# Snapmaker U1 High Flow Hotend Beta Testers Calls **URL:** \ **Category:** News and Announcements\ **Created:** [July 29, 2026, 7:40am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699 "2026-07-29T07:40:05Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![wlodeka](https://avatars.discourse-cdn.com/v4/letter/w/e68b1a/32.png) [@wlodeka](https://forum.snapmaker.com/u/wlodeka)\ **Post date:** [July 29, 2026, 3:15pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/41 "2026-07-29T15:15:57Z")
I forgot to write that I am already testing firmware 1.6.0 ![PXL_20260729_133024925.jpg](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/c/2/c2160c47c79d11c8f8cff8ed476c152b4266df7f.jpeg) ---
**Author:** ![Boz91](https://avatars.discourse-cdn.com/v4/letter/b/e99b99/32.png) [@Boz91](https://forum.snapmaker.com/u/Boz91)\ **Post date:** [July 29, 2026, 3:21pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/42 "2026-07-29T15:21:59Z")
Hi Zoe, Thank you for letting me know about this opportunity. I am very interested in testing the new 0.4 mm high-flow hotends for the Snapmaker U1. I would be available to test them in real-world production scenarios throughout the entire testing period. **1. What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** I regularly print with standard PLA, high-speed PLA, PETG, ABS, HIPS, TPU 95A, PVA, and PVB. With a 0.4 mm nozzle, the volumetric flow rates I typically use are approximately: - Standard PLA: 16 mm³/s - High-speed PLA: 18–20 mm³/s - PETG: 12 mm³/s - ABS: 7 mm³/s - HIPS: 8 mm³/s - TPU 95A: 3–4 mm³/s - PVA: 4–6 mm³/s - PVB: 12–15 mm³/s **2. Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** Yes. I have removed and reinstalled U1 hotends several times, both when installing hotends with different nozzle diameters and when troubleshooting or clearing filament clogs. **3. Have you used other high-flow hotends? (e.g., CHT 0.6 mm brass)** Yes. I have used a Bondtech CHT 0.6 mm Coated Brass Nozzle and have had very good results with it, including consistent extrusion, good print quality, and reliable layer adhesion. I would be happy to document the test results, share my experience, and provide detailed feedback. Thank you for the opportunity! Best regards, Alberto ---
**Author:** ![rnewquist](https://avatars.discourse-cdn.com/v4/letter/r/f05b48/32.png) [@rnewquist](https://forum.snapmaker.com/u/rnewquist)\ **Post date:** [July 29, 2026, 3:48pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/43 "2026-07-29T15:48:59Z")
1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** I use PETG-CF for my daily printing. But I also print a lot with TPU (65a-90a) and PVA for supports. Generally I print the TPU’s slower at 3.2. 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** 1. Yes. I have replaced mutliple nozzles and have replaced one nozzle with a plated tungsten carbide. 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass) Yes, my previous printer I had high flow nozzles and I currently have one installed on the U1.** ---
**Author:** ![CSOOPY35](https://avatars.discourse-cdn.com/v4/letter/c/3be4f8/32.png) [@CSOOPY35](https://forum.snapmaker.com/u/CSOOPY35)\ **Post date:** [July 29, 2026, 4:40pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/44 "2026-07-29T16:40:52Z")
**If you’re interested, please answer the following 3 questions in the comments:** 1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** 1. This is something i have mess with so much, would be so exciting, I have used TPU, ASA, PLA, PETG, ABS. I have been able to push many of these between 10 and 25mm3/s. 1. ABS - 20 2. PLA - 25 3. PETG - 21 4. TPU - 10 -17 (depending on how lucky i am with brands) 5. ASA: 23 - 26 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** 1. On other brands I have done this specifically more. With the snapmaker I have pull the hotends out messaed with them but not fuly dissabled the hotend itself? 