Hello, I have opened hotends.com at http://www.hotends.com as a web site specializing in the sale of hot-ends made by my company, Reifsnyder Precision Works. The first hot-ends for sale are J-Head hot-ends and related parts. I have been active in the Open Source community since 1998 and started providing hot-ends for the RepRap community in 2009. In 1998, I started developing software for the FreeDOS project and contributed several disk utilities, including the Free FDISK disk partitioning program. Later on, around 2006, I contributed an open-source php-based document management system for the Xoops portal. This document management system is still in use and currently houses almost 250,000 documents. As in the open-source software field, I am committed to ensuring that the "source code" is still available by ensuring that the blueprints and instructions, for my products, are available. At the moment, all of the J-Head nozzle and hot-end information is posted at http://www.reprap.org/wiki/J_Head_Nozzle. As I develop and/or improve my product line I will continue to make this information available. In addition to posting the blueprints and instructions, I also maintain a blog at http://jheadnozzle.blogspot.com/. In this blog I have development news regarding the J-Head nozzle and hot-end. Thank you for your support, Brian Reifsnyder President, Reifsnyder Precision Works https://reprap.org/forum/read.php?94,101612,101612#msg-101612 Tue, 13 Oct 2026 17:30:04 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?94,101612,131940#msg-131940 https://reprap.org/forum/read.php?94,101612,131940#msg-131940 reifsnyderb For Sale Tue, 08 May 2012 19:10:37 -0400 https://reprap.org/forum/read.php?94,101612,127543#msg-127543 https://reprap.org/forum/read.php?94,101612,127543#msg-127543 reifsnyderb For Sale Fri, 06 Apr 2012 00:37:49 -0400 https://reprap.org/forum/read.php?94,101612,125151#msg-125151 https://reprap.org/forum/read.php?94,101612,125151#msg-125151 reifsnyderb For Sale Wed, 21 Mar 2012 10:20:13 -0400 https://reprap.org/forum/read.php?94,101612,123753#msg-123753 https://reprap.org/forum/read.php?94,101612,123753#msg-123753 nophead For Sale Mon, 12 Mar 2012 13:18:54 -0400 https://reprap.org/forum/read.php?94,101612,123737#msg-123737 https://reprap.org/forum/read.php?94,101612,123737#msg-123737
Miguel Angel]]> MA_BLACK For Sale Mon, 12 Mar 2012 11:18:11 -0400 https://reprap.org/forum/read.php?94,101612,123692#msg-123692 https://reprap.org/forum/read.php?94,101612,123692#msg-123692
I think I will order one.....

Cheers]]> jez_a For Sale Mon, 12 Mar 2012 08:03:00 -0400 https://reprap.org/forum/read.php?94,101612,123688#msg-123688 https://reprap.org/forum/read.php?94,101612,123688#msg-123688 nophead For Sale Mon, 12 Mar 2012 07:52:00 -0400 https://reprap.org/forum/read.php?94,101612,123675#msg-123675 https://reprap.org/forum/read.php?94,101612,123675#msg-123675
Can anyone advise as to whether the J-Head Mk IV-B will fit as a replacement for a V5 Hotend in a Wades extruder?

The V5 extruder I was using suffered a large leak of molten PLA, which jammed up the brass barrel, the brass heat block and when I tried to remove it the PTFE barrel sheared where the brass barrel meets the PTFE. I need a replacement and from the above comments the Mk IV-B seems like the way to go, but I need to ensure it will mate with the Wades extruder in the 16mm cavity where the PTFE Barrel was?

Any information would be greatly appreciated.

Cheers
Jez]]> jez_a For Sale Mon, 12 Mar 2012 07:09:21 -0400 https://reprap.org/forum/read.php?94,101612,122062#msg-122062 https://reprap.org/forum/read.php?94,101612,122062#msg-122062
I was worried about building my own hotend or getting some high-maintenance design, but the J-Head has really put all that to rest. No problems here!

Thanks, Brian!

