Premium RNC Nano Coating Hardened Steel Dual Drive Gears Kit - Upgrade for Prusa MK3/MK3S 3D Printers & DDB Sherpa Extruder - Enhanced Durability for High-Performance 3D Printing Projects

Package list (Including the parts like firt picture shows in the listing): 1. RNC nano coating Drivegear set X 1 (It is more stable and durable. The biting teeth are very sharp and not easy to slip). 2. Pulley shaft X 1(3MM*20MM) 3. Pulley bearings X 2. 4. nuts x3

The Gears (5mm bore) are made from Hardened steel material, RNC nitrogen-based chain super wear-resistant extrusion wheel

The overall hardness of the hardened steel substrate reaches HRC60+ , The more wear-resistant surface adopts RNC-based nano-coating, ultra-high hardness HV3300

Curved teeth beat 0.03mm, Which is closely matched with the shaft and has high concentricity, The driving force is 15KG. Hardened steel.

All-metal high-temperature printing at 500+℃, compatible with multiple models.

The dimensional accuracy of the inner hole is 0.02mm, which is closely matched with the shaft and has high concentricity