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass)** 1. I have used other brands on different printers not on the U1 yet …IT WOULD BE NO NICE to speed up prints. > ---
**Author:** ![ccleveland](https://avatars.discourse-cdn.com/v4/letter/c/f04885/32.png) [@ccleveland](https://forum.snapmaker.com/u/ccleveland)\ **Post date:** [July 29, 2026, 4:43pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/45 "2026-07-29T16:43:24Z")
> **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** PLA+HS, Polymaker PLA, PETG, ASA, PC/PC-CF, PA-CF, HIPS depending on application but primary go-tos are VoxelPLA+HS and Polymaker ASA. 12 mm^3-30mm^3 depending on material, nozzle, and machine. > **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** Have assembled, rebuilt, and tuned Artillery, Voron, and fully self-sourced 3d printers\ > **Have you used other high flow hotends? (e.g., CHT 0.6mm brass)** Yes, Revo HF is my go to but have also used Volcano CHT, and Super Volcano > For users currently running the paxx extended firmware, please confirm your willingness to install the official 1.6.0 beta firmware when available. Yes, using paxx for the lower stepper temperature and a few fixes I’m waiting for mainline firmware to include but I’m totally familiar with building and upgrading firmware and not concerned with the publisher of firmware beyond security concerns. ---
**Author:** ![Cheeky\_b52](https://avatars.discourse-cdn.com/v4/letter/c/e47774/32.png) [@Cheeky\_b52](https://forum.snapmaker.com/u/Cheeky_b52)\ **Post date:** [July 29, 2026, 4:49pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/46 "2026-07-29T16:49:01Z")
As the u1 benchy record holder for months now, making my own x1c highflow conversion mod, and a preproduction pika hotend tester. I would love to test these new hotends out. 1. i use pla/petg/petg-cf/abs/abs-cf/asa/nylon. With the pika and cht nozzles, I’ve printed upwards of 90mm3 flow. Typical flow rates i use for 0.4 is 35-40mm3, 0.6/0.8cht 35-60mm3 2. I’ve gone to extremes with tuning including custom hotends and heater swaps 3. yes pika with various nozzles, and my custom x1c Microswiss hotend with cht flowtech nozzles ---
**Author:** ![jiyang1018](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/jiyang1018/32/34484_2.png) [@jiyang1018](https://forum.snapmaker.com/u/jiyang1018)\ **Post date:** [July 29, 2026, 5:54pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/47 "2026-07-29T17:54:08Z")
1. PLA and variants, PETG, TPU, TPE. Will print PA, ABS, ASA and the fiber infused ones after I receive the top cover. I use preset speed. 2. Yes. 3. No. I bought extra tool heads to swap instead of nozzles. ![IMG_8723](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/d/a/da0e59fd5cb3225588457c081567c59009284428.jpeg) ---
**Author:** ![Eastsideprints](https://avatars.discourse-cdn.com/v4/letter/e/53a042/32.png) [@Eastsideprints](https://forum.snapmaker.com/u/Eastsideprints)\ **Post date:** [July 29, 2026, 6:18pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/48 "2026-07-29T18:18:42Z")
Mostly Petg-hf around 15-22mms and Snapmaker snap speed 22-25mms Just bought a full set of .2 mm hot ends to try out so yes I have had experience changing out hot ends and fixed several issues with some minor clogs no experience with high flow hot ends but would like to try some I mostly do custom containers for collectible coins and lots of prototypes ---
**Author:** ![Moose106](https://avatars.discourse-cdn.com/v4/letter/m/f6c823/32.png) [@Moose106](https://forum.snapmaker.com/u/Moose106)\ **Post date:** [July 29, 2026, 6:35pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/49 "2026-07-29T18:35:43Z")
Hello! I would love to be a beta tester for the high flow nozzles! 1. I have used Snapmaker, Voxel, Elegoo, Polymaker and Overture brand filaments in PLA, PLA-CF, PETG and PETG-GF, TPU and PET-GF. I calibrate each filament and save a profile with modified flow rate, retraction and temperature. I get about 22 cubic mm flow from the Voxel PLA and Overture PETG after calibration. Higher flow rates produced 2. I have already purchased the hardened steel 0.4mm hotends from Snapmaker and installed them in my machine. I have the Stainless steel originals as backups. 3. I have an Elegoo Centauri Carbon in which I have installed a Microswiss Flowtech hotend. I have 0.4, 0.6 and 0.8mm high-flow hardened nozzles and I love the results it provides. I calibrated each filament for the flowtech nozzles and saw an improvement in flow from 25 to 45% depending on the filament type used. I heard rumors Microswiss was making a hotend for the U1. Is this a collaboration? That would be awesome. Thank you! ---
