Reference what is a tug machine? I worked for Firestone in Memphis for 40 years. The plant in Memphis had a large machine called a tug machine. Tires from final inspection were were run through the machine. It popped the tire on a rim, filled it with air, spun the tire a few rounds, marked the bead with some marks that represented the grade and then sent it down the conveyor. The grade had to do with balance and what they called lateral and radial run out. All OE manufactures had their specs on tires they would accept. The Memphis plant closed in 1982 and plants may use some different methods now.
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Today's Featured Article - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
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