Bici Desgranadora de Maíz
Bici Desgranadora is a pedal powered corn sheller machine designed to reduce manual labour.
Bici Desgranadora de Maíz is a pedal powered corn shelling machine. The machine uses bicycle parts combined with a corn sheller to decrease manual labor and time required during harvesting time.
Latin America, specifically Guatemala and Mexico.
Bici-Tec distributes the product directly and works with community leaders to distribute it.Interview with representative
$277 USD (converted from quetzales), Bici-Tec also donates the product partially or completely to families with great need.Interview with representative.
Untrained individuals, small farm holders who are usually families.
Made to order, the building methods are half artisanal and half industrial.
Open source, through Bici-Tec’s Escuela De Bici-Tecnología Apropriada students can learn how to build and design pedal powered machines such as the bici desgranadora de maíz.
~2,000 Interview with representative
Capacity of sheller, measured in kilograms per hour
Is the sheller manually operated or is it motorized?
Size of holes on the sieves, measured in millimeters
Rate of efficiency of the sheller
The material used in construction
List of crops that this technology shells
Overall percentage of nuts broken
The product is stationary and pedal powered, it requires no electricity to be operated. It is made from used bicycle parts such as pedals, frame, chains and handles. The pedaling system is connected to a cement flywheel to facilitate continuous pedaling and uses sprockets’ diameter relation to vary speed and torque. The system is connected to a corn sheller in a position where the same person pedaling can feed it.Interview with representative
Bici-Tec trains users at the moment of delivering the product on how to give preventative maintenance. If needed Bici-Tec can also do any repairs or additional technical support.Interview with representative
Available at Bici-Tec and locally available at bike shops.Interview with representative
The product can be reused afterwards to make more bici maquinas or recycled at a common recycling center since most of the structure is steel.
It can shell up to 200 pounds of corn in one day
According to users it can shell between 1,500 and 2,000 pounds a day if used from 8:00 am to 3:00 pm, family members take turns pedaling. This is 7 times faster than manual shelling. User experience report
Risk of catching items on exposed rotating components.
Bici-Tec teaches, empowers, and encourages people to use pedal powered machines (bici maquinas) through their school Escuela De Bici-Tecnología Apropriada
Field tests Interview with representative
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