A couple of months ago I made this robotic gripper, it’s compatible with a standard servo so any servo fits in it. I saw this site: http://www.diniro.net/fabbblog/2008/03/diy-how-to-build-a-robotic-arm.html. This guy made a robotic arm, and I used the global plan of the gripper, modified it and drew it in autocad. The autocad drawings I converted to Gcode and I did mill it with my cnc machine.The gripper is made of 4mm hardboard, and the screws are m3. For the gripper itself you can use m3 with nylock nuts.
Here is a link to download the drawings:
Here’s a little video of it:
Today I converted the autocad drawings to a Solidworks drawing, and made a assembly of it:
Here’s you can see the back-plate of the gripper, the holes in it are for connecting it to a standard servo horn. (So it is not compatible with my robotic arm and its also to heavily, so I’m thinking of making a gripper for a mini-servo).
Here’s a picture of how the gripper works:
Let me know when you made one to 🙂 Hope you like it!