Industrial sewing machine needles SCHMETZ DPx17 (135x17) for D leather - 10 pcs.

SCHMETZ DPx17 D also known as 135X16 TRI, DPX16, 135X17, SY 3355 are industrial sewing machine needles for leather with D (Triangular Point) triangular cutting tip. The needle tip has a triangular cross-section that provides a very strong cutting effect and a straight, pronounced stitch line. Ideal for hard, dry leather and thicker technical materials. Chrome coating reduces friction and heat, ensuring long service life under intensive use.

🧵 Suitable materials

• Hard, dry leather (including multiple layers)
• Heavy footwear, work/utility boots (e.g., safety boots)
• Upholstery and furniture padding
• Plastic, cardboard, heavy paperboard, paper

✨ Where the D needle excels

• Coarse and regular stitches in hard leather and technical materials
• Cross stitches where a secure, durable stitch is required
• Manufacture of heavy and protective footwear
• Furniture and automotive upholstery sewing
• Technical products made of plastic and cardboard

🎯 D (Triangular Point) advantages

• Strongest cutting effect among cutting points – easily cuts into hard material
• Straight stitch with a clearly visible stitch pattern
• Very suitable where mechanical strength and a secure joint are important
• Stable performance even with thicker threads and multiple material layers

🧶 Recommended threads for leather

Needle size and thread size should be chosen according to material thickness and stitch purpose – the thicker and harder the leather, the larger the needle and the coarser the thread.

🔧 Compatibility

Fits industrial lockstitch machines that use DPX17, 135X16 TRI, DPX16, 135X17, SY 3355 series needles.

Needle system equivalents: DPX17 D, 135X16 TRI, DPX16 D, 135X17 D, SY 3355 D

📐 Technical data

• CANU: 37:20MF1
• Tip type: D – Triangular Point (triangular cutting tip)
• Coating: Chrome
• Shank Ø: 2.0 mm
• Overall length: 44.0 mm
• Length to eye: 38.9 mm
• Shank flattening: none (no flattening)
• Blade shape: straight
• Number of grooves: 1
• Stitch type: Lockstitch
• Packaging: 10 needles

ℹ️ Note

The visual appearance of the stitches in the pictures refers to machines with side-twisted thread. On machines with front-twisting devices the stitch effect may vary slightly. If a milder, less aggressive stitch is required, consider other cutting points (for example, S or LR).

✅ Why these needles?

• Designed for heavy, hard leather and technical materials
• Provide a strong cutting effect and durable stitch
• Compatible with the most popular DPX17, 135X16 TRI, DPX16, 135X17, SY 3355 series industrial lockstitch machines