# Concave gear wheel, MK8, 9x5x11mm, steel

> Concave MK8 gear wheel made of steel, with 9mm outer diameter, 5mm inner bore and 11mm length. Designed for the filament pusher of MK8 extruders, it provides consistent feeding and good grip on 1.75mm filament. It is fixed to the shaft using an M4 set screw.

- Page: https://sigmanortec.ro/en/concave-gear-wheel-mk8-9x5x11mm-steel
- Price: 5.01 RON
- Availability: In stock; 1-2 zile
- Reference: 9349 · EAN: 5940013417943
- Category: 3D and CNC printers > Extruders
- Specifications: Material: Otel
- Package (shipping data): 0.009 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

Concave wheel for filament pusher, compatible with MK8 extruder, ensures constant feeding and good adhesion on 1.75mm. It is made of steel for wear resistance, has an inner hole of 5mm, outer diameter of 9mm and length of 11mm. Fastening to the shaft is done quickly with M4 grub screw.
Concave wheel for filament pusher, compatible with MK8 extruder, made of steel.
Specifications:
Inner hole diameter: 5mm
Fixing method on the shaft: M4 headless screw
Outer diameter: 9mm
Length: 11mm
Compatible filament: 1.75mm