Tennis Serve Trainer Aid

thingiverse

This tool will help you master your proper tennis serve motion, timing and power with impressive results. It truly delivers on its promise and replaces the socks shown in the video, check out this guy's explanation of how to use it at https://www.youtube.com/watch?v=oVh7tsa2R6I. The grip size of this design is 4 3/8 or G3. Print Settings Printer: Wombot Exilis Rafts: No Supports: Yes Resolution: 300 micron or less Infill: 25% triangular Notes: With a 0.4 mm print head nozzle, the wall line count is 3, while with 300 micron resolution it's 4 on top and bottom. The butt sits firmly on the print bed. Your printer should easily handle parts up to 6.5" or 165 mm tall. How I Designed This To build this tool, you can use various braided cords for the center, but make sure they have enough strength to withstand centrifugal force. Feed the cord through the handle and tie a knot at the racquet handle butt to prevent it from slipping through. For the head part, I used 4 soft tennis balls that I had at home. To create the ball holder part, you can get creative – I made a tube using strong window blind material with an overlocker. An sewing machine will also work, but it's simpler and faster with an overlocker. You can also stuff the balls into a sock and tie it to the end of the cord, ensuring that the overall length is no longer than 27" or 685 mm. Some kind of net tube would also be effective if the netting is strong enough. To finish the creation, I wrapped proper tennis over grip on it to simulate the racquet handle feel. Weight Adjustment You can adjust the weight by using up to 4 balls. I wouldn't recommend going higher than that. If you want more weight, consider cutting a small hole in one of the tennis balls and squeezing some liquid nail adhesive through it. Let it dry for a while to allow the glue to set, then fill another ball if needed. Liquid nail is cheap and flexible, so it won't cause any injury. Note: don't block the hole so the glue can set properly. If you filled one tennis ball with liquid nail and still need more weight, repeat the process on a second ball with the appropriate volume of adhesive to reach your desired weight.