Juki Industrial Sewing Machine Top Tension Set Assembly 40126850

The Juki Top Tension Set Assembly 40126850 is a genuine Juki replacement part designed for selected Juki industrial lockstitch sewing machines. This complete tension assembly, including the tension spring, regulates the upper thread tension to deliver balanced stitches, smooth thread feeding, and consistent sewing performance.

Designed for medium-weight sewing threads, this tension assembly allows precise adjustment to accommodate different thread types and fabric thicknesses. Replacing a worn or damaged tension assembly helps eliminate thread breakage, loose stitches, and inconsistent stitch formation.

Key Features

• Genuine Juki replacement part
• Part Number: 40126850
• Complete top tension assembly with tension spring
• Designed for medium-weight sewing threads
• Provides accurate upper thread tension control
• Promotes balanced stitches and smooth thread delivery
• Ideal replacement for worn or damaged tension assemblies

Compatible Models

• Juki DDL-8100B-7 (M Type)
• Juki DDL-8100B-7R (M Type)
• Juki DDL-8700B-7 (M Type)

Common Signs of Replacement

• Frequent upper thread breakage
• Loose or uneven stitches
• Inconsistent stitch formation
• Difficulty maintaining correct thread tension
• Visible wear or damage to the tension assembly

Package Includes

• 1 × Juki Top Tension Set Assembly with Spring (40126850)

Installation Note: Proper installation and thread tension adjustment are essential for optimal sewing performance. If you are unfamiliar with the installation or adjustment process, we recommend engaging a qualified sewing machine technician.

Need Technical Assistance?
For installation or servicing support, please contact us at +65 6776 3253.