Bill Of Materials


Printed Parts

There are 3 different sets of printed parts C-23.5mm, F-25mm, or J-25.4mm (1in). The measurement is for the Outside Diameter of the conduit/rails/tubing. Please measure your rails before printing. 23.5mm fits 3/4″ EMT conduit in the US. Anywhere else you must physically measure first, some things are sold as Inside Dimension (ID) (conduit), or Outside Dimension (OD) (Tubing). Bummer

Steel hardware store EMT conduit works well and is inexpensive, an upgrade would be .049″ wall thickness stainless steel tubing (or thicker is fine as well). Stainless Steel tubing is more rigid and smooth, but also much more expensive.

Recommended Print Settings; PLA for dimension accuracy (PETG is also good, if your dimensions are verified good), 2 or more perimeters for through hole strength. There are some steep walls so no more than 75% layer height to nozzle diameter, no support should be needed for any part I have designed.


23.5 Link
25mm Link
25.4mm Link
Total time
Grams Per Part
Total grams
2*-Roller M55%LinkLinkLink 5:35 11:10 90180
55%LinkLinkLink 3:301450200
4RollerPlate (optional Dual)
55%LinkLinkLink :10:4028
2XY_*_Burly55%LinkLinkLink 1122 201 402
65%LinkLinkLink 5 10 71.5 143
2Gantry_Spacer_*55%LinkLinkLink :22 :45 10.3 10.3
2Nut_Trap_Burly55%LinkLinkLink :27 :55 16 32
1Tool_Mount_*_4mm/6-3235%LinkLinkLink 4:45 4:45 63.463.4
1Z_Lower_*_Burly55%LinkLinkLink 2:15 2:15 35 35
1Z_Motor_*_Burly55%LinkLinkLink 2:15 2:15 31 31
        Total  Total
       ≈115hrs  1.8kg

My current full set prints in 91 Hrs.

* =the asterisk stand for part letter (C, J, F) and anything after that is the current revision (Burly, v1, v2)

M = Mirrored parts, either see the build instructions of FAQ’s if you are worried.

Printed Parts Changelog

10/15/18 – Burly Center & Z

4/1/18 – Optional dual plate.

3/19/18 – New foot.

5/9/17 – lead screw compatible XYZ

7/13/16 – New Rollers

5/25/16 – New middle and Z-Axis assemblies

4/24/16 – New corner assembly




Electronics/Motion Parts

Recommended electronics, you have a lot of options. I chose these specific parts for price vs. performance.

Some of these are affiliate links, you can buy from these links or just use them for information. In case you didn’t know amazon prime is free for students, and here is free 30 day trial for non students.

 1 Mini-RAMBo (or RAMBo)Amazon Or Shop
112v ≥5A power supplyAmazon Or Shop
1GT2 belt (4M = 24″x24″) Do not get the steel re-enforced ones.Amazon Or Shop
4GT2 16T PulleyAmazon Or Shop
53608 2-RS BearingsAmazon Or Shop
≅18ftRails (Conduit or Stainless Steel)info, info – Cut Calculators
5Nema 17 SteppersAmazon Or Shop
1Wiring harness (Or extended your stepper plugs with Stranded Wire)wiring kit, Stranded Wire
≥20Zip Ties Amazon Or Shop
Spindle Options
 Best option 
1Dewalt 660 (600W) 120VAmazon
 Second Choice 
 Spindle 300W-800W AmazonAliExpress

Blank tool mount for any other tools you might want to use.



Hardware needed.

1T8 Leadscrew and nutT8 Amazon or Shop
1Lube for the T8 Shop
15mm-8mm coupler Shop
1 5/16-18 X 5M8 X 130 Amazon
 12 5/16-18 X 2.5M8 X 65 Amazon
 2 5/16-18 X 1.5M8 X 40 THESE CAN NOT BE CAP HEADS (or you will need to grind them a bit) Amazon
28 5/16-18 X 1.25M8 X 30 Amazon
 43 5/16-18 Nylock NutsM8 Amazon
 19M3 X 10M3 X 10 Amazon
57#6-32 X.75***M4 X 20 Amazon
57#6-32 Nylock nuts***M4 Amazon

***  The difference in the size of nuts requires some creative tightening if you don’t use #6’s on a few parts. A small flat head screw driver can usually be wedged in to stop the nuts from rotating if you have an issue.

Or, here are some quick print sleeves,