This B1511-773-0A0 Buttonhole Presser Foot is built for 781-style industrial buttonhole machine where firm fabric clamping and stable positioning are essential for clean, consistent buttonhole stitching.

Its large-size slot configuration makes it suitable for buttonholes used on shirts, trousers, uniforms, jackets, suits, and other garments requiring dependable work-clamp control.

Key Features

• High-precision work clamp design for stable fabric positioning.
• Large-size slot configuration for larger buttonhole lengths and widths.
• Hardened high-grade steel construction for repeated industrial use.
• Smooth polished underside helps reduce fabric snagging and surface marking.
• Direct OEM-spec replacement design for standard 781-style work clamp arm holders.
• Suitable for woven fabrics, cotton, denim, dress pants, uniforms, suit jackets, and outerwear.
• Pack contains 1 piece.

Use Cases

This buttonhole presser foot is designed for demanding garment-production applications where the fabric must remain firmly positioned throughout the buttonhole cycle.

It is suitable for:

• Garment manufacturing units
• Uniform production
• Shirt and trouser stitching
• Suit and formalwear production
• Boutique tailoring
• Professional tailor shops
• Industrial sewing-machine repair and replacement work

Benefits

Stable Fabric Clamping

The work clamp holds the material securely during the buttonhole sequence, helping prevent fabric movement that can affect stitch positioning.

Suitable for Larger Buttonholes

The larger slot configuration supports buttonhole applications used on jackets, trousers, formalwear, and other garments requiring larger buttonhole dimensions.

Built for Repeated Use

The hardened steel construction is designed to withstand repeated mechanical clamping cycles in busy sewing environments.

Cleaner Fabric Contact

The smooth underside provides controlled contact with the garment surface and helps reduce unnecessary snagging or marking during operation.

Straightforward Replacement

The OEM-spec configuration is made for installation on compatible 781-style work clamp arm holders, making it a practical replacement for a worn or damaged existing part.

Machine Compatibility

This is a machine-specific buttonhole work-clamp attachment compatible with:

Part Number: B1511-773-0A0 / B15117730A0 / B1511-773-A

Specifications

How To Use

First, switch off the buttonhole machine and raise the work-clamp mechanism before removing the existing attachment.

Next, remove the worn or damaged presser-foot/work-clamp attachment from the compatible 781-style clamp holder.

Then, position the B1511-773-0A0 attachment correctly on the work-clamp arm holder and secure it according to the machine’s assembly arrangement.

Finally, test the clamp movement manually before sewing, then run a sample buttonhole on scrap fabric to confirm proper clamping, alignment, and clearance.

FAQs

Is this presser foot compatible with Juki LBH-781?

Yes. The B1511-773-0A0 buttonhole work-clamp attachment is compatible with the Juki LBH-781 and listed LBH-771, LBH-772, LBH-780, LBH-782, and LBH-783 series. It is designed for the 781-style industrial buttonhole mechanism and should be matched against the existing part before replacement.

Does it fit the Jack JK-T781 buttonhole machine?

Yes. This work-clamp attachment is compatible with the Jack JK-T781 buttonhole machine. The important check is the clamp-holder arrangement and existing part number because buttonhole machines can use visually similar attachments with different mounting configurations.

What is the part number of this buttonhole presser foot?

The primary part number is B1511-773-0A0. It is also referenced as B15117730A0 and B1511-773-A. Matching the complete part number with the existing component is recommended when replacing a worn work clamp, particularly when purchasing a spare for production equipment.

Can this attachment be used for denim and trousers?

Yes. It is suitable for woven garment materials including denim and dress-pant fabrics. Its firm clamping action is useful where heavier or less flexible material needs to remain stable during the buttonhole cycle. Always verify that the selected buttonhole machine configuration is appropriate for the material thickness.

Is this a complete buttonhole machine?

No. This is a single buttonhole presser foot/work-clamp attachment, supplied as 1 piece. It is a replacement machine part rather than a complete sewing machine or complete work-clamp mechanism. Check the part number and mounting arrangement before ordering.

Is installation complicated?

The attachment is designed as a direct replacement for compatible 781-style work-clamp holders. Installation involves removing the existing attachment and securing the replacement correctly. After installation, manually check clamp movement and run a test buttonhole before returning the machine to production.

What fabrics can be used with this presser foot?

It is suitable for common garment textiles including cotton, woven fabrics, denim, dress pants, uniforms, suit jackets, and outerwear. The clamp’s purpose is to hold material securely during the buttonhole operation; the final fabric suitability also depends on the machine setup, needle, thread, and buttonhole settings.

What should I check before ordering?

Check the part number, existing work-clamp shape, mounting arrangement, and machine model before purchasing. B1511-773-0A0 is intended for 781-style industrial buttonhole equipment, but matching the existing part is the safest way to avoid ordering an incompatible attachment.