Tennis Swing Trainer – Hinged Racket for Beginners

Tennis Swing Trainer – Hinged Racket for Beginners

Make swing feedback visible. This two-piece tennis practice racket uses a moving hinge to help demonstrate racket control: the head can fold instead of staying rigid. It is designed to give kids and beginners an immediate mechanical cue when a swing is led incorrectly.

Print the head and handle, assemble the pivot and explore the movement at a slow, controlled pace. No electronics, sensors or batteries—just a simple mechanism you can see and feel.

What makes it useful

• A visible moving joint for coach-led explanations and beginner practice.

• Two complementary printable parts: one racket head and one handle. Both are included.

• A real physical build: the gallery and animation are extracted from the creator's video, showing the assembled print and hinge movement.

• Separate manufacturer-specific projects, with the original geometry and scale preserved.

How to use it

1. Assemble the head and handle at the matching pivot features and check that the joint is retained securely and moves freely.

2. Start with slow, controlled dry swings in a clear space, preferably with a coach or supervising adult.

3. Watch and feel how the hinged head responds. Use that feedback to discuss racket movement and control, then reset and repeat.

The demonstration shows hinge movement; it is not a calibrated measurement of tennis technique or a promise to detect every swing error.

Files and printer fit

Download both tenis_head.stl and tenis_handle.stl for the complete model. They are separate assembled parts, not alternative versions and not colour layers of one object.

At original scale: - Head: approximately 249 × 381 × 23.5 mm. - Handle: approximately 92 × 357 × 29 mm.

These are large parts. A typical 220–256 mm bed is not sufficient for the supplied flat layouts. Do not scale the two pieces independently: the pivot fit and function depend on their matching dimensions.

Prepared configurations use a 0.4 mm nozzle, 0.20 mm layers and five walls. Bambu H2S and Prusa XL use PLA and 20% gyroid; Creality K2 Plus and Anycubic Kobra 3 Max use PETG and 35% gyroid. Supports are enabled. The H2S head is tilted to fit its bed and consequently needs substantially more support than the larger-bed layouts. K2 Plus retains the stock CFS configuration; it is not an external-spool conversion.

Open each complete project in its matching manufacturer's slicer, check the named machine and your actual filament, and re-slice before printing. The new printer configurations have been digitally sliced and reloaded; the original-build video is not a separate physical test of every supplied configuration.

Printing and assembly

Print one head and one handle at the same scale. Allow both to cool, remove supports carefully around the pivot and dry-fit the joint. Do not force a binding hinge. Confirm secure retention before moving the assembled racket. Inspect the joint and printed layers regularly and replace damaged parts.

Practice safely

For controlled, low-speed dry practice and demonstrations—not for striking tennis balls or other objects. Keep fingers away from the hinge and leave room around the full racket. Children need adult supervision. This is not certified sports equipment or a certified children's toy, and no load, fatigue or impact rating is claimed.

Original design by Jindrove. Non-exclusive release.