M8x60 Hobbed Bolt DIN 931 ISO 4014 for RepRap Greg's Wade Extruders

Description

This hobbed bolt is the drive component responsible for gripping and feeding filament in Greg's Wade style extruders and other RepRap-derived designs. The precision-machined hobbed section provides the traction required to move filament consistently towards the hotend.

It is manufactured from an M8x60 DIN 931 ISO 4014 grade 8.8 bolt. The hobbed section is positioned approximately 25 mm from the bolt head, making it suitable for many classic extruder designs including Greg's Wade, Prusa i3, Prusa i3 Rework and similar RepRap-based extruders.

Function within the extrusion system

The hobbed bolt works together with an idler bearing to grip the filament and feed it at a controlled rate. Proper tooth geometry improves filament traction while reducing the force required from the idler mechanism.

Key features

• M8 × 60 mm DIN 931 ISO 4014 bolt.
• Grade 8.8 steel.
• Hobbed section located approximately 25 mm from the bolt head.
• Deep hobbed teeth for improved filament grip.
• Suitable for Greg's Wade and compatible RepRap extruders.

Compatibility

Designed for Greg's Wade extruders and compatible RepRap-based extrusion systems, including several Prusa i3 variants using this drive mechanism.

Package contents

• 1 × M8x60 DIN 931 ISO 4014 grade 8.8 hobbed bolt.
• 1 × M8 DIN 985 zinc-plated lock nut.
• 3 × M8 DIN 125 A / ISO 7089 zinc-plated washers.