The one that I looked at was 3mm. I like the modularity of it , Nozzle, barrel, heater, and thermistor are all separate components and can be disassembled easily. It may be my early printer days when one was pulling off the hot end every other day to fix something, or adjust something, but that ability is appealing to me. It’s a bit more spendy than you’re looking for.
I also don’t have much experience however I just purchased the E3D hotend which with shipping and all was about $75. I too was trying to stay in the 50-60 range but it was suggested to me that if I wanted to eventually print with materials other than PLA or ABS then I would want to get an all metal hotend as the ones with the plastic cool end would start to soften and mess with the print. The E3D hotend comes from Europe so it takes about a week or so to get it. Mine is supposed to be here this weekend and I ordered it on 8-29
@Mike_Ashcraft those rumors might have come from someone using a passively cooled hotend, like the Magma or Prusanozzle. The E3D has a fan that keeps the hotend’s cold end cooler than any traditional design can, so it should actually be better suited for PLA than other hotends.
I’m only printing high-temp polymers with mine, but i’m sure @Sanjay_Mortimer will be able to set this straight.
I try not to jump on threads like this and hawk my wares, but i’ll gladly jump in when asked for clarification/info. I hope that’s considered “fair” from a commercial-abuse-of-community/advertising perspective.
I’m going to repost what I recently posted in the RRForums thread when asked a near identical question:
[For context and added info, the PLA specific jamming issue was only ever reported on 1.75mm hotends, no 3mm issues]
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We certainly seemed to have nailed the 1.75mm PLA gremlins. Looking at our tech-support emails, (and the forums here) the number of questions about jamming have dropped right off the radar, and no longer do people with 1.75mm hotends running PLA seem to experience more “issues per-capita” than other configurations. Most problems now seem to stem from (most common first):
Bad cooling (fan not on full, not pointed at right part of hotend, airflow in/out blocked by some other object)
Bad filament (more complex issue, varying polymers with fillers added, bulges/kinks, and inclusion of contaminants that cause blockage of nozzle orifice)
Assembly issues (nozzle not sealed against heatbreak seems to cause jamming - exactly how this causes jams is not clear, but assembling it properly fixes the problem. Also slight bending of the heatbreak during assembly has caused a couple of issues.)
Manufacturing defects (heatbreak internal surface finish substandard, or runout on drill bit causing misalignment in bores for filament to snag on. This seems confined to a batch from v4.1, and so far no parts from v5 batches have presented with these problems.)
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On a personal front, we designed this hotend completely with PLA in mind as the primary feedstock, and we have run a LOT of PLA through about 5 of them that we use on a full time basis on personal/E3D/Day job machines and not had issues.
I’m not putting things down to just user error/bad filament, I know for certain there were some manufacturing defects in places that caused PLA only jams (had a kind customer return one by post, that absolutely would not print PLA). But so far we don’t seem to have any of the classic 1.75mm PLA jams seen in the past in the newer v5 batches.
@Sanjay_Mortimer , you’re more than welcome to hock your wares here. You’re an active part of the community, you don’t spam, you’re very helpful, you’re a developer, and all around you contribute to the whole scene positively.