How to make a perfect gear with Adobe Illustrator This is using the Mac * In Illustrator draw the circle of the gear. Mark the center with guides. * Draw the tooth of the gear. * Place gear, overlapping the edge of the circle a little. * While the tooth is selected Press R and place the rotation center point at the center of the circle. Click the center while holding down the option key. * In the Rotation dialog box put in the degrees of Rotation. 10 degrees for 36 teeth. Click copy * This rotates a copy of the gear. * On the Mac press command/apple D to duplicate the last action. A new tooth is created and rotated on the circle. Keep pressing command D until all teeth are placed. * Select all the teeth and circle and using the Pathfinder palette, click on first icon in the upper left. It looks like 2 squares merged. On Illustrator 10 and CS press EXPAND after. * Now you have a perfect gear that can be saved as Illustrator 8 and bellow to use as a template in Carrara