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The following is a round up of technical specifications for the most popular can motor and “limited spec” strap motor types. The specs are extracted from USRA rules and practice and serve as a guidline for most can and restricted motor classes raced worldwide.
As a rule the specs define “Box Stock” motors for standard classes. Many classes raced around the world can vary in overall specification in regard to magnet size / type, can length, endbell configuration, brush hardware and bearings.
In many standard classes ballraces are not allowed and one may only use the standard “Oilite” bearings as supplied by the manufacturer. Racers are advised to check “local rules” in regard to any legal modifications for a specific class.
Thanks also go to Robert Root of RJR who helped advise on the data.
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