SCHMETZ 135x17 | DPx17 DI industrial sewing machine needles - for leather (10 pcs.)

SCHMETZ DPx17 DI needles for industrial sewing machines, also known as 135X16 DIA, DPX16 DIA, 135X17 DIA, SY 3355 DIA there are needles for skin with DI (Diamond point) cutting tip. This type of tip has a diamond-shaped cross-section, and the cut in the material is made at a 90° angle to the direction of the thread. As a result, the seam is very straight, slightly recessed (recessed), with a precise, firm stitch line without needle deflection even in hard, dry leather.

🧵 Suitable materials

• Stiff, dry natural leather
• Rigid synthetic leather and composite materials
• Multi-layer leather goods
• Thick, stiff leather parts – soles, belts, inserts, etc.

✨ Where DI really shines

• Very straight, “recessed” seams that do not protrude above the leather surface
• Normal and coarser decorative seams with a clear stitch pattern
• Seams in shoes, bags, and suitcases where maximum precision is required
• In areas where it's important that the needle doesn't deflect and doesn't "lift" the material

🎯 DI (Diamond point) benefits

• 4 cutting edges – the needle pierces heavy, hard leather more easily
• No needle deviation – the stitch follows a linear pattern, ideal for perfectly straight seams
• Clean, professional stitch appearance without snagging the fabric
• Very straight seam – unlike the LR/VR angled decorative seams

🧶 Thread recommendations for leather

Choose the thread size based on the leather thickness and the desired seam definition:

• For coarser decorative seams (in bags, suitcases, footwear): polyester / polyamide tex 75–150 (No. 20–8) with needles NM 120–200
• For regular and medium-coarse seams: polyester tex 50–75 (No. 40–30) with needles NM 110–140

🔧 Compatibility

Suitable for industrial straight-stitch (lockstitch) for sewing machines designed for the DPX17, 135X16, DPX16, 135X17, SY 3355 needle system.

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

📐 Technical data

• CANU: 20:05KJ1
• End type: DI – Diamond point (rhombus-shaped, cut 90° to the thread direction)
• Coating: Chrome
• Shank Ø: 2.0 mm
• Total length: 44.0 mm
• Length to eye: 38.9 mm
• Shank flat: without flattening
• Blade shape: straight
• Number of grooves: 1
• Stitch type: Lockstitch (straight stitch)
• Packaging: 10 needles
• Available sizes: NM 110–200

ℹ️ Note

The final look of the seam also depends on machine settings, thread type, and leather texture. If you want a visually "softer" decorative stitch or one slanted in a different direction, also consider LR/VR or S-type cutting-point needles.

✅ Why choose SCHMETZ DPx17 DI?

• Excellent straight, recessed seam for heavy skin
• Four-cutting-edge design provides easy fabric penetration and stable stitching
• A reliable choice for shoes, bags, suitcases, and other hard leather products ražošanai
• SCHMETZ quality – designed for intensive, professional industrial sewing