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Replacement white key for the Technics KN-5000 piano keyboard

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3D model description

This is a replacement for the white keys on the Technics KN-5000 piano keyboard, and may also fit others (let me know if you try it!). The key may have to be mirrored when printing depending on which key you're trying to replace.

PLA seems to work fine for this although Nylon might result in a more durable key. In PLA this key weighs 16g as opposed to the original's 13g but there's no detectable difference in feel. After printing light sanding may be required if your printer tends to leave sharp edges or burrs but I didn't find this necessary when printed on an Ultimaker 2+

To fit this key you remove the covers (turn off and unplug first!) then press down firmly on the back of the broken key to release it from the retaining bar, squeeze in the tags and push it forward to remove. Be careful as there's a spring under there that will try to pop out. To install the new key, carefully center the spring on the retaining pillar in the print then push the key down and back to reinstall it under the retaining bar, being sure to seat the front retaining arm under the bar at the front of the keyboard.

3D printing settings

0.1mm Layer height
0.6mm nozzle (would also work fine with 0.4mm)
Gentle fan only
Infill doesn't really matter for this design
Support will be required

  • 3D file format: STL
  • 3D model size: X 22.1 × Y 155 × Z 37.5 mm
  • Publication date: 2021/05/04 at 13:00





Electronics Engineer from Reading with some Mech.Eng. training. Mostly doing 3D printing for work making assorted parts for high-voltage assemblies but also designing and printing random items I find useful. Strong preference for keeping the entire toolpath open-source but will use commercial software where it's really needed.

I also do a lot of 3D design work for rLab, Reading's hackspace to help with maintaining the supporting the equipment and keeping the building clean.

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