Is this 3D model free to download?

Yes, Precision Driver Adapter (4mm & 3.5mm) is free to download from MyMiniFactory. Open it in the free Thinger app, or use the "Download from MyMiniFactory" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by MyMiniFactory. Use the "Download from MyMiniFactory" 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 Jim Dewhurst, published on MyMiniFactory. 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.

Precision Driver Adapter (4mm & 3.5mm) 3D printable model by Jim Dewhurst

Precision Driver Adapter (4mm & 3.5mm) photo 1

Precision Driver Adapter (4mm & 3.5mm) photo 2

Precision Driver Adapter (4mm & 3.5mm) photo 3

Precision Driver Adapter (4mm & 3.5mm) photo 4

Precision Driver Adapter (4mm & 3.5mm) photo 5

Precision Driver Adapter (4mm & 3.5mm)

Source: MyMiniFactory by Jim Dewhurst

The Precision Driver Adapter (4mm & 3.5mm) is a free printable 3D model from MyMiniFactory by Jim Dewhurst. This is a precision bit driver adapter I made in Tinkercad. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from MyMiniFactory

396 saves Source: MyMiniFactory Updated 2026-10-09 License: DOWNLOAD-SHARE-MAINTAIN-LICENSE-CREDIT-REMIX-NONCOMMERCIAL · non-commercial

Tags: adapter, screw, Screwdriver, precision, drill, bit, driver, power_screwdriver, torx

About this model

This is a precision bit driver adapter I made in Tinkercad. I wanted an adapter to use my precision bits in my power screwdriver that would allow me to use both my 4mm bit set and my 3.5mm bits from my reversible screwdriver. I tapered the inside hole so it would fit the shorter 4mm bits and my longer 3.5mm bits. I chamfered the back end and added a hollow along the neck so it would work with driver extensions with ball bearing retainers.

Frequently asked questions

Is this 3D model free to download?: Yes. Precision Driver Adapter (4mm & 3.5mm) is free to download from MyMiniFactory. Open it in the free Thinger app, or use the "Download from MyMiniFactory" link above to open the original listing.
Where is the STL hosted?: The download is hosted by MyMiniFactory, not by Thinger. We link you directly to the original listing by Jim Dewhurst.
Who made this model?: Designed by Jim Dewhurst, published on MyMiniFactory. 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.