Circle Centering Jig for Cylinders, Tins, and Discs

Design preview. Rendered from the file, not a photo.
This model is not currently offered as a verified ready to buy print.
What it does
- Guides a pencil toward the middle so you can mark a center point fast
- Two straight edges line up on round objects so lines meet at the middle
- Handheld shape works on cylinders, tins, and discs of many sizes
- Offset guide edge accounts for pencil tip width for a straighter line
- Made to order in the USA after you place your order
Centering jigs come in many shapes. This one is built to guide a pencil straight toward the middle of any round object. Set it against a cylinder, tin, or disc, trace a couple of lines toward the center, and see where they meet.
The jig has two side edges that rest against the curved surface, plus a guide edge that points your pencil toward the middle. The guide edge sits with a small offset built in, made to account for the width of a pencil tip when you trace your lines.
It works for woodworking layout, shop marking, or any project where you need to find the middle of a round part. Rest the jig against your workpiece, draw your lines, and find your center point without measuring or guessing.
This is a handheld tool shaped for round stock in a workshop. It is made to order in the USA after you place your order.
5.2k 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 We have not load tested this design, so we do not publish a weight rating.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 atuor. We did not draw it.
Shared under Creative Commons, credit required. See the original design