A phone cradle with Garmin Quarter turn mount #3dThursday @Brian_Dorey

Brian Dorey wanted to be able to mount the phone into an existing Garmin bike computer mount using the quarter turn locking system which all Garmin computers use. But I no one made a suitable conversion bracket.

KOM Cycling make a product called “KOM Cycling Garmin Edge Universal Phone Adapter” which is a small plastic mount which goes into the Garmin quarter turn mount and fixes to your mobile phone with a 3M adhesive pad.

As I don’t want to keep the mount fitted to my phone all the time, making a phone holder which then has the KOM mount fitted seemed to be the best solution.

We had an offcut of 10mm thick clear acrylic in the workshop and Andrew designed a cradle for the phone in Autodesk Fusion 360 and this generated the G-Code for our CNC mill to cut the acrylic sheet.

The phone cradle is designed for an Apple iPhone 10x and iPhone 11 pro with the phones in the official Apple rubber or leather case. The design can be modified to fit other phones and can be 3D printed if you do not have access to a milling machine.

The design files can be downloaded in a ZIP archive which contains the following formats: .iges, .step and .stl files.

See the video below and the blog post for additional details.


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