**Author:** ![laryllan](https://avatars.discourse-cdn.com/v4/letter/l/f05b48/32.png) [@laryllan](https://forum.snapmaker.com/u/laryllan)\ **Post date:** [July 29, 2026, 8:36pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/50 "2026-07-29T20:36:44Z")
1. **Which filaments do you use, and what is your typical volumetric flow rate (mm³/s)? Polymaker Panchroma Matte PLA 20 mm³/s Polymaker Luminous PLA 15 mm³/s Polymaker Starlight PLA 15 mm³/s Overture “high speed” TPU 3.2 mm³/s 😉 Polylight PETG 7.5 mm³/s Recyclingfabrik rPLA 12 mm³/s Recyclingfabrik rPETG 12 mm³/s …** 2. **Have you ever disassembled, installed, or adjusted your printer’s hotend module? No.** 3. **Have you used other high-flow hotends before? (e.g., CHT 0.6 mm brass) No.** What exactly defines a high-flow hotend? ---
**Author:** ![bordator](https://avatars.discourse-cdn.com/v4/letter/b/77aa72/32.png) [@bordator](https://forum.snapmaker.com/u/bordator)\ **Post date:** [July 29, 2026, 9:20pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/51 "2026-07-29T21:20:40Z")
1. PLA(Snapspeed, sunlu HS, Prusa), PETG(sunlu normal/HS), TPU Flowrate Range is from 8-27 depending on the filament and calibrated for each of them 2. yes to the 0.2 Hotend 3. no So far I use the snapmaker Firmware. Best regards Frank ---
**Author:** ![thechickenmoo](https://avatars.discourse-cdn.com/v4/letter/t/e56c9b/32.png) [@thechickenmoo](https://forum.snapmaker.com/u/thechickenmoo)\ **Post date:** [July 29, 2026, 10:32pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/52 "2026-07-29T22:32:18Z")
1. Primarily PLA and PETG, but I’ve also used some TPU (95A) and some PA6-GF for a few projects. On the U1, I’ve mostly gone with whatever the default for the profile, so somewhere between 12 and 20. On my Prusa MK4s, I mostly stick with 20. 2. Yes, I’ve changed from the original .4 heads to .6 hardended steel, and then down to .4 hardened steel, so far. I also built my MK4S w/ MMU3 previously, as well as some upgrades to an older creality Ender 3 Pro. 3. Not on this machine. I did use a HF Nozzle with the Prusa MK4S for a while. I’ve been pondering the paxx firmware for some of the NFC tag options, but haven’t made the leap yet. I don’t mind sticking with the official firmware (even in a beta format). ---
**Author:** ![Cainmos](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@Cainmos](https://forum.snapmaker.com/u/Cainmos)\ **Post date:** [July 29, 2026, 10:47pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/53 "2026-07-29T22:47:03Z")
> [@Zoe\_M](#): > > 1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** > 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** > 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass)** I’m interested in beta testing. Would be happy to run calibration tests between standard and high flow nozzles and some test builds to provide feedback. 1. PLA/PLA+, PETG, TPU. Calibrated volumetric ranges from 6-1mm³/s. 2. I have disassembled and installed hotend assemblies. 3. I have not used other high flow hotends. 4. I can upgrade to the beta 1.6.0 firmware. ---
**Author:** ![Jle2199](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/jle2199/32/31254_2.png) [@Jle2199](https://forum.snapmaker.com/u/Jle2199)\ **Post date:** [July 29, 2026, 11:27pm UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/54 "2026-07-29T23:27:16Z")
1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass)** ---
**Author:** ![rathpc](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/rathpc/32/33255_2.png) [@rathpc](https://forum.snapmaker.com/u/rathpc)\ **Post date:** [July 30, 2026, 2:13am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/55 "2026-07-30T02:13:46Z")
1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** PLA, SnapSpeed PLA, PETG, High Speed PETG, 98A TPU, Tough PC, ABS, PC-CF and flow rates from 3.2 all the way up to 23 mm/s. 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** I have removed SS hotends to swap with HS hotends and it was pretty easy. 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass)** I have used 0.6 and 0.8 HS hotends on my U1 ---
**Author:** ![BarkingCauldron](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/barkingcauldron/32/34480_2.png) [@BarkingCauldron](https://forum.snapmaker.com/u/BarkingCauldron)\ **Post date:** [July 30, 2026, 2:45am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/56 "2026-07-30T02:45:23Z")
I print mainly with PLA and PETG, I have done some TPU printing I have disassembled the hot end on my A1, A1 Mini and Flashforge AD5M I don’t believe I have used High Flow hot ends. Thank you! Sharon M. Perez Barking Cauldron Creations ---
