29 X 4TW #160/23 | 332L | 332LL | Leather Needle
The 29x4TW (also known as the 332LL, 29x4NTW, or DIx4) is a specialized industrial needle system designed for leather sewing, specifically for "patcher" machines like the Singer 29K. The "TW" (or NTW) designation refers to its Twist Point (specifically the LL-Point), which is essential for creating strong, decorative seams on tough materials.
Key Point Characteristics: The LL/TW Point
The LL (Twist Point) is a cutting point that pierces leather at a (45^{circ }) angle slanted to the left in the direction of the seam.
- Stitch Appearance: It produces a very straight seam where the thread sits slightly elevated on the surface.
- Result: The incision allows the stitch holes to be largely filled by the thread, resulting in a continuously closed and professional-looking seam.
- Best For: General leather manufacturing, including shoes, bags, and car seats.
Technical Specifications
- Needle Form: Straight needle with a single groove and scarf.
- Shank Diameter: (1.98) mm (round shank).
- Overall Length: (44.9) mm.
- Equivalent Systems: 332LL, 29x4NTW, DIx4, SY3750, 022LL.
Machine Compatibility
This system is the primary choice for heavy-duty cylinder-arm "patcher" machines used for repairs and cobbling.
- Singer: Models 29, 29-4, 29K, and 29U class.
- Consew: 29B and other patch machines