RepRapDiscount Hexagon AO Hotend 1.75mm Kit with 24v Heater Cartridge

High quality kit with everything you need to replace or install a Hexagon hot end. I used this to fit my Lulzbot Taz 5 for 1.75mm filament. Works perfectly now. This was worth the investment.

Throat tube diameter is small enough that slightly chewed 1.72mm filament is a problem, However with a good extruder drive it works well and looks good doing it.

The RepRapDiscount Hexagon AO hot end has the potential to be one of the better hot ends that I have tried. Using ABS I found that the prints had a great finish and very low drip during stand-by. The large heater block on this compact and lightweight hot end allows for a longer period of heat transfer to the polymer in use, therefore a higher print speed can theoretically be accomplished. However, with PLA this thing will jam like the local band at your favorite bar on Saturday night. Reason #1: Put simply, Polylactic Acid is a starch/sugar based polymer that gets pretty sticky when hot. Solution? Seasoning the barrel with some good old cooking oil or high temp PTFE lubricant. Much like a frying pan, there has to be some sort of agent to reduce sticking. Think of an all metal hot end as a Cast Iron pan, it takes a few uses with a releasing agent in order to be fully awesome. This is the reason why many generic hot ends have an integrated PTFE liner.Reason #2: Heat CreepSolution: Install a high flow fan, or use higher TG value plastics to avoid meltdown in the heat break.EDIT: Using a higher flow fan will max out your heater control. The result is, this hot end will not even reach operating temp for PLA. I am extremely disappointed with the performance. Heat creep is so bad with a 25mm fan, resulting in a meltdown INSIDE THE PTC FITTING.The heat break appears to be aluminum I have given up on it.Use $15 PTFE hot ends unless you've got to print PC and PETG all dayIf you do- Get an E3D and stop being a hipster.RepRapDiscount provides you with some tools, 2 fans, heating element, thermistor and wiring.

Bought to replace old hotend that was snapped off due to control board failure.

Worked great as a 1.75mm retrofit onto a Taz 6 printer.Nozzle was a 0.4mm though. Caused a little bit of headache when printing fine detail.Was marked as such on the side, and a .5 feeler gauge would not go in.

I've ordered many of these. Always great quality and on time.

The hot end appears to be fine, however the kit is comes with a 12v fan which is useless in a 24v Lulzbot Taz printer which is the only reason you would need a 24v heater cartridge. The small 20mm fan has no markings so I am assuming the fans voltages are matching at 12v which is also useless because the small fan that comes with Taz printers is rated at 5v. While the hotend may be designed by Aleph Objects (Lulzbot manufacturer) the kit is definitely not.My advice to the seller is to do the research it takes when putting a kit like this together because now I have a bunch of useless fans. I am glad I caught this before I fried a fan and clogged the hot end.