Remix from https://www.thingiverse.com/thing:1480408
Heres the Gripper for for Modular Robotic Arm.
it doesn't use any hardware except for what comes with a 9g servo. It gears the Servo down
3:1 and moves the jaws opened and closed keeping them both centered
Here is the robot that its for: http://www.thingiverse.com/thing:2153317
I Also included the Fusion Project
For More Cool Projects and Upgrades, Don't forget to Follow Me on Thingiverse and Check out my Youtube Channel, Gear Down For What?https://www.youtube.com/channel/UCERyl8JwFJuCISJfcnpCvwA