cover.
The diagram controls the exact thread path; this procedure does not establish bobbin class, material, dimensions, MPN, hook orientation or substitutions.
Raise the foot and needle, switch off and disconnect power, loosen the fixing screw, remove the old needle downward, then push the new needle fully upward with its flat side to the rear and tighten the screw.
Use a straight, good-quality 130/705H-system needle with a point and size appropriate to the fabric and purpose.
The presser-foot holder is removable and screw-mounted to the presser bar; reinstall it from underneath and to the left, start the screw by hand and tighten it with the screwdriver.
Remove the foot sole first and switch off the machine. Holder removal does not establish generic screw-on foot or adapter compatibility.
Raise the needle and foot, switch off and disconnect power, remove the needle, foot and stitch plate, lower the feed dog and clean it with a brush or soft cloth.
Do not use compressed-air spray; refit the removed components before sewing.
Raise the foot, switch off and disconnect power, remove the foot, needle and stitch plate, brush the bobbin case, remove it at the needle's topmost position, and brush the shuttle race. Reinsert the bobbin case, align the bobbin-case and stitch-plate markings identically, then refit the stitch plate, bobbin cover, needle and foot in that order.
Follow the source sequence exactly; the retained native proof contains the source typo "boobin" while the owner-facing instruction uses "bobbin".
For frequent use, oil the needle bar every six months: switch off and disconnect power, remove the cap, screw and headframe cover, apply one drop to the arrow-marked movement points, remove the presser foot, turn the handwheel a few times, wipe excess oil and refit the cover.
The source diagram controls the exact oil points; pay attention to exposed moving parts after the cover is removed, and do not generalize the six-month interval beyond frequent use.
How is a bobbin wound?: Route thread through the guide and around the bobbin-winder pre-tension in the arrow direction, pass the tail through an inner bobbin hole, seat the bobbin and push the winding unit right. Hold the tail, run a few rotations and stop, cut the tail above the hole, resume winding, then move the unit left before removing the bobbin and cutting the thread.
Pull the end of the thread through one of the inner holes on the bobbin
Push the bobbin to the rigth-hand position.
start the winding process for a few rotations and then stop
Cut the end of the thread above the inner hole.
Push the bobbin winding unit to the left into the starting position.
Remove the bobbin and cut the thread.
How should the bobbin and hook area be cleaned?: Raise the foot, switch off and disconnect power, remove the foot, needle and stitch plate, brush the bobbin case, remove it at the needle's topmost position, and brush the shuttle race. Reinsert the bobbin case, align the bobbin-case and stitch-plate markings identically, then refit the stitch plate, bobbin cover, needle and foot in that order.
Switch the machine off and disconnect it from the power supply system.
Clean the bobbin case with the brush.
Clean the shuttle race with the brush.
Insert the boobin case.
The markings of the bobbin case and the stitch plate must be aligned identically.
Fit the bobbin cover.
Does it accept snap-on presser-foot soles natively?: The documented presser-foot sole snaps onto the holder: place its pin beneath the holder shaft groove and push the sole upward until it engages.
Can the presser-foot holder be removed?: The presser-foot holder is removable and screw-mounted to the presser bar; reinstall it from underneath and to the left, start the screw by hand and tighten it with the screwdriver.
Removing the Presser Foot Sole
With the finger press the front edge of the presser foot.
Place the presser foot sole (2) under the shaft groove (3)
push the new presser foot sole upward until it engages
Removing and Inserting the Presser Foot Holder
Which direction and path does the bobbin thread follow?: With the needle and presser foot raised and the machine switched off, insert an evenly wound bobbin so its thread unwinds anti-clockwise, pull thread into the slit and follow the arrow markings through the guide, trim it over the cutter and replace the bobbin cover.
pull it over the thread cutter (2)
Attach the bobbin cover.
Can the presser-foot holder be removed?: The presser-foot holder is removable and screw-mounted to the presser bar; reinstall it from underneath and to the left, start the screw by hand and tighten it with the screwdriver.
Align the presser foot holder (1) with the presser foot bar (2) underneath and to the left.
screw in the screw by hand
Tighten the screw using the screwdriver.
Which way does the needle face?: Raise the foot and needle, switch off and disconnect power, loosen the fixing screw, remove the old needle downward, then push the new needle fully upward with its flat side to the rear and tighten the screw.
Does it accept snap-on presser-foot soles natively?: The documented presser-foot sole snaps onto the holder: place its pin beneath the holder shaft groove and push the sole upward until it engages.
Can the presser-foot holder be removed?: The presser-foot holder is removable and screw-mounted to the presser bar; reinstall it from underneath and to the left, start the screw by hand and tighten it with the screwdriver.
How should the feed dog be cleaned?: Raise the needle and foot, switch off and disconnect power, remove the needle, foot and stitch plate, lower the feed dog and clean it with a brush or soft cloth.
How should the bobbin and hook area be cleaned?: Raise the foot, switch off and disconnect power, remove the foot, needle and stitch plate, brush the bobbin case, remove it at the needle's topmost position, and brush the shuttle race. Reinsert the bobbin case, align the bobbin-case and stitch-plate markings identically, then refit the stitch plate, bobbin cover, needle and foot in that order.
