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Robotic Hand - 3D Print Files
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- Description:
- STL and 3MF files and user manual for a proof of concept low-cost 3D printable robotic hand and controller. User manual includes assembly instructions and a bill of materials for the hardware/components used.
- The hand and controller enclosure are assembled using mostly standard, off-the-shelf components available from typical online retailers including standard servos for each finger, a micro servo for thumb base rotation, and metric fasteners and heat inserts.
- The hand and controller can be printed from PLA, PETG, or other rigid, cost-effective filaments, and the hinges, finger/palm pads are printed from flexible TPU filament.
- Specifications:
- Mechanical:
- Degrees of freedom:
- 6 active via servos
- 9 passive via TPU live hinges
- Dimensions:
- Overall Length: 226mm (8.90in)
- From wrist base screw to extended finger tips
- Overall Width: 195mm (7.68in)
- From palm to extended thumb
- Width at Palm: 113mm (4.45in)
- Thickness at Palm: 53.5mm (2.11in)
- Overall Length: 226mm (8.90in)
- Weight: Approx. 685g (1.5lbs)
- Wrist Attachment:
- Four M3 screws
- Wrist adapter converts the four M3 screws to one M12mm-1.50x30mm or 1/2in-20x1-1/4in hex cap screw
- Lift Capacity:
- Approx. 27.2kg (60lbs)
- Using four finger hook power grip
- Degrees of freedom:
- Electrical:
- Input: RJ45 ethernet connection
- Pin 1: Gnd
- Pin 2: Vin (~7.4VDC input)
- Pin 3: Thumb Base Servo
- Pin 4: Pinky Servo
- Pin 5: Ring Finger Servo
- Pin 6: Middle Finger Servo
- Pin 7: Index Finger Servo
- Pin 8: Thumb Servo
- Enclosure: Dust and Water Resistant
- The enclosure and standard servos are not waterproof. Exposure to full water submersion or water jets is not recommended and may damage the electronics.
- Not certified or tested for international electrotechnical commission (IEC) ingress protection (IP) ratings.
- Input: RJ45 ethernet connection
- Mechanical:
- Licensing:
- The fingers and hinges for the robotic hand are adapted from Flexy-Hand by Gyrobot, used under CC BY-NC-SA 4.0
- Robotic Hand © 2026 by Jerod Nelson is licensed under CC BY-NC-SA 4.0