CTI Ewing Grinder
Compatible Technology International
CTI Ewing Grinder is used to create flour and pastes from grains and nuts.
CTI’s Ewing Grinder is a hand-operated burr mill capable of making peanut butter, cocoa butter, maize flour, and dozens of other products. The Ewing Grinder is portable and equipped with heat-treated burrs that never require sharpening and can withstand long-term wear.
No specific target regions. The grinders are used in dozens of countries, including the United States. The majority of the grinders are utilized in Subsaharan Africa.Interview with representative
Subsidized Price (grinder must be purchased for a social cause):
Shipped within the US, 2-5 day shipping – $210
Shipped outside the US, 6-20 day shipping – $280
Full Price (with 30 percent of proceeds supporting CTI’s mission):
Shipped within the US, 2-5 day shipping – $300
Shipped outside the US, 6-20 day shipping – $370
Goal 8: promote sustainable economic growth and productive employment by reducing physical labor required for processing grains and nuts and reduce drudgery.
Home use and for businesses selling grinding services or nut paste.interview with representative
Mass produced in China.Interview with representative
The Ewing Grinder can be obtained directly from CTI.
More than 300 grinders have been distributed since this particular model was introduced in 2011.Interview with representative
List of crops that this technology mills
Rate of grain milling, measured in kilograms per hour
How is the technology powered?
Energy required to power the product, measured in watts
Is the technology movable?
14” L x 11” W x 6” H
Shipping weight: 6 kg (14 lbs)
Burrs: 4.5” diameter, hardened machined iron
Upon purchase CTI supplies a grinder manual, grinder training (either in-person or via Skype), and customer support via phone or email.
Ewing Grinder’s heat treated burrs never need to be resharpened and are designed to withstand long-term wear if maintained properly. To work properly the grinders must be cleaned after every use.
CTI lists output rates for eleven different crops on page 27 of the Ewing Grinder manual.
|EWING IV GRINDER OUTPUT TABLE|
|Crop||Product||Hand Crank (60 rpm)||Pedal Power (85 rpm)|
|Roasted Peanuts||Peanut Paste||7 Kg/hour||11 kg/hour|
|Dry Maize||Cracked Maize||16 kg/hour||22 kg/hour|
|Dry Cranked Maize||Maize Flour||14 kg/hour||20 kg/hour|
|Hulled Millet||Millet Flour||20 kg/hour||28 kg/hour|
|Hulled Sorghum||Sorghum Flour||18 kg/hour||25 kg/hour|
|Roasted Coffee||Ground Coffee||15 kg/hour||21 kg/hour|
|Sesame Seed||Sesame Paste||12 kg/hour||17 kg/hour|
|Dry Beans||Bean Flour||10 kg/hour||14 kg/hour|
|Tef||Tef Flour||6 kg/hour||9 kg/hour|
|Unhulled Rice||Hulled Rice||15 kg/hour||21 kg/hour|
|Hulled Rice||Rice Flour||15 kg/hour||21 kg/hour|
Calderon, V., et al., 2011, Utilization of Compatible Technology International (CTI) grinders for sorghum flour production in Central America. INTSORMIL Presentations.
CTI plans on replacing the current Ewing Grinder with a new version that can either be hand operated or motorized (along with a few other improvements).Interview with representative
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