3 mm Flex Wheel Extruder

3mm Complete Unit

Designed for 2.85 mm flexible filament (or close to anyway (+/-) 0.35 mm). The Flex Wheel automatically adjust for any variation in filament diameter. The only occasional adjustment that is required is via a simple tightening or loosening of a set of thumb screws which are designed to apply the required pressure to bend the flexible flanges into the correct shape, this ‘calibration’ is generally only required if you have opened the top hinged plate to access the internal flex wheel.

This makes the Flex Wheel incredibly easy to use, no messing around, no calibration between spools, no fiddly knobs to get just right, just load up your filament and print away.

Outstanding driving power, the 3 mm variation creates an overkill of barrel pressure within your hot end. Which makes it the best choice when you need to print a lot of polymer, a lot of volume, with high attention to detail.

Outstanding when it comes to flex, the 3 mm filament is more robust and a lot more tolerant, retraction capabilities are greatly improved. No need to turn off your retraction when printing with flex – turn it up, (which you actually need to do in order to overcome the physical compression experienced by flexible filament).

Interchangeable between Direct Drive and Bowden Cable configurations.

With 3 mm filament you can push what is possible to print, you can literally print a sponge. The extruder has been tested down to a shore A hardness of 46, it could go lower if only we could source some filament.

Bowden Cable 3 mm
Direct Drive 3 mm

What is the difference between the 3 mm and 1.75 mm models?

While the two versions are of the same in design there is a difference in the overall dimensions of the components, including – the flex wheel, the diameter of the filament feed tubes, the bending profiles and the overall tolerances of the top and bottom plates.

Video of 3 mm printing Ninja Flex (85A) 3 mm at 80 mm / sec.

Video 3 mm Printing 46A.