Bobbin Case Opener for Singer – 111W (Compatible)

Replacement bobbin case for Singer sewing machines — see the fit notes below for how to confirm it matches yours. It is a compatible (aftermarket) part, not a manufacturer-original part.

What this part does

The bobbin case holds the bobbin and carries the lower-thread tension spring. It sits inside the hook race and is the part that most directly controls the balance between upper and lower thread tension. On front-loading machines it is removable and is the single most commonly replaced part after the needle; on drop-in machines it is the plastic or metal cup under the needle plate.

Specifications

How to tell if this is the right one

A bobbin case is specific to the hook assembly it was designed for. Match it by the machine models listed, and compare the shape of the latch, the position of the tension spring and the finger that locates it in the race. A case that fits the race but has the wrong finger position will throw the timing and skip stitches.

Signs you need this part

Loose or uneven lower tension that the tension screw will not correct, thread catching in the spring, a bent latch, a groove worn into the case where the thread passes, or birds-nesting that persists after re-threading and a new needle.

Fitting it

Remove the needle plate or hook cover, open the latch and lift the old case out. Seat the new one with its finger in the notch of the race, close the latch and turn the handwheel by hand one full turn before sewing.

Questions about this part

Which machines does this bobbin case fit?

The distributor's listing does not name specific models for this part, so we do not claim a fitment. Compare the specification on this page with the part you are replacing, or send us your machine's model number and we will check.

The tension screw on my old case is stripped — is a new case the fix?

Usually yes. The spring and screw are part of the case and are not normally sold separately for household machines.

Is this the same as a bobbin holder?

Drop-in machines call the cup a bobbin holder or bobbin case interchangeably. Front-loading machines use a removable case with a latch. Match by the model list, not the name.

How long does delivery take?

Orders are dispatched from our distributor's US warehouse. We do not hold stock ourselves and cannot promise same-day dispatch; current delivery estimates are shown at checkout, and we will email you if an item is back-ordered.