Violin Bow Pinky Rest TPU/PLA Aid for Young Souls

This 3D-printable Violin Bow Pinky Holder is designed to support young violin students during their first months of learning, helping them develop the strength and control needed for a proper bow grip. 

The accessory securely attaches to both the bow and frog, providing a comfortable and stable resting point for the pinky finger.
 

Optimized for TPU filament, the design ensures a snug yet flexible fit. The print orientation has been carefully adjusted to keep all seams away from contact areas, enhancing comfort while minimizing stringing issues.
 

Tested with a 6-year-old TPU filament, this model is expected to perform even better with fresh TPU, reducing stringing and improving overall print quality.
 

Size & Adjustments: This model is designed to fit students from 6 to 7 years old. If you find it useful but need a different size, feel free to mention it in the comments!

Disclaimer: I worked this specifically for TPU, relying on its flexibility to provide a secure fit without damaging the bow. Printing with non-flexible materials will not fit properly at best and may scratch your bow at worst.  Instead,  If you’re interested in a rigid version, let me know in the comments!

----------------------------------------------
Thank you for the great response to the original model!!!.
----------------------------------------------
 
✨ NEW 30-11-2025!! ✨
An alternative Rigid PLA variant of the Violin Bow Pinky Holder is now available.
 

Because PLA has no flexibility, I increased the hole sizes and the spacing around the bow to prevent scratching or damaging the instrument.

As a result, this PLA version is, by design, not meant to attach firmly to the bow.
 

🔧 Attachment (PLA VERSION)

To keep the accessory securely in place, I tested several solutions that anyone can apply. So far, the simplest, most effective, and instrument-safe method has been to place a few strips of duct tape (or similar) on the inner surfaces of the pinky holder before mounting it (see attached photos) . This adds gentle cushioning and enough grip to hold the piece firmly while still protecting the bow.
 

🎻 Recommendation

If possible, I strongly recommend choosing the TPU version instead. This alternative PLA version is intended for users who need to print immediately and do not have TPU available.