**Author:** ![simplegamerz948](https://avatars.discourse-cdn.com/v4/letter/s/9e8a1a/32.png) [@simplegamerz948](https://forum.snapmaker.com/u/simplegamerz948)\ **Post date:** [July 30, 2026, 3:41am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/57 "2026-07-30T03:41:23Z")
> [@Zoe\_M](#): > > 1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** > 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** > 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass)** I use Sunlu Pla (around 20mm^3/s), Sunlu easy PA (13.75mm^3/s), Jessie Premium PLA (about 20mm^3/s), Overture TPU (3.2mm^3/s), Overture marble PLA (8mm^3/s), Ataraxia Art FPLA+ (3.2mm^3/s). Yes I’ve built and rebuilt many hotends from many different brands like a lot of Ender 3’s, a few vorons, a K1, an A1, and on my U1 when I was looking at how hard it was (it’s not too bad just getting the cables in the right place takes a bit of work). Yes I also tune all my filaments for flow rate, pressure advance, temperature, retraction, cooling fan speed, and support settings. Yes I’ve used several but I’ve always used 0.4. I have one on my K1, two of my vorons (0.2 and 2.4), on a Goliath hotend that’s floated between printers and on my old Ender 3. ---
**Author:** ![Lostone54](https://avatars.discourse-cdn.com/v4/letter/l/b38774/32.png) [@Lostone54](https://forum.snapmaker.com/u/Lostone54)\ **Post date:** [July 30, 2026, 4:09am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/58 "2026-07-30T04:09:31Z")
1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)?** I currenly am mostly printing ABS and Hips with 0.4 and 0.5 nozzles I have pushed the printer to between 18-20mm^3/s with the stock hotend. 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer?** I just installed 2x 0.5mm nozzle hardened nozzle with Pika hotends and have pushed the machine to 25mm^3/s and hopfully higher soon 3. **Have you used other high flow hotends? (e.g., CHT 0.6mm brass) I have use both Microswiss and Bondtech CHT nozzle of various sizes on other machines from 0.4-1mm in both hardened and stadard brass. If possible it would be **awesome** to see 0.5mm Nozzle support too, for more support for CF/GF filaments.** ---
**Author:** ![Joel\_Finn](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/joel_finn/32/33591_2.png) [@Joel\_Finn](https://forum.snapmaker.com/u/Joel_Finn)\ **Post date:** [July 30, 2026, 4:26am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/59 "2026-07-30T04:26:06Z")
1. **What filaments do you use, and what is your usual volumetric flow rate (mm³/s)? PLA: 15-20 mm³/s (Average between brands) PETG: 25 mm³/s (Polymaker’s new formula PETG. Others usually 15 mm³/s) TPU: 4-10 mm³/s (Depends on the type and brand of TPU)** 2. **Have you ever disassembled, installed, or tuned the hotend assembly on your printer? Yes** 3. \*\*Have you used other high flow hotends? (e.g., CHT 0.6mm brass) Yes, I have used high flow hotends on several prints, but not yet on the U1. ---
**Author:** ![Uniqueacid](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/uniqueacid/32/33593_2.png) [@Uniqueacid](https://forum.snapmaker.com/u/Uniqueacid)\ **Post date:** [July 30, 2026, 4:52am UTC](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699/60 "2026-07-30T04:52:17Z")
What filaments do you use, and what is your usual volumetric flow rate (mm³/s)? U1 Specifically: - PLA 12-20 mm³/s - SILK PLA 6.7-10.2 mm³/s - HS PLA+ 15-22 mm³/s - PETG 11-13 mm³/s - HS PETG 16-22 mm³/s - 95A TPU 7-9 mm³/s - HF 95A TPU 9-11 mm³/s _Awaiting official on order tophat for ABS/ASA/PC/PA testing, have BIQU Popcap if higher temp testing is needed. I have ~350KG of filament in house from PLA to PPS-GF._ Have you ever disassembled, installed, or tuned the hotend assembly on your printer? - Swapped the hotends from SS to HSN on my U1. - Have extra complete toolheads for both Left and Right in my maintenance stock. - Swapping hotends, modding hotends, and PID tuning is common occurrence on all my printers. Have you used other high flow hotends? - I use HF nozzles on most of my other printers, including H2C, X1C, CC1, SK1, and FLSUN T1 Pro and S1 Pro. - Across all my printers, HF ranges between 35 and 70 mm³/s. [Previous page](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699.md?page=2) [Next page](https://forum.snapmaker.com/t/snapmaker-u1-high-flow-hotend-beta-testers-calls/42699.md?page=4)