Filament deflection roller (Anycubic Kobra 3 Max)

This is a smooth-running filament guide designed to reduce friction and prevent filament scraping on its way to the extruder. It features a modular 3-piece design utilizing a standard 698 ball bearing for ultra-smooth rotation.

🛠 Features & Design

• Modular Construction: Split into three distinct parts to ensure optimal print orientation and maximum strength for each component.

• Bearing-Powered: Designed to house a 698 bearing (8mm ID x 19mm OD x 6mm W) inside the roller and middle bracket for frictionless filament feeding.

• Glue-Fit Assembly: The middle bracket is permanently glued into the base to ensure a rock-solid, vibration-proof connection.

📐 Parts List (Included STLs)

1. Base.stl (The main mount that attaches to your 3D printer frame)

2. Middle_Bracket.stl (The connector piece with the integrated 8mm axle/pin that holds the bearing)

3. Roller.stl (The pulley wheel that sits on the bearing and guides the filament)

• Required Hardware: 1x 698 Ball Bearing (8x19x6 mm, e.g., 698-ZZ or 698-2RS)

• Required Tools: Superglue (CA glue) or 2-part epoxy

🖨 Print Settings

• Material: PLA, PETG, or ABS/ASA

• Infill: 20% – 30% (Gyroid or Grid recommended for structural strength)

• Wall Loops / Perimeters: 3 or 4 (Crucial for making the integrated pin on the middle bracket sturdy)

• Supports: No / None (Optimized to print support-free)

• Orientation: Print all parts flat on their designated faces for maximum strength.

🔧 Assembly Instructions

1. Press the 698 Bearing firmly into the center cavity of the Roller.

2. Slide the Roller (with the bearing inside) onto the integrated pin of the Middle Bracket.

3. Apply a small amount of superglue into the slot of the Base (or onto the mounting tab of the Middle Bracket).

4. Slide the Middle Bracket into the Base, press tightly, and let the glue cure completely.

5. Mount the fully assembled Base onto your printer.