When and where should the needle bar be oiled?: For frequent use, oil the needle bar every six months: switch off and disconnect power, remove the cap, screw and headframe cover, apply one drop to the arrow-marked movement points, remove the presser foot, turn the handwheel a few times, wipe excess oil and refit the cover.
changing the needle
changing the presser foot
switch off the machine
disconnect the power plug from the outlet
How is a bobbin wound?: Route thread through the guide and around the bobbin-winder pre-tension in the arrow direction, pass the tail through an inner bobbin hole, seat the bobbin and push the winding unit right. Hold the tail, run a few rotations and stop, cut the tail above the hole, resume winding, then move the unit left before removing the bobbin and cutting the thread.
Feed the thread through the thread guide.
Guide the thread around the bobbin winder pre-tension in the direction of the arrow.
How should the feed dog be cleaned?: Raise the needle and foot, switch off and disconnect power, remove the needle, foot and stitch plate, lower the feed dog and clean it with a brush or soft cloth.
Switch the machine off and disconnect it from the power supply system.
Remove the needle and presser foot.
Remove the stitch plate.
Do not use compressed air spray.
Clean the feed dog with the brush.
Which direction and path does the bobbin thread follow?: With the needle and presser foot raised and the machine switched off, insert an evenly wound bobbin so its thread unwinds anti-clockwise, pull thread into the slit and follow the arrow markings through the guide, trim it over the cutter and replace the bobbin cover.
Only use evenly wound bobbins.
The machine is switched off.
thread is wound anti-clockwise
Pull the thread into the slit (1).
Follow the arrow markings to bring the thread into the bobbin thread guide.
Which way does the needle face?: Raise the foot and needle, switch off and disconnect power, loosen the fixing screw, remove the old needle downward, then push the new needle fully upward with its flat side to the rear and tighten the screw.
Can presser-foot pressure be adjusted?: Presser-foot pressure is adjustable: reduce it for thick fabrics and increase it for thin fabrics.
recommended to reduce the presser foot pressure
recommended to increase the presser foot pressure
Switch the machine off and disconnect it from the power supply system.
flat side to the rear
Push the needle upwards into the needle holder as far as it will go
When and where should the needle bar be oiled?: For frequent use, oil the needle bar every six months: switch off and disconnect power, remove the cap, screw and headframe cover, apply one drop to the arrow-marked movement points, remove the presser foot, turn the handwheel a few times, wipe excess oil and refit the cover.
If the machine is used frequently, the needle bar should be oiled every 6 months
Switch the machine off and disconnect it from the power supply system.
Apply a drop of oil to the movement mechanism of the needle bar
Remove the presser foot.
Turn the handwheel a few times and remove any excess oil with a cloth.
Attach the headframe cover again.
Which needle sizes suit each fabric weight?: Use size 70 or 75 for lightweight fabrics, 80 or 90 for medium fabrics, and 100 for heavy fabrics as general manual guidance.
Needle sizes 70, 75: for light-weight fabrics.
Needle sizes 80, 90: for medium fabrics.
Needle sizes 100: for heavy fabrics.
Universal Needle
130/705 H 60-110
Unknown is not incompatible. A missing answer means the current official evidence does not support one yet.
Specifications
Documented machine facts
Multiple cited representations for one field share one row. SewGraph preserves every value and exact proof passage; it does not guess which representation is “raw” or “normalized” when the public projection does not label that distinction.
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.
bernette Category G2
bernette Accessory Category · code G2
Applies to: accessory, bobbin, needle, parts, presser foot
Open the exact OEM PDF page or captured HTML edition when a safe destination exists; otherwise SewGraph labels the OEM support-page fallback honestly.
bernette b77 instruction manual
instruction
Open official source destination · 1 unique proof passage:Proof E2
bernette accessories catalog 2025
accessory compatibility
Open official source destination · 1 unique proof passage:Proof E3
bernette accessories catalog 2024
accessory compatibility
Open official source destination · 1 unique proof passage:Proof E1
Evidence library
8 exact proof passages from 3 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 · 8 unique proof passages
Place the presser foot sole (2) under the shaft groove (3) so that the shaft groove is above the presser
foot sole pin (4).
> Then push the new presser foot sole upward until it engages.
2 supported answers and 11 answers with conditions or remaining limits. Evidence coverage is not a probability of accuracy.
Unresolved owner questions (6)
Which bobbin class, material and dimensions apply?: Not established — Not yet verified: The reviewed b77 manual pages do not state a bobbin class, material, dimensions or MPN.
What hook orientation or system does it use?: Not established — Not yet verified: The reviewed b77 manual pages do not name a horizontal/vertical hook orientation or hook system.
Which other needle systems can be substituted?: Not established — Not yet verified: No unlisted needle-system substitution is established by the reviewed b77 pages.
What shank class does the source name?: Not established — Not yet verified: The reviewed b77 pages say presser-foot bar, holder, shaft groove and sole pin but do not name a low-, high- or slant-shank class.
Will generic screw-on feet fit?: Not established — Not yet verified: The reviewed b77 pages do not establish generic screw-on presser-foot compatibility.
Which third-party adapters fit?: Not established — Not yet verified: The reviewed b77 pages do not establish any third-party adapter fit.