Heatsinkless hotend

Heatsinkless hotend [attachment 70397 IMG308.jpg][attachment 70398 P1460486_.jpg][attachment 70399 P1460487_.jpg] I always wonder why nobody use stratasys-like hotends. They are without heatsink. So this is my one. Simple, fast and effective. 400-500mm/min into air extruding ABS and PLA. It virtually cannot be jammed. Thе barrel ( from old chineese hotend) is with PTFE tube inside. The tube can be inserted only from downside. https://reprap.org/forum/read.php?1,613257,613257#msg-613257 Wed, 11 Mar 2026 20:55:23 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,613257,616410#msg-616410 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,616410#msg-616410

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karabas

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reifsnyderb
J-Heads don't have heat-sinks. Genuine J-Heads don't need heat-sinks.
PEEK part is about it.

]]> reifsnyderb General Wed, 27 Jan 2016 08:37:38 -0500 https://reprap.org/forum/read.php?1,613257,616370#msg-616370 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,616370#msg-616370

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epicepee
I run my E3D-v6 at about 130 mm/sec, and could probably run it faster with a good extruder.

PLA or ABS? what extruder? what temperature?
I am on direct drive now with D10mm drive wheel(gear)]]> karabas General Wed, 27 Jan 2016 06:38:36 -0500 https://reprap.org/forum/read.php?1,613257,614696#msg-614696 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614696#msg-614696

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karabas

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thejollygrimreaper
yeah ... not exactly a speed daemon, 500mm/min only equates to 8.3mm/sec which in printing terms isn't exactly what i would call fast personally i'm running between 60mm/sec and 90mm/sec and others run a lot faster

the only reason that hotend "works" is simply down to the ptfe tubing inside the stainless tube and you'll be getting a huge meltzone so i wouldn't expect retraction to be very helpfull

Agree.
But stratasys(dimention) melting zone as twice as longer and retract works.

I want to try their nozzles.

BTW what hotends do you speed up to 60-90mm/sec?

mine, see the link the signature]]> thejollygrimreaper General Sun, 24 Jan 2016 01:30:34 -0500 https://reprap.org/forum/read.php?1,613257,614652#msg-614652 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614652#msg-614652 epicepee General Sat, 23 Jan 2016 21:43:37 -0500 https://reprap.org/forum/read.php?1,613257,614531#msg-614531 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614531#msg-614531

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thejollygrimreaper
yeah ... not exactly a speed daemon, 500mm/min only equates to 8.3mm/sec which in printing terms isn't exactly what i would call fast personally i'm running between 60mm/sec and 90mm/sec and others run a lot faster

the only reason that hotend "works" is simply down to the ptfe tubing inside the stainless tube and you'll be getting a huge meltzone so i wouldn't expect retraction to be very helpfull

Agree.
But stratasys(dimention) melting zone as twice as longer and retract works.

I want to try their nozzles.

BTW what hotends do you speed up to 60-90mm/sec?]]> karabas General Sat, 23 Jan 2016 15:31:29 -0500 https://reprap.org/forum/read.php?1,613257,614527#msg-614527 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614527#msg-614527

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Frans@France
What would be the benefit of a hotend without heatsink?

Size (vertical) and simplicity.Unexpensive.
F.e. for deltas such as Atom-2 it does matter.]]> karabas General Sat, 23 Jan 2016 15:20:09 -0500 https://reprap.org/forum/read.php?1,613257,614525#msg-614525 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614525#msg-614525

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reifsnyderb
J-Heads don't have heat-sinks. Genuine J-Heads don't need heat-sinks.

PEEK part is about it.]]> karabas General Sat, 23 Jan 2016 15:18:35 -0500 https://reprap.org/forum/read.php?1,613257,614524#msg-614524 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614524#msg-614524

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Floyd
The blower is cooling the threads of the insert just like a tiny heatsink.

