How to Sand an Inside Curve

By Michelle Hogan

Sanding the inside curve of an object can be one of the more challenging tasks in woodworking -- not because it's difficult but because it requires persistence to get it right. One of the easiest ways to sand an inside curve is to use a drum sander on a small rotary tool or drill. However, even after using this type of tool, you may still have to hand sand the curve in order to get the smoothest finish possible.

List of Items Needed

  • Sandpaper
  • Dowel
  • Masking tape
  • Rotary tool with sanding accessories
  1. Wrap a piece of sandpaper around a dowel or your finger to work the inside edge.

  2. Secure the sandpaper around the dowel with masking tape. If you are using your finger, simply hold it with your thumb to secure it.

  3. Rub the inside edge of your piece with the dowel-wrapped sandpaper, moving up and down and side to side as needed. When sanding an inside edge, it's not as important to work with the grain of the wood.

  4. Use a sanding sponge to finish the edge. Cut the sponge smaller if the inside curve is tight.

  5. Use a sanding accessory on a rotary tool to sand an inside larger curves more efficiently. Lightly hold the tip of accessory against the edge you are sanding while holding the rotary tool in your hand. Make multiple passes along the edge while the tool is turned on until you achieve your finished look and feel.

Tips and Warnings

  • A curve with a diameter less than an inch may not be sandable with a machine.

© Demand Media 2011