Oliver Cletrac OC3 (modular)

This is more modular version based on Haggy_23 (created by) and Ettena (remixed by) Cletrac OC3 1:6 scale tractor. https://www.thingiverse.com/thing:4159135 https://www.thingiverse.com/thing:4875535

For visual modifications I used pictures from internet. Found one image with cabin and used it as blueprint for cabin.

Most parts are assembled with M3 bolts and nuts. All details for parts and assembly guide you can find in FreeCAD (.FCStd) file. Also this freeCAD file includes all .stl parts for complete printing result. You do not need to download all files separately, if you have freeCAD.

I used ZGB37RG 60rpm 12V motor, but for better torque I recommend lower rpm motor. For terrain like grass, my motors are to weak.

Parts with fewer details I used 0.3mm layer height. Smaller parts printed with 0.2mm or 0.15mm layer height. If you want better visual quality, then use 0.15mm layer height.

Printed parts:

• 22 x original parts (no modifications)
• 133 x modified & new parts

Mechanical parts:

• 2 x M2 10mm bolt (roof light)
• 2 x M2 nut (roof light)
• 14 x M3 6mm bolt (12 pcs to motors)
• 2 x M3 8mm bolt (seat spring)
• 12 x M3 10mm bolt
• 17 x M3 12mm bolt
• 6 x M3 12mm bolt (without head)
• 8 x M3 14mm bolt
• 6 x M3 16mm bolt
• 78 x M3 18mm bolt (62 pcs for chain)
• 9 x M3 20mm bolt
• 3 x M3 25mm bolt
• 8 x M3 40mm bolt
• 79 x M3 nut
• 70 x M3 nut (self locking) (62 pcs for chain)
• 18 x M4 14mm bolt
• 18 x M4 nut
• 2 x M6 40mm bolt (countersunk) (for lead wheel)
• 2 x M6 nut (self locking) (for lead wheel)
• 2 x ZGB37RG motor 2 pcs
• 2 x 10x10x220mm aluminium square tube
• 10 x 10x2mm round magnet
• 6 x 13x5x6mm ball bearing

Notes:

• It takes around 160 hours to print (if only 1 printer is used)
• Parts are designed for 0.3mm or 0.2mm layer height
• Some parts are printed with brim
• Longest print time for one part is around 9 hours (if 0.3mm layer height is used)
• I used A2 stainless steel bolts & nuts
• Some original parts must be glued together, I used "4 minute" epoxy.
• oc3_print_mod_y_part_005 adds some strength but is not directly necessary. Designed as place holder for servo mount (future upgrade).
• You can use 5050 SMD LED's for roof lights. As light covers, use TAMIYA High Lift truck (or analogs) roof lights glasses.
• chain_link_mod_y_left.stl & chain_link_mod_y_right.stl are based on original design. But this type chain caused to much wobble. For better stability use oc3_print_mod_y_part_072.stl & oc3_print_mod_y_part_073.stl
• You need to print 31 pcs left side chain links and 31 pcs right side chain links.
• Parts orientation in .stl files are random. You need to position them correctly yourself. Most parts do not need support if you place these right way.

Print Settings

Printer Brand:

Creality

Printer: 

Ender 3

Filament: gembird PLA+

Category: R/C Vehicles

I redesigned most of all components. All original (unmodified) parts file names include word “original”, all other are my own design from scratch.