Hello, People requested bullet points as to why Genuine J-Heads are the best hot-ends. Here goes! 1. Fast. Speeds over 200 mm/sec have been printed with a 0.4mm nozzle. 2. Light Weight. Total weight is under 30 grams and some models are under 20 grams. 3. Prints most filaments. Most filaments can be printed with a Genuine J-Head. 4. Prints at lower temperatures. Genuine J-Heads are morby reifsnyderb - General
Hello, Please feel free to try developing and selling hot-ends and let me know how it works out for you. I've made hot-ends since around 2008 or 2009 and literally been told to create new designs so that people can buy chinese knock-offs. The J-Head Mk 9 is only a prototype because of this reason and the fact that china can sell hot-ends for around the price of the raw materials and includeby reifsnyderb - General
Hello, The best chance for new hot-end technology, such as by using an induction heater, is in the hands of the hobbyist. The problem is that if somebody develops a new hot-end, it is copied by the chinese. Then, most people buy the cheap chinese copies. So, there is no incentive for a company to create an induction heater hot-end to add to china's profit margin. R&D costs money. Giveby reifsnyderb - General
Real J-Heads, from , are very very good at printing PLA.by reifsnyderb - General
The greater the support for "clones" and "knock-offs" from china the less incentive for anyone to develop anything new. China copies and does not develop.by reifsnyderb - General
Hello, I wanted to add that this is not a real J-head. Real J-heads are like these --> There was no such thing as a J-Head V6. Brianby reifsnyderb - General
Still some left...by reifsnyderb - General
Hello, The J-Head Mk 8 weighs 18 grams and is 50mm long. 40mm projects below the mounting groove. The Mk 8 does not have a built-in PTC connector. Best Regards, Brianby reifsnyderb - General
Hello, For starters, a real J-Head doesn't require a cooling fan on the hot-end. (It is recommended for PLA; but, not required.) The use of the PTFE liner up to the melt zone results in lower extrusion pressure. J-Heads also will print PLA at slightly lower temperatures than e3d's. Here is a web page from a highly experienced 3d printer owner that compared e3d to J-Heads. The J-Head printsby reifsnyderb - General
Hello, The J-Head Mk I through Mk III could be reconfigured by swapping the liner. The trade-off was that the melt chamber was ultra short and this resulted in higher extrusion temperatures and slower extrusion speeds. Later Mk IV J-Heads added a longer melt chamber with the trade-off being that the filament size could not be changed by swapping the liner. The end result was a much faster hotby reifsnyderb - General
Hello, The J-Head Mk 8 does not have the proper internal dimensions for printing 3mm. However, the J-Head Mk V-BV is capable of printing in 3mm. Both the liner and nozzle are different for 3mm and 1.75mm filaments. Best Regards, Brianby reifsnyderb - General
Hello, A small batch of J-Head Mk 8's are up for sale at J-Head Mk 8's are an improvement over previous J-Head hot-ends. In addition to being the best hot-end for printing PLA, they have an axial thermistor to make installation easier, the heat is supplied by a heater cartridge, and there are two internal seals so as to make leakage practically impossible. They are available in 1.75mm only dby reifsnyderb - General
Hello, Well, I am not entirely dead, yet. :-) I am still making J-Heads and selling them at However, sales are very low at the moment. I do have new, unreleased, versions of the J-Head. Best Regards, Brianby reifsnyderb - General
There were only ever two American companies producing J-heads and only one of them innovated new J-Head designs. Most J-Heads were (and now are) chinese made knock-offs that had incredible flaws. The chinese just took their flawed knock-offs and spammed them everywhere so as to bury the real thing. I am perfectly aware of the J-head temperature limits. New J-heads were developed that were gby reifsnyderb - General
This is exactly what happened to J-Head hot-ends. QuoteElmoC QuoteKDog I disagree. The Chinese E3D clones are obviously inferior quality and I've never heard anyone say otherwise. Folks are having nothing but problems with them. Doesn't take a rocket scientist to figure out they are not the same as the original. At the same time people are figuring out how to make them work because they don't haby reifsnyderb - General
This sounds like one of mutley's flex3drive systems....and you asking the community to pay for your injection molds?by reifsnyderb - Crowdfunding Projects Announcements
