B0421S03A Bias Binder 28mm for Babylock Coverstitch, Evolve, Evolution, Ovation & Gloria

The Baby Lock Double Fold Bias Binder (Part Number: B0421S03A) is a professional-grade attachment designed to streamline the binding process. It automatically folds a 28mm (1-1/8") raw fabric strip into a clean, double-folded 7mm finished edge while securing it to the fabric in a single step.
Sewing Applications
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Garment Edge Finishing: Binding curved raw necklines, armholes, or decorative collars on knit and woven apparel.
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Hems & Cuffs: Finishing sleeves, pant hems, or jackets cleanly.
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Quilting & Home Décor: Applying narrow, uniform double-fold borders onto placemats, light quilts, or apron straps.
Recommended Application Methods
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Secure Attachment: Mount the binder directly onto the machine's base plate using the designated guide fixing screws.
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Strip Preparation: Cut your 28mm fabric strip on a true 45-degree bias. Snip the starting end into a sharp angle (“<” shape) to ease insertion.
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Threading the Tool: Slide the strip into the binder wrong-side facing you, using tweezers or a stiletto to pull the tape under the presser foot.
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Stitch Selection: Utilize a chain stitch (C3 position) or a narrow cover stitch (C2-C3) for the best results.
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Alignment Testing: Sew a short test strip to ensure the right needle catches the double-fold edge precisely before feeding your project fabric into the folder slot.
Applicable Machine Models
Baby Lock Triumph & Gloria Series
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Triumph (BLETS8)
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Gloria (BLETS8)
Baby Lock Ovation & Evolution Series
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Ovation (BLES8 / BLE8)
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Evolution (BLE8W-2)
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Evolve (BLE8)
Baby Lock Coverstitch & Sashiko Series
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Coverstitch (BLCS / BLCS-2)
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Sashiko & Sashiko 2 (BLQK / BLQK2)
Q&A Scenarios
My binder is skipping stitches when transitioning across intersecting seams. How can I stop this?
Solution: Trim or hammer bulky bulk seams flat before feeding them. When approaching a seam intersection, reduce your sewing speed to slow-to-moderate and gently guide the project forward.
The top fold looks perfect, but the underside is missing the needle entirely. How do I correct this?
Solution: Loosen the attachment fixing screws and micro-adjust the binder slightly to the left or right. Test until the right-side needle consistently pierces both the top and bottom folds.
Can I use heavy fabrics or thick canvas strips with this specific attachment?
Solution: No, the B0421S03A is specifically engineered for light to medium-weight woven or knit fabrics. Heavy canvas will jam the tight folding funnel.
Safety Precautions
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Power Off During Installation: Always switch off the machine's power before screwing or adjusting the binder to prevent accidental needle punctures.
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Mind the Tweezers: Keep tweezers, pins, or stilettos clear of the moving needle bar when pushing fabric strips through the funnel.
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Control Speed: Never rush high-speed sewing; maintain a slow, steady rhythm to stay in complete control of fabric alignment.
- Original parts for Babylock model:
- Evolve (BLE8W-2)
- Evolution (BLE8W-2)
- Ovation (BLE8)
- This double fold bias binder will turn fabric strips into binding and attach it to project edges all in one step.
- Raw Tape Width: 28mm
- This attachment is exclusively for the cover-stitch and Evolve, and is perfect for curved edges, collars, and necklines on knit or woven fabrics.
For 1 - 1/2
STITCH USED :
- Chain Stitch - C3 Needle Position
- Narrow Right Cover Stitch : C2 - C3
- Type Application : Binding the edge of projects.
- Fabric Used : Light weight to medium weight woven fabrics cut on bias.
FOR 1-1/8 inch Binder:
STITCH USED :
- Narrow right cover stitch C2-C3
- Chain Stitch - C3 Needle position
- Sewing Speed : Slow to moderate
INSTRUCTION :
STITCH LENGTH: 3-4
- Upper Knife : Disengaged " LOCKED "
- Upper Looper : Down
- Sewing Table : On
BAISE STRIP CUT SIZE :
1-1/ 8 inch Binder:
- Cut 1-1/8 inch bias from fine fabric such as calico, muslin etc.
- Cut 1 inch wide for medium weight fabric such as trigger, it wt. denim
1-1/2 inch Binder :
- Cut 1-3/9 inch for fine fabrics such as calico , muslin , etc .
- Cut 1-1/4 inch wide for medium weight fabrics such as trigger , it . wt . denim.
TEST WITH FABRIC STRIP TO MAKE SURE OF CORRECT WIDTH OF BIAS .
- Secure attachment to table with guide fixing screws.
- cut fabric strip to size needed.
- Raise presser foot . with the point of the bias strip, place strip into attachment.
- use tweezers to feed the strip into the attachment.
- Place the folded bias up to the needles and under the presser foot .
- turn the hand wheel 3-4 timed to secure the stitching in the fabric.
- Place the fabric that is to be bound into the slot of the attachment. Place in the folded bias in the front of the presser foot .
- Loosen the guide fixing screws and move the attachment right or left to align the attachment with the needle position.
- Sew test for proper alignment before sewing on the project.