MK8 Stainless Steel Extruder Feed Gear 5mm Bore

The MK8 Stainless Steel Concave Extruder Feed Gear is a high-precision upgrade designed to deliver reliable, slip-free filament drive performance for your 3D printer. Unlike standard brass gears that wear down quickly when using abrasive filaments like carbon fiber, wood-fill, or metal-fill, this gear is CNC-machined from high-grade stainless steel to ensure exceptional durability and long-lasting wear resistance.

Featuring a sharp, concave knurled profile with a 7.35mm effective diameter, this drive gear bites firmly into 1.75mm filaments without crushing them, preventing under-extrusion and slipping during high-speed prints. It comes with a standard 5mm inner bore, making it directly compatible with NEMA 17 stepper motor shafts commonly used in Creality Ender 3, CR-10, Makerbot, and various DIY RepRap 3D printer extruders. Secure mounting is guaranteed with the integrated M3 grub screw thread.

Features:

• High-Grade Stainless Steel: Offers superior wear resistance compared to brass, making it ideal for abrasive filaments.
• Concave Knurled Teeth: Provides a high-grip surface that prevents filament slippage and ensures consistent extrusion.
• Standard 5mm Bore: Perfectly fits NEMA 17 stepper motor shafts for seamless integration.
• M3 Lock Screw: Features a secure M3 threaded hole with an included grub screw to prevent shaft spinning.
• Precision CNC Machined: Ensures perfect concentricity and smooth rotation to eliminate extrusion artifacts.
• Broad Compatibility: Excellent replacement part for MK8, Makerbot, Creality, and custom DIY extruder setups.

Package Includes:

1 x MK8 Stainless Steel Concave Extruder Feed Gear

1 x M3 Grub Screw