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Rack & Pinion Robotic Gripper Jaw

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Creation quality: 4.8/5 (3 votes)
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  • 15.6k views
  • 22 likes
  • 614 downloads

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3D design format
STL Folder details Close
  • Gripper_Base.stl
  • Gripper_Jaw.stl
  • Gripper_Pinion.stl
  • Gripper_Rack.stl
  • Jaw22-70.stl

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Publication date 2019-01-30 at 09:04
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Published to Thingiverse on: 2017-11-21 at 21:59
Design number 44798

3D printer file info

3D model description

Servo Controlled Robotic Gripper using rack & pinion drive for parallel jaw movement

https://youtu.be/Qfd0ikdnAsg

This is a robotic gripper/jaw that uses a low cost Tower Pro MG996R servo.

As opposed to some grippers that use a lever action, this directly drives both jaws with a rack and pinion action.

It therefore has slightly more grip that traditional lever grippers and the jaw movement is totally parallel.

It could be easily modified to fit on to a robotic arm.

It requires:
1pcs Tower Pro MG 996R servo motor (approx price UK Β£5 / US $10)
M3x15mm Screws (4 pcs)
M3x10mm Screws (4 pcs)
M3 nuts (8 pcs)

To drive it, I used a servo motor test board and a USB phone charger (2.5A) But you can also use and arduino.

Servo tester board:
https://www.banggood.com/Servo-Tester-Third-Gear-Switch-With-Indicator-Light-4_2V-To-6_0v-p-1079862.html

Oct 2018 - I've added an alternative JAW that has a wider opening of about 70mm, but obviously only closes to about 22mm. This was for a request to enable the jaw to operated a Rubik's cube of about 57mm Square. Please note that I haven't test this, so hopefully it'll print and function correctly.

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