▼This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing

Please leave comments using the talk page. The course runs in the Fall semester. It is not open edit.

Dried nuts such as walnut are grown in countries like Brazil and India Predominantly. The farmers are usually small land owners with little to no requirement for machinery. For these small scale farmers, cracking walnut with hand crusher is a tedious task and to overcome the issues of ergonomics and usability, the following walnut cracker is designed.

Bill of Materials

1. PLA filament- $2
   1. https://www.youmagine.com/designs/walnut-cracker-40-28

Tools needed

1. MOST Delta RepRap or similar RepRap 3-D printer
2. PLA Filament

Skills and knowledge needed

• If you used special skill – link to relevant wikipedia or wikiversity articles/courses

Technical Specifications and Assembly Instructions

1. From the above mentioned link of Youmagine,, Download all the STL files and print one of each stl file with infill of more than 30%.
2. Time to assembly is less then 5 minutes

Steps to Construct

1

Print out the parts

2

Insert the peg between press_cylinder and support_arm.

3

Insert the peg between the upper support arm and the handle.

4

Insert the last peg between the cylinder and the handle

5

Completed Prototype

Cost savings

• Commercially available solution cost upwards of $60.

1. The cost to print this device is $2
2. Saves the user anywhere between $58 to $80 and hence this device costs only about 3% of the commercially available version
3. commercial model

Benefited Internet Communities

• Small scale agriculture
• Food and agriculture