125:1 triple-belt gearbox for Dobsonian drives (HTD 3M 80T/16T, NEMA 17, adjustable belt tension)
Source: Cults3D by CBVBOGDAN
The 125:1 triple-belt gearbox for Dobsonian drives (HTD 3M 80T/16T, NEMA 17, adjustable belt tension) is a free printable 3D model from Cults3D by CBVBOGDAN. 3D-printed 125:1 reduction gearbox to motorise the altitude and azimuth axes of a Dobsonian telescope. You can download the STL file from the original listing below and print it at home.
About this model
3D-printed 125:1 reduction gearbox to motorise the altitude and azimuth axes of a Dobsonian telescope. project here: Three identical belt stages (HTD 3M, 80T/16T pulleys, 5:1 each) are arranged in an equilateral triangle. All three stages share the same centre distance, so the same 288 mm belt is used everywhere, and the output shaft ends up coaxial with the motor shaft, one level higher. KEY FIGURES - Reduction: 5 x 5 x 5 = 125:1 - Pulleys: 3 x HTD 3M 80T + 3 x HTD 3M 16T, 10 mm wide - Belts: 3 x HTD 3M 288 mm (96 teeth), 10 mm wide - Centre distance: 64.79 mm - Footprint: 166.8 x 158.1 mm; height 110 mm (158 mm with mounting flanges) - Motor: NEMA 17 (42.3 x 42.3 x 40 mm), 5 mm shaft - Output: 8 mm shaft, 20 mm protruding - 400,000 micro-steps per output turn at 1/16 (about 3.2 arcsec pe…
Frequently asked questions
- Is this 3D model free to download?
- Yes. 125:1 triple-belt gearbox for Dobsonian drives (HTD 3M 80T/16T, NEMA 17, adjustable belt tension) is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link above to open the original listing.
- Where is the STL hosted?
- The download is hosted by Cults3D, not by Thinger. We link you directly to the original listing by CBVBOGDAN.
- Who made this model?
- Designed by CBVBOGDAN, published on Cults3D. Please credit the creator when sharing your print online.
- Can I print this at home?
- Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.
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