by HLMAX, published

T MAX by HLMAX Aug 20, 2012
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T MAX by HLMAX is licensed under the Creative Commons - Attribution - Share Alike license.

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The T MAX is a derivative of the MendelMax.
It main features:

  • Taller print height by placing the side columns vertical, and widen the space between the the top horizontal beams to allow the extruder assemble to protruded pass the beams.
  • With the side columns vertical and closer toward the center of the printer, one has better accessibility to the print bed and extruder.
  • More height under the bed to accommodate the mounting of power supply, controller, and control panels.

The T MAX uses all the same major components as the MendelMax. If you have a MendelMax, it can be easily converted to a T MAX; or assemble a T MAX from a MendelMax extrusion and hardware kit.
The T MAX is design to use low maintenance Igus pillow block bearings, a RAMPS 1.4 controller, and a common eBay 12VDC, 30A power supply.

Maximum print size is approximately X 210mm, Y 210mm and Z 210mm.

T MAX LCD & SD Control Panel: http://www.thingiverse.com/thing:29903
T MAX Spool Holder: http://www.thingiverse.com/thing:29883


See illustrations for locations of parts. Assemble using MendelMax components and fasteners.

Special instructions:

  • Drill two 6mm holes (140mm apart, symmetrically from center) on the top two horizontal aluminum extrusions of the base.
  • Fasten the bottom of the vertical extrusions using 40mm long, 5mm bolts and 15mm OD washers (3/16 X 1-1/2 stove bolts will also work). Don't forget to tap the holes to suit the bolts used.
  • Run the bolts through the whole cross-section of the horizontal extrusions. This will add greater strength to the assembly.

The higher Z axis will require a pair of longer thread rods, 400mm long.

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i have a question.
can some one help me with a user manuel form the T-Max.

Are the printed brackets on the t- slot frame, z axis, fairly strong and rigid? Trying to decide if i want to use them for a printer Im making other than just for aesthetics.


Anyone can inform me Whats the real dimensions for frases of this printer? I need tô cut aluminum extruder bar exactly.
thank you

Mar 3, 2016 - Modified Mar 3, 2016
HLMAX - in reply to PCDiniz

My printer has these extrusion dimensions:

4X 30cm for the X axis extrusions.
6X 42cm for the Y axis + top two beams.
4X 34cm for the Z axis, the vertical columns.

You don't have to use these dimensions. My extrusion set was meant for the MendelMax. You can use different sizes, as long as you use the right lengths of guide rods, thread rods, and belts to match your frame. These sizes do fit a 215mmX215mm PCB heated bed perfectly. For a bigger print bed, you can just scale it proportionally.

Is it possible do You share your firmware for T Max with all setup?
My email is [email protected]
Thanks a lot.

Is this the TMAX 2.0?

Jan 20, 2015 - Modified Jan 20, 2015

Great work ! I want to make it :)

Can you give to me the size of the extrusion bars please ?

20x20 aluminum extrusion

Thank you for the answer, I wanted the size, not the thickness

size is referring to thickness or also dimension of the printer, I guess what you want is the length of the aluminum, and it should be the same length as original mendelmax printer

EXCELENT !!!????????????????

Dec 19, 2014 - Modified Dec 23, 2014

Is there any part from mendelmax 1.5 can be recycled to be used for T-MAX?, and which igus pilow bushing that you use?

this one?


Awesome desing, i am planning to build it. How long must the aluminium bars/extrusion be? thanks

Awesome design! I am making a plan to build this. Is the distance between the upper and lower frame assembly the same as in the Mendel Max? If not, what is the new measurement?

Would you mind uploading the upper and lower z in a 10mm smooth rod form please

If you are using a different size or type of bearing, depending on the parameters of the bearing, many parts of the X and Z assembly may need to be changed,
Sorry, but I have no plans to adapt the T MAX to other parts that I am not using. No way to proof that the new parts will works.

I like the design but I don't think that the z threaded rods should be confined in 3 points: motor shaft, end and just above the coupler. Unless you have super straight threaded rods, you'll have z wobble. Its best to take out the additional constraints.

 Each Z thread rod does indeed only have two restrain points, one 608 bearing at top, and the Z motor flex coupling.
Sorry about the confusion with the naming of one of the parts: Z THREAD ROD BEARING MOUNT BOTTOM. This part has only a pass through hole for the thread rod and does not mount a bearing. The part came from another printer design I was working on.

Nice design. I'm working on a design that is on a similar path with a T/I shape but longer on the X axis using sliders. Would you have any objections if i use the same measurements for the top Z mounts along with the same height for the lower frame section? I can see there being an advantage to get a standard size for this design the same way the Mendel Prusa's and MM has.

Use what you need. Standardization is the reason that the T MAX uses the same aluminum extrusion sizes as the MendelMax; so it can easily be made from any MendelMax kit.

nice design. I'm planning on building one, instead of a MendelMax. 
I'm currently figuring out which plastic parts I have to have made, and how many of each.

Can you adapt the filenames of the stl-files, so they have the amount of copies needed included in the filename? This is the case at the MendelMax, and helps a lot.

Keep up the good work, and I'll send you a photo once I got my T Max up and running!

Thanks. Looking forward to see your build.

Here is the quantity list of parts:


All other parts, one each.


where are there parts?

oh, just not in the ZIP

Thanks! You will be hearing from me in a few weeks when all shipments have arrived.

Awesome design! I was wondering: What's the spacing between the threaded and smooth rod for the Z axis? (distance between the 2 inner edges)

Distance between the Z thread rods is 370mm on center.
Distance between the 8mm smooth Z rods is 430mm on center.
30mm on center between the thread rod to its closest smooth rod.

I have a half built MendelMax that is now going to be a T MAX. This design makes more sense.

Very nice design, I like that you are using igus pillow blocks.

Which extruder/ hot end would you recommed?


I have two printers using J-Head Mk IV-B with 0.35 nozzle, and a derivative of Greg's Wade extruder+ herring bone gears. So far so good. No problems what so ever.

Hi, like the design. The nut traps on the X axis, for the Igus bearings seem a little large. Are they SAE or Metric? The parts are printing perfectly, hope to have one built by the end of the week.

Thank you


Thank you, Are you going to post a wiki for this design?

I have't done a wiki. I'll look into it.


To be more flexible with hardware, the parts are design for the larger SAE fasteners. Mostly 4-40, 6-32, 10-24 fasteners. Metric fastener will work fine, the nut trap will be looser.

Very interesting design and I am thinking about giving it a go but I have a few questions firts:

1)What is the new build height. I know that this is dependent on your specific combination of build plate and hotend but what improvement were you able to see?

2)Was this designed in Alibre or Solidworks? If so, could we also get the source files (.STEP, .SAT, .SLDPRT, etc.)?

Thanks much, look
s great!

You rock! Thanks for getting back to us so quickly! Wouldn't at all be surprised if this becomes a very popular build!

Maximum build height is 235mm.

That is assuming that the hot end extends less than 45mm below the bottom of carriage, and no portion of the extruder, 30mm above the top of the carriage, is more than 120mm wide front to back.

With most configurations, you can get the full 235mm build height.

STEP files are uploaded.

Please could you ZIP up all the files, this will make it easier for those of us who do not have broadband, yes still in 2012 this is the case!

Many thanks and I want to build a T Max!