Phil]]> phord For Sale Sat, 03 Mar 2012 11:11:02 -0500 https://reprap.org/forum/read.php?94,101612,121588#msg-121588 https://reprap.org/forum/read.php?94,101612,121588#msg-121588 3 children almost done and a bunch of wades completed and shipped plus some toys done
not doing PLA at this time but not worried if i do. changing color with out drama ..
i will be selling another hot end and if it works as well it will be something .
high marks for this hot end a bench mark for others .]]> spad007 For Sale Wed, 29 Feb 2012 14:11:16 -0500 https://reprap.org/forum/read.php?94,101612,120487#msg-120487 https://reprap.org/forum/read.php?94,101612,120487#msg-120487 Thav For Sale Thu, 23 Feb 2012 12:29:05 -0500 https://reprap.org/forum/read.php?94,101612,120074#msg-120074 https://reprap.org/forum/read.php?94,101612,120074#msg-120074
Thanks Brian for producing the beautiful product.. Next up will be testing the 0.35 tip on 3mm , as soon as I get it in the mail!!]]> mhensen For Sale Tue, 21 Feb 2012 10:44:30 -0500 https://reprap.org/forum/read.php?94,101612,119375#msg-119375 https://reprap.org/forum/read.php?94,101612,119375#msg-119375
1.75mm conversions are back in stock.

Regards,

Brian]]> reifsnyderb For Sale Fri, 17 Feb 2012 16:47:24 -0500 https://reprap.org/forum/read.php?94,101612,118019#msg-118019 https://reprap.org/forum/read.php?94,101612,118019#msg-118019
I'll have the 1.75mm converted hot-ends back in stock next week.

Regards,

Brian]]> reifsnyderb For Sale Thu, 09 Feb 2012 19:55:44 -0500 https://reprap.org/forum/read.php?94,101612,117615#msg-117615 https://reprap.org/forum/read.php?94,101612,117615#msg-117615
I am going to start putting inventory out on the [www.hotends.com] web shop as I am getting caught up with my bulk orders. At the present time, I am going to put a small quantity of hot-ends up for sale daily.

I am sorry about the situation; but, I want to ensure that I am able to ship your parts in under two business days of placing your order.

Regards,

Brian]]> reifsnyderb For Sale Tue, 07 Feb 2012 10:22:32 -0500 https://reprap.org/forum/read.php?94,101612,115639#msg-115639 https://reprap.org/forum/read.php?94,101612,115639#msg-115639
The J-Head Mk III-B was the first model that would easily extrude PLA without jamming. The heat-sink carries the heat away and cools the core. It is fairly difficult to machine as the internal holes need to line up pretty closely or else the liner cannot be installed.

The J-Head Mk IV-B was designed as a cheaper way to build a hot-end in a way that it would not jam easily if PLA were being extruded. The difficulty, with the Mk IV-B is that the vents are very tedious to make by hand and I couldn't easily make them when the Mk III-B was first tested. However, once I CNC'd a small milling machine, it because both feasible and practical to make the Mk IV.

The "B", in both models, designates that the nozzle is brass as the original design used an aluminum nozzle.

I expect to have more stock in in the next two weeks.

Regards,

Brian


zhilianz Wrote:
-------------------------------------------------------
> Hi Brian,
>
> Could you explain what is the difference btw
> J-Head Mk III-B and J-Head Mk IV-B?
> Currently it is out of stock, when back to stock?
>
> Thanks,
> ZZ]]> reifsnyderb For Sale Wed, 25 Jan 2012 17:56:07 -0500 https://reprap.org/forum/read.php?94,101612,115516#msg-115516 https://reprap.org/forum/read.php?94,101612,115516#msg-115516
Could you explain what is the difference btw J-Head Mk III-B and J-Head Mk IV-B?
Currently it is out of stock, when back to stock?

Thanks,
ZZ]]> zhilianz For Sale Wed, 25 Jan 2012 00:55:33 -0500 https://reprap.org/forum/read.php?94,101612,113972#msg-113972 https://reprap.org/forum/read.php?94,101612,113972#msg-113972
The resistor leads will get pretty hot and it is a good idea to join the resistor leads to the wire with bootlace ferrules or something similar. I have also seen where people connected the resistor leads with a set of tiny alligator clips.

The thermistor leads are pretty long but it won't hurt to use bootlace ferrules there as well.

