Cassette Hand Winder

thingiverse

Hand winders for compact audio cassettes were once affordable and easily accessible, but today they're scarce, pricey, and often require importing from abroad, adding extra costs to the purchase. This project brings cassette winders within reach of anyone with a 3D printer and basic crafting skills. The winder can be used to loosen old tape, lubricate it, or rewind tape while another is playing in the background. The author regularly uses it to assess the condition of used cassettes by examining the reflection as they wind from one end to the other. This project utilizes five miniature ball bearings, each measuring 3x8x3mm and available on Ebay, to minimize friction. Additionally, fifteen No.4 x 1/2" (3x12mm) self-tapping screws are required for assembly. The turns ratio is approximately 1:10. **Caution:** Due to the size of the lever and potential winding speed, it's possible to damage the cassette as it reaches a hard stop at the end of the tape. To avoid this, slow down and wind gently near the ends. The author disclaims any responsibility for damage caused by using this device. This project has been surpassed by [version 2 of the winder](https://www.thingiverse.com/thing:4136188).