1.75mm Assembled Titan Extruder for FDM 3D Printer Accessory Bowden mounting Bracket Supporting Remote/Short Printing

I had a strange blowout on the bowden coupling on my original Titan clone extruder on my Tornado. Since I had one of these in my spare parts drawer I just swapped this in so I could get the printer up again quickly. Mine was almost fully assembled and I didn't need to do much of what was outlined in the instructions. Screwed right in to the mount using the bolts from the original extruder.Did a few test prints that looked pretty good, then had a couple with very poor extrusion. The screw that adjusts the tension on the hob was backed out as far as it could go and I eventually ended up tightening it to about 80% of the maximum tension. On my Tornado access to the screw was very poor and I had to remove it from the mount to adjust it easily. That's not an issue as the extruder is very easy to remove and re-install.Most likely I'll upgrade to a Bondtech BMG an the Tornado this weekend and the extruder will find a new home on my Ender 3.

I like these extruders as for the price they work well and with a little PTFE tubing and some glue (E6000 is what I had on hand) you can make them work great even for flexible filament. I use one for direct drive on my Tronxy X5s and another on my Micromake D1 Delta with probably 18” (~450mm) of Bowden tube. What kills me is that with just slightly different plastic molds this could be great out of the box. Stock they’re still pretty good for non-flex filaments even if a few parts are a little wobbly.

We ordered 10 of these for use in our university class on 3d printer design and construction. All 10 had a number of serious flaws, bad enough to border on unusable by the students. The biggest problem is that the hobbed wheel is too long -- when the clear cover is attached and tightened it warps badly and prevents the extruder from turning. We had to hunt for a combination of loose and tight screws that didn't bind up. In some cases there was no such point.The second major problem is that the recess for the hot-end heatsink is too large. No matter what we tried (we have LOT of hot-ends) they wobbled excessively. Again, shoddy workmanship.Cheap is cheap, but this is REALLY CHEAP! If you care about your printer buy a better quality part.

Honestly, even though it's all plastic (aside from some screws and a gear), it'd get five stars if it wasn't for two problems.1) The install is not intuitive. To clarify, physical installation isn't hard to figure out. However, there's zero guidance given regarding what firmware changes are needed to make this work. If you're using Marlin, make sure you reverse the step direction for the extruder, and change the extruder steps to 400. It took some figuring out for both, not rocket science but enough to frustrate you if you don't know what to look for or how to calibrate it.2) The screw that the tension spring is fitted on is not adjustable - it looks like they soldered over it to make it a flat surface rather than one you could put a tool into (like a screwdriver). The default spring tension isn't enough to push filament through a .4mm nozzle, much less anything smaller, and adjusting it requires disassembly. Do yourself a favor before you install it, take off the clear cover and replace the screw for the tension spring with something you can adjust after assembly. It makes it much easier to do.Other than that, works well. I've used it on several large print jobs, one for a .6mm nozzle and another for .2mm. No issues.

Once installed and calibrated, this extruder is awesome. If you have any knowledge of extruders this should be fairly simple to install. Also don't forget to calibrate esteps and reverse the stepper motor direction in your software.

Had to do some minor adjustments using a file to get rid of plastic that was causing interference with the gears. For the price I dont expect perfection but rather a functional product. I haven't got to printing anything yet but once everything is calibrated I'll update this review.Update: after installation and calibration the first test print was a success. Other than filing off excess from supports sanding was not necessary. The picture provided was taken after 2 coats of acetone were applied using a brush and dried.

I read some of the reviews and took a chance and was surprised with perfect direct plug and play for Tevo Tornado and I order 2 more to have on hand and can not beat the PRICE!!

Warning: This extruder is not compatible with the Creality Ender 3. It will not fit on the stock motor.The stock/factory NEMA stepping motor screw holes do not line up with this extruder once you push the smaller mesh gear onto the motor shaft. You can't mount it through the stock mount (although they do provide you with another mount). I'm probably going to return this.It's also very plastic in its construction. YMMV.