Fiberlogy 40D Filament Graphite 1,75 mm 500 g

Fiberlogy FiberFlex 40D Graphite Filament – 1.75 mm, 500 g

Overview

Fiberlogy FiberFlex 40D Graphite is a flexible TPU (thermoplastic polyurethane) filament designed for printing elastic and durable parts with a technical, industrial-looking finish. With a Shore hardness of 40D, it offers a good balance between flexibility and ease of printing, making it more manageable than softer TPU materials while still maintaining strong elastic properties.

Material Properties

This filament is based on thermoplastic polyurethane (TPU), known for its excellent flexibility, abrasion resistance, and durability under repeated mechanical stress. It can stretch, bend, and compress without permanent deformation. The graphite (gray) color gives printed parts a neutral, professional appearance, ideal for engineering and prototype work.

Key Features

• Shore hardness: 40D (medium flexible TPU)
• High elasticity and impact resistance
• Strong resistance to wear and abrasion
• Good chemical resistance (oils, greases, mild chemicals)
• Clean graphite gray industrial finish
• Stable extrusion for flexible filament class

Printing Recommendations

Flexible TPU requires careful tuning for best results. A direct drive extruder is strongly recommended to avoid feeding issues. Printing should be slow and controlled to ensure consistent extrusion and dimensional accuracy.

• Nozzle temperature: 220–250°C
• Bed temperature: 40–60°C
• Print speed: 20–40 mm/s
• Retraction: minimal or disabled

Best Practices

To achieve high-quality prints, maintain a clean filament path and avoid sharp bends in the feed system. Reducing retraction settings helps prevent clogging and improves flow consistency.

Applications

• Technical prototypes
• Flexible joints and connectors
• Robotics components
• Shock-absorbing parts
• Industrial functional elements

Summary

Fiberlogy FiberFlex 40D Graphite is a reliable flexible filament with a professional appearance and strong mechanical performance. It is well-suited for engineering, industrial design, and functional flexible parts where durability and a neutral color are important.