Agree.]]> karabas General Sat, 23 Jan 2016 15:17:46 -0500 https://reprap.org/forum/read.php?1,613257,614508#msg-614508 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614508#msg-614508
the only reason that hotend "works" is simply down to the ptfe tubing inside the stainless tube and you'll be getting a huge meltzone so i wouldn't expect retraction to be very helpfull]]> thejollygrimreaper General Sat, 23 Jan 2016 14:30:43 -0500 https://reprap.org/forum/read.php?1,613257,614448#msg-614448 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,614448#msg-614448 Frans@France General Sat, 23 Jan 2016 12:19:03 -0500 https://reprap.org/forum/read.php?1,613257,613931#msg-613931 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613931#msg-613931 Floyd General Fri, 22 Jan 2016 10:08:17 -0500 https://reprap.org/forum/read.php?1,613257,613919#msg-613919 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613919#msg-613919 reifsnyderb General Fri, 22 Jan 2016 09:59:54 -0500 https://reprap.org/forum/read.php?1,613257,613778#msg-613778 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613778#msg-613778

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Floyd
Did no one else notice the huge blower pointed at the threaded part of the hot end?
I dont like how its mounted. The heater cartridge is right near the mounting point soaking heat into the printer and the nozzle. Not really the best idea but if it works then good job.

Blower is important.
You mean blower cools heater cartridge? Or transferes heat to unwanted places?]]> karabas General Fri, 22 Jan 2016 04:33:15 -0500 https://reprap.org/forum/read.php?1,613257,613336#msg-613336 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613336#msg-613336 I dont like how its mounted. The heater cartridge is right near the mounting point soaking heat into the printer and the nozzle. Not really the best idea but if it works then good job.]]> Floyd General Thu, 21 Jan 2016 08:27:00 -0500 https://reprap.org/forum/read.php?1,613257,613288#msg-613288 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613288#msg-613288

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the_digital_dentist
The QUBD extruders are similar, and so are the extruders on the old Makerbots.

Cannot be jammed? Hmmmm. As I recall, the QUBD and the Makerbot extruders were jammed most of the time.

Disagree, they are not ever similar. Massive solid heatsink. Long nonheated part of barrel.

Keypoint of my design is short nonheated upper part of barrel. Possible jamming zone is about 2mm or less. Yes this zone can be considered as a rudimentary heatsink :))
Barrel is made of steel. Brass didnot work for me. And I made nozzle shorter.

The disadvantages of the above are:
1 noncompatibility with Jhead/e3d type of mounting.
2 loading of filament requires funnel on the top of barrel for easy loading.]]> karabas General Thu, 21 Jan 2016 06:38:49 -0500 https://reprap.org/forum/read.php?1,613257,613285#msg-613285 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613285#msg-613285 Srek General Thu, 21 Jan 2016 06:29:58 -0500 https://reprap.org/forum/read.php?1,613257,613281#msg-613281 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613281#msg-613281

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jinx
but where it's bolted to the frame doesn't that make rudimentary heatsink?.

???
Heated block is bolted not barrel.]]> karabas General Thu, 21 Jan 2016 06:04:24 -0500 https://reprap.org/forum/read.php?1,613257,613273#msg-613273 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613273#msg-613273
Cannot be jammed? Hmmmm. As I recall, the QUBD and the Makerbot extruders were jammed most of the time.]]> the_digital_dentist General Thu, 21 Jan 2016 05:42:57 -0500 https://reprap.org/forum/read.php?1,613257,613263#msg-613263 Re: Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613263#msg-613263
but where it's bolted to the frame doesn't that make rudimentary heatsink?. but at 400-500 mm/s aint much time for the fila to swell and getting 400-500 mm/s out of a reprap extruder be a feat in itself.]]> jinx General Thu, 21 Jan 2016 05:25:30 -0500 https://reprap.org/forum/read.php?1,613257,613257#msg-613257 Heatsinkless hotend https://reprap.org/forum/read.php?1,613257,613257#msg-613257
I always wonder why nobody use stratasys-like hotends. They are without heatsink.
So this is my one. Simple, fast and effective.
400-500mm/min into air extruding ABS and PLA. It virtually cannot be jammed.
Thе barrel ( from old chineese hotend) is with PTFE tube inside. The tube can be inserted only from downside.]]> karabas General Thu, 21 Jan 2016 05:10:03 -0500