Is this 3D model free to download?

Yes, "Borg" collet style 2"-to-1.25" adapter for telescope eyepieces is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by jmcvey, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

"Borg" collet style 2"-to-1.25" adapter for telescope eyepieces 3D printable model by jmcvey

"Borg" collet style 2"-to-1.25" adapter for telescope eyepieces

Source: Thingiverse by jmcvey

The "Borg" collet style 2"-to-1.25" adapter for telescope eyepieces is a free printable 3D model from Thingiverse by jmcvey. Sometimes you just need another 2" to 1.25" adapter for your night of telescope observing. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

30 saves Source: Thingiverse Updated 2026-10-22 License: CC-BY-SA · commercial OK Category: 3D Printer

Tags: eyepiece adapter, eyepiece holder, telescope adapter, Telescope focuser, telescope parts

About this model

Sometimes you just need another 2" to 1.25" adapter for your night of telescope observing. This is a style that I originally saw in a Borg catalog (perhaps Hutech). It is non-marring and uses the thumb screw in your 2" eyepiece holder to squeeze and secure your 1.25" eyepiece. I print it in PETG because it's flexible and doesn't crack. I used concentric pattern for top and bottom layers for best appearance. No supports are needed. I've provided the openSCAD source file I created in case you need to modify it slightly for your setup.

Frequently asked questions

Is this 3D model free to download?: Yes. "Borg" collet style 2"-to-1.25" adapter for telescope eyepieces is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by jmcvey.
Who made this model?: Designed by jmcvey, published on Thingiverse. 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.