Regards,

Brian


ggal625 Wrote:
-------------------------------------------------------
> Brian,
>
> I see that you recommend high temperature wire for
> the resistor. How long do these wires have to be
> before the temps have cooled off to a reasonable
> level? In other words, can I just get by with a
> short segment of high temp wire soldered to
> standard insulation wire?
>
> Do I need to use any kind of special wire to
> connect the thermistor, or does it come with long
> leads already?
>
> Thanks,
>
> Greg]]> reifsnyderb For Sale Sun, 15 Jan 2012 00:34:59 -0500 https://reprap.org/forum/read.php?94,101612,113913#msg-113913 https://reprap.org/forum/read.php?94,101612,113913#msg-113913
I see that you recommend high temperature wire for the resistor. How long do these wires have to be before the temps have cooled off to a reasonable level? In other words, can I just get by with a short segment of high temp wire soldered to standard insulation wire?

Do I need to use any kind of special wire to connect the thermistor, or does it come with long leads already?

Thanks,

Greg]]> ggal625 For Sale Sat, 14 Jan 2012 14:58:25 -0500 https://reprap.org/forum/read.php?94,101612,111439#msg-111439 https://reprap.org/forum/read.php?94,101612,111439#msg-111439 . i jammed it with too fat ABS filament. I dissembled it cleaned it out with acetone re assembled it
and its ready to print again i used 2 1/2 inch wrenches no problem .
this is a very sturdy hot end well made it's just the Doofus running it.
the price is fair .a good buy.and i did not have to wind wire and glob on cement to maker it
oh and i ran mine at 242c for a few prints (one for 90 min) with out melting any thing.]]> spad007 For Sale Wed, 28 Dec 2011 14:22:12 -0500 https://reprap.org/forum/read.php?94,101612,109386#msg-109386 https://reprap.org/forum/read.php?94,101612,109386#msg-109386 reifsnyderb For Sale Thu, 08 Dec 2011 23:03:42 -0500 https://reprap.org/forum/read.php?94,101612,106308#msg-106308 https://reprap.org/forum/read.php?94,101612,106308#msg-106308
Update: I checked the error logs and something happened around 12:30 this morning.

nterius Wrote:
-------------------------------------------------------
> Hey, is there any particular reason why your site
> is down?]]> reifsnyderb For Sale Tue, 15 Nov 2011 14:34:55 -0500 https://reprap.org/forum/read.php?94,101612,106259#msg-106259 https://reprap.org/forum/read.php?94,101612,106259#msg-106259 Interius For Sale Tue, 15 Nov 2011 05:19:50 -0500 https://reprap.org/forum/read.php?94,101612,105306#msg-105306 https://reprap.org/forum/read.php?94,101612,105306#msg-105306
Interius Wrote:
-------------------------------------------------------
> Do you guys give bulk discounts? Say 20-40. PM me
> please. :)]]> reifsnyderb For Sale Tue, 08 Nov 2011 21:17:48 -0500 https://reprap.org/forum/read.php?94,101612,105291#msg-105291 https://reprap.org/forum/read.php?94,101612,105291#msg-105291 Interius For Sale Tue, 08 Nov 2011 18:47:34 -0500 https://reprap.org/forum/read.php?94,101612,104496#msg-104496 https://reprap.org/forum/read.php?94,101612,104496#msg-104496

I am located about 20 north of Harrisburg, PA.



Regards,



Brian]]> reifsnyderb For Sale Wed, 02 Nov 2011 20:14:38 -0400 https://reprap.org/forum/read.php?94,101612,104463#msg-104463 https://reprap.org/forum/read.php?94,101612,104463#msg-104463

Roy]]> roygpa For Sale Wed, 02 Nov 2011 13:03:27 -0400 https://reprap.org/forum/read.php?94,101612,103644#msg-103644 https://reprap.org/forum/read.php?94,101612,103644#msg-103644 reifsnyderb For Sale Thu, 27 Oct 2011 12:36:42 -0400 https://reprap.org/forum/read.php?94,101612,103061#msg-103061 https://reprap.org/forum/read.php?94,101612,103061#msg-103061
thekendall Wrote:
-------------------------------------------------------
> Do you guys offer any sort of educational
> discount?]]> reifsnyderb For Sale Tue, 25 Oct 2011 09:34:42 -0400 https://reprap.org/forum/read.php?94,101612,103011#msg-103011 https://reprap.org/forum/read.php?94,101612,103011#msg-103011 thekendall For Sale Tue, 25 Oct 2011 03:24:47 -0400