Description
B1511-772-000 Buttonhole Presser Foot (Medium Size) for Juki & Jack Industrial Buttonhole Machines
The B1511-772-000 Buttonhole Presser Foot (Medium Size), also known as B1511-772-0A0 Work Clamp Presser Foot, is a precision replacement part designed for industrial electronic and computerized buttonhole sewing machines. It forms an essential part of the work clamp assembly, securely holding fabric while the machine cuts and stitches buttonholes at high speed.
Designed for buttonholes up to 35mm–40mm, this medium-size work clamp is ideal for manufacturing shirts, uniforms, blouses, light jackets, and other garments requiring clean, consistent buttonholes. Its hardened steel construction provides excellent durability, making it suitable for continuous production environments.
Please verify the shape and measurements of your existing work clamp before purchasing.
Why Choose the B1511-772-000 Work Clamp Presser Foot?
A reliable work clamp is essential for producing professional-quality buttonholes. During the sewing cycle, this presser foot keeps the fabric firmly positioned, reducing movement while the knife cuts the buttonhole and the needle completes the stitching pattern.
The result is:
- Accurate buttonhole positioning
- Uniform stitch density
- Symmetrical buttonhole shape
- Reduced fabric shifting
- Smooth production at high sewing speeds
- Consistent quality across large production batches
Whether you’re producing dress shirts or uniforms, this medium-size clamp helps improve efficiency and finished garment quality.
Key Features
- Medium-size work clamp for buttonholes up to 35mm–40mm
- Replaces B1511-772-000 and B1511-772-0A0 assemblies
- Precision-machined for accurate fabric positioning
- Hardened industrial-grade steel construction
- Heavy-duty clamping for high-speed operation
- Reduces material movement during cutting and stitching
- Wear-resistant design for long service life
- Supports repeatable, professional buttonhole quality
- Suitable for continuous industrial garment production
- Easy installation during routine machine maintenance
Machine Compatibility
Compatible with industrial high-speed electronic and computerized straight buttonhole sewing machines, including:
Juki
- LBH-1790
- LBH-1790S
- LBH-771
- LBH-772
- LBH-780
- LBH-781
- LBH-782
- LBH-783
- LBH-791S
Jack
- JK-T1790
- JK-T781
Other Compatible Machines
Also fits equivalent computerized single-needle industrial buttonhole machines from Brother and other manufacturers that use the same work clamp assembly specifications.
Always compare your existing part number and work clamp design before ordering.
Best Fabric Types
The B1511-772-000 work clamp performs best on light to medium-weight apparel fabrics, including:
- Cotton
- Cotton knit
- Linen
- Poplin
- Oxford fabric
- Uniform fabrics
- Blouse fabrics
- Light suiting
- Shirt fabrics
- Polyester blends
Its secure clamping helps maintain proper fabric feeding for clean, consistent buttonhole formation.
Common Applications
This industrial work clamp presser foot is widely used for:
- Dress shirt manufacturing
- School uniforms
- Corporate uniforms
- Fashion garments
- Hospital uniforms
- Workwear
- Blouses
- Garment export units
- Apparel production factories
- Industrial sewing workshops
Installation Guide
- Turn off the buttonhole sewing machine.
- Remove the existing work clamp assembly.
- Clean the mounting area thoroughly.
- Install the new B1511-772-000 work clamp.
- Tighten all mounting screws securely.
- Check the clamp alignment.
- Perform a test buttonhole before production.
Machine Compatibility Table
| Machine Type | Compatible |
|---|---|
| Industrial Electronic Buttonhole Machine | Yes |
| Industrial Computerized Buttonhole Machine | Yes |
| Juki LBH-1790 Series | Yes |
| Juki LBH-771 / 772 Series | Yes |
| Juki LBH-780 / 781 / 782 / 783 | Yes |
| Juki LBH-791S | Yes |
| Jack JK-T1790 | Yes |
| Jack JK-T781 | Yes |
| Brother Equivalent Buttonhole Machines | Yes |
| Single Needle Lock Stitch Machine | No |
| TA1 Umbrella Sewing Machine | No |
Best Fabric Types
| Fabric Type | Suitability |
|---|---|
| Cotton | Excellent |
| Cotton Knit | Excellent |
| Linen | Excellent |
| Poplin | Excellent |
| Oxford Fabric | Excellent |
| Uniform Fabric | Excellent |
| Polyester Blend | Very Good |
| Light Suiting | Very Good |
How to Use
- Switch off the machine.
- Remove the worn work clamp.
- Fit the B1511-772-000 work clamp correctly.
- Tighten all fixing screws.
- Confirm proper clamp movement.
- Test on a sample fabric.
- Begin production once alignment is verified.
Frequently Asked Questions
Is B1511-772-000 the same as B1511-772-0A0?
Yes. Both part numbers are commonly used for the same medium-size work clamp presser foot assembly supplied by different manufacturers or distributors.
Which Juki machines are compatible?
This work clamp fits Juki LBH-1790, LBH-1790S, LBH-771, LBH-772, LBH-780, LBH-781, LBH-782, LBH-783, and LBH-791S industrial buttonhole sewing machines.
What buttonhole size is this designed for?
The medium-size version is designed for buttonholes measuring approximately 35mm to 40mm, making it suitable for standard shirt and outerwear applications.
Does it fit Jack buttonhole machines?
Yes. It is compatible with Jack JK-T1790, JK-T781, and other equivalent computerized buttonhole machines using the same work clamp specifications.
Why is the work clamp important?
The work clamp holds the fabric securely during cutting and stitching. Proper clamping helps prevent shifting, producing cleaner and more consistent buttonholes.
Is this suitable for home sewing machines?
No. This is an industrial spare part intended only for compatible electronic and computerized buttonhole sewing machines.
