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Center Finder Tool for Circles and Wheels

Center Finder Tool for Circles and Wheels, design preview, hero tilt

Design preview. Rendered from the file, not a photo.

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What it does

  • Finds the center of any circle quickly
  • Two angle versions: 90 and 110 degrees
  • Saves time aligning gears, wheels, and shafts
  • Marker groove guides a clean line across the part
  • A staple for makers, hobbyists, and shop workers

You set the tool against a wheel and the marker draws a line straight through the center. This center finder uses simple geometry to bisect any circle: align the inner edges to the outer edge, draw a line, rotate, and where the lines cross is the center.

Two angle versions cover real cases. The 90 degree handles smaller wheels, the 110 degree fits larger ones. The marker groove guides a sharpie or marker for a clean line.

Use it for aligning gears, wheels, robot servos, and any project where a circle needs a center mark.

8.2k downloads in the maker community. That is interest in the design on the site it came from, not our sales.

What you get

  • This design prints as one piece.
  • Nothing else to print or buy for this to work.

What it is made of

Designs like this print well in PLA. Compare the materials.

Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.

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Who made this design

Designed by KikiTay. We did not draw it.

Shared under Creative Commons, credit required. See the original design