Upgraded REDREX Dual Gear Extruder for Ender 3 Series and CR10 3D Printers (Compatible with Motor Shaft > 21.5mm)

UniTak3D is a professional manufacturer of 3D printer accessories, aiming to provide high-quality products for our customers. The brand is innovative and quality-driven, focusing on the design and upgrade of 3D printer accessories. Quality and innovation are the company's design philosophies, and they collaborate with the best suppliers while fully monitoring all production processes to ensure quality.

One of the latest products from UniTak3D is the REDREX dual gear extruder, which addresses several common issues with 3D printing. These include misaligned extrusion feed gears, excessive part damage from wear, missing layer extrusion, over and under extrusion, Bowden tube failure, filament damage and grinding, jammed nozzles, retraction errors, metal fragments entering the hot-end, squeaking and rattling noises, low-quality prints, and broken filament.

The REDREX dual gear extruder features several key advantages and upgrades:

1. Dual drive gear mechanism: The filament is gripped more firmly with less deformation, reducing jamming in the tube, nozzle, or hot-end.

2. Upgraded idler gear design: The idler gear is equipped with two washers on both sides, preventing the sharp gear from riding against and chewing up the bottom of the arm.

3. Spring-adjustable extruder: The extrusion spring tension can be adjusted by tightening the screw, significantly improving printing accuracy and feeding issues.

The REDREX dual gear extruder is compatible with a wide range of 3D printers, including the Ender 3 V2, Ender 3 Pro, Ender 3, Ender 3 Neo, Ender 3 V2 Neo, Ender 3 Max Neo, Ender 5 Pro, and CR10 S series. However, it is important to note that the extruder is only suitable for 3D printers with a motor shaft length of over 20mm, and users should measure the shaft length before placing an order.

Additionally, there are a few important reminders for users:

1. For 3D printers with a filament detector, as the height of the dual gear extruder may differ from the original, users may need to print a model to raise the filament detector to the same height.
2. For Vyper users, the E-steps should be calibrated from 385 to 139, and the motor wire sequence should be swapped to make the extruder turn forward instead of reverse.
3. For users of other 3D printer brands, they may need to print a custom fan shroud.

Overall, the REDREX dual gear extruder from UniTak3D offers a range of improvements and solutions to common 3D printing issues, making it a valuable upgrade for many 3D printer owners.

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