Hello, A real J-Head Mk V-BV comes with a type 5 (in Marlin) thermistor. Is your J-Head genuine? Best Regards, Brianby reifsnyderb - General
Was this with a genuine J-Head (5 rows of vents)? Quoteminhan Hello Thimo_98, Recently, I purchased myself a new genuine e3d v6 as well and I had the same problems as yours. Tried everything to solve it as you mentioned but none has helped. I was using the gray REAL filament that I used in my other printer with a jhead and I did not have any problems before. What solved my problem is switchinby reifsnyderb - General
How about replace it with a genuine J-Head from ? They don't jam unless the filament is bad.by reifsnyderb - General
QuoteJamesK ...snip... The E3D V6 is IMHO (and with apologies to Brian) the best hotend currently available to the DIY market, and it almost certainly took man-years of effort to develop. ...snip... Hello, I would have released better J-Head hot-ends and have designs and/or prototypes made. I just absolutely refuse to spend another dime designing another hot-end so china can profit from iby reifsnyderb - General
QuoteJata I will be begrudgingly ordering an authentic E3D V6 just because I don't want to have to mess with retooling it on my first build. But seriously, $80 USD for a small CNC'ed piece of aluminum, a few wires, and a fan.... If it were something more than a heatsink with a hole through it you could make the argument that design and engineering are a significant factor in the cost. And to sby reifsnyderb - General
Yes, the size of the heater block matters.by reifsnyderb - General
Hello, A genuine J-Head hot-end (made with PEEK, PTFE, and brass) is perfect for printing PLA. In some cases, a cooling fan isn't even required. It prints PLA fast, doesn't jam, and lasts for a long, long time. Aluminum can be used primarily for weight reduction. If 2024 or 7075 aluminum is used, it is not soft like the common 6061. However, 7075 is roughly as expensive as brass. Braby reifsnyderb - General
Hello, Actually, you don't need a machined heat sink with active cooling. Genuine J-Head hot-ends have been printing without active cooling for years. Best Regards, Brian QuotePawan Why do we need a machined heat sink with active cooling like the E3Dv6? Cant we have a ceramic hollow cylinder with a threaded end into the tapped heater bloc?by reifsnyderb - General
Hello, There are patents, trade marks, etc. Those are mostly a game for larger companies. The smaller company really doesn't have a legal department to handle this. The chinese have no problems violating trademarks, patents, etc. They know that it is very difficult to pursue them. I feel that the customer does have a responsibility to him or herself to educate themself and be sure of whatby reifsnyderb - General
Hello, You are correct. It is the customer who is ultimately responsible as they are purchasing and supporting this. The customer then pays even more when they get an inferior product that does not work correctly. Best Regards, Brian QuoteMKSA Quotegreenman100 Quotereifsnyderb This makes me wonder if the recent USPS increase in international shipping prices is to subsidize what USPS is paby reifsnyderb - General
Genuine J-Head hot-ends.by reifsnyderb - General
This makes me wonder if the recent USPS increase in international shipping prices is to subsidize what USPS is paying to ship china crap for free... Yes. This is annoying. It costs me a minimum of 2.54 USD to send something other than a letter in the US. You can buy connectors out of China for 80 cents free shipping. They need to correct this imbalance. I am for free trade, but this is the USby reifsnyderb - General
Yes, shipping is another issue. Shipping costs from the USA to anywhere outside the USA just jumped considerably. The current costs are roughly: A small package to Canada: $9.50 A small package to anywhere else: $13.50 (There is no tracking for either and they arrive when they arrive. It is usually 2 to 3 weeks.) Express Mail is now almost $60 to anywhere outside the USA. There is trackby reifsnyderb - General
Hello, I completely agree with this assessment. From my experience, most people have their priorities as follows even when buying a hot-end: 1. Price 2. Price 3. Price 4. Does it really work? 5. Quality 6. Support Designing, testing, manufacturing, and distributing a product that works every time, is of high quality, and supporting it has a cost. The majority is not willing to pay forby reifsnyderb - General