Non Solid Anti No Backlash Spring for TOWA Bobbin Cases M Size

Non-Solid Anti-Backlash Spring for TOWA Bobbin Cases — M Size is the tension upgrade for direction changes — the spring that keeps bobbin contact through pivots and tight curves where the stock spring momentarily lets go.

Product Details

• Fixes: Backlash — the momentary bobbin free-spin at rapid direction changes that prints as loops or uneven stitches at pivots
• How: Non-solid spring geometry maintains bobbin contact through the direction change the solid spring bounces off
• Fits: Towa M-size cases — verify for non-Towa cases before ordering
• After install: Re-tension the case (Towa gauge or drop test) — the spring changes the baseline
• Compatible: Magna-Glide pre-wounds — a favored combination for consistency

Frequently Asked Questions

What does backlash actually look like in stitching?

Tension hiccups exactly at the pivots — tiny bottom loops or a slack stitch where a feather changes direction or a spiral tightens. Straightline and gentle pantograph work never shows it; dense custom work shows it everywhere, which is why the upgrade exists.

Who needs this spring?

Custom and competition quilters — the more direction changes per inch, the more the stock spring's bounce prints. Pantograph-only studios can skip it; feather-heavy custom studios consider it standard.

Install difficulty, honestly?

Fiddly — the spring is tiny and the seating precise. Confident hands manage it in good light; many quilters hand it to their tech at the next service and never think about it again.

The re-tension step?

Non-negotiable — the new spring sits differently, so gauge or drop-test the case back to spec before the next client quilt.

Pairs with?

A spare Towa case — many studios build one case with the anti-backlash spring for custom work and keep the stock case for production, swapping whole.