3D Printed Servo Gripper
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This mechanism converts the rotational motion of a servo motor into a clamping motion.
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Model information
- Source
- Printables
- Category
- RC & Robotics
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
This mechanism converts the rotational motion of a servo motor into a clamping motion using a gear-driven four-bar linkage system. Designed for hobby robotics, pick & place tasks and students.
1. Gear Specifications
Standard: Spur Gear
Pressure Angle: 20°
Module: 1.25M
Teeth: 18T
Pitch Diameter: 22.5 mm
2. Theoretical Calculations
A. The horizontal distance between the two gear centers
B. Position Analysis (Four-Bar Linkage)
C. Recommendation: Limit the servo rotation to the specific range of 120° to 35°.
Why: To prevent mechanical interference between the components
120°: Fully Open position.
35°: Fully Closed (Grip) position.
3. Hardware
Joint Assembly Method For simplicity, the joints use a Screw and Double-Nut (Jam Nut) setup. The nuts lock against each other to maintain clearance for movement.
Alternative: Pins or Shoulder Screws.
4. Assembly & Design Videos