Heater Block Nozzle kit Compatible with Ultimaker 2 + UM2 Extended 3D Printer Olsson Block Hotend, Interchangeable Nozzle, 3.0mm

This nozzle set was easy to install on my Ultimaker 2. Now I can switch between 0.4 and 0.6mm very easily. I have not used the others. The reason to use 0.6 is it drastically reduces the backpressure when printing TPU (flexible filament). I use the settings by "Lost in Tech" in the "TPU Cheat Codes" video on YouTube.The old heater and sensor fit fine. Please make a note as I didn't get instructions, unlike my original hot-end, this one has a tightening screw which comes in from underneath --which is smarter. Also, make sure your nozzle is hot and empty when you install and remove them otherwise you may get some gunked up filament in there --no good. So far, by making sure I swap them this way I have not had to re-level my build plate between swaps. Last, get yourself a 7mm ratcheting wrench. Makes it much easier to screw and unscrew the hot nozzle.

I picked up a used UM2+, and ran it for a month before I started having print problems. After I figured out it was the old and crusted nozzle that it came with. I purchased this whole kit in case I needed to do a more major repair, but found these nozzles fit perfectly in the original Olson block, so I have the block on hand when I need to finally change it out.It's just really nice to have backup parts and different sized nozzles on hand, in case I ever run into a problem I'm not going to wait to have replacement parts arrive!

The original heater block screw diameter is 5.90mm, this item screw diameter is 6.0mm and the isolator nut will not fit.As a note I have a plain 'Ultimaker 2', not a 'Ultimaker 2+' or 'Ultimaker 2 extended' or any other flavors of Ultimaker 2. The item title specifies "Ultimaker 2 +". I am unsure if there are any size differences for the isolator screw nut between these models but most reviews and questions say that it works for "Ultimaker 2".If this have worked for other buyers with plain Ultimaker 2 printers then I suspect this is a tolerance issue for this part during the manufacturing process.Update: There seems to be a thermal isolator screw nut V2 from Ultimaker, I got one of these and it was a perfect fit. You might want to grab one of these newer version isolator nuts if you bought your printer shortly after release.

It came as described.It was easy to change following a Youtube video.Now, we can easily change nozzles.

Worked great in my Ultimaker 2

Needed the smaller sizes for my Ultimaker.

The block installation went pretty well. One print worked. The next print had severe warping issues unlike any I'd ever seen before, but I'm not sure how that would be a result of the new heater block and nozzle. My third print ended up encasing the new block in melted plastic. That's a pretty common fault with Ultimaker 2's fan bracket design. After cleaning off the block and the bracket, I removed the nozzle. Its threads were now filled with PLA for four or five turns, which suggests the fit between the nozzle threads and the block threads wasn't as tight as it should be. I melted the PLA out of the threads and screwed the nozzle back into the block. I turned it _by hand_ holding a 7mm socket which seemed great until it sheared off the stem of the nozzle. Now the block has the stem of the new nozzle threaded into it, so I cannot just swap out the nozzle--I have to buy a whole new block. I don't know if that's the fault of this kit or just dumb luck.

The product matched out Ultimaker