Walnut Cracker

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

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

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

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

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

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

• Weld the pegs shut at the ends by using a little heat so that they stay in place.

• 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 [1]

• Small scale agriculture [2]
• Food and agriculture [3]