Effect of Teat Cup Liner Diameter and Mouthpiece on the Milking Rate, Machine Stripping, and Mastitis of Dairy Cows

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Abstract
Milking machines equipped with teat cup liners having bore diameters of 7/8, 1 1/16 and 1 1/4 in. and 2 types of mouthpieces were used to milk dairy cows. There were no significant differences in milking rate due to bore diameter. The type of mouthpiece did not affect the rate of milk flow nor the machine stripping time. It was more difficulty to keep the narrow bore liners and solid mouthpiece liners attached to the cows'' teats. The bore diameter and type of mouthpiece did not influence the degree of udder irritation or new mastitis infection rate of cows. Under the conditions of this experiment, the narrow-bore molded liner had no advantage for milking cows over the medium- or wide-bore molded liners.

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