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Milking Efficiency and Durability of Milking Machine Inflations of Various Compoundings¹

Colorado State University, Fort Collins and Gates Rubber Company, Denver, Colorado

ABSTRACT

The idea has been prevalent among dairymen that milking machine inflations of synthetic rubber do not milk as well as natural inflations. Thus, despite a longer useful life for the synthetics, the suspected lower milking efficiency has been a deterrent to their use.

Rate of fat absorption by inflations has been shown (2) to vary markedly with composition of rubber.

This study was initiated in an attempt to learn whether inflations of different compounding would produce different rates of milking. In addition, it was hoped that some conclusions might be reached as to the decline in milking rate that might be encountered with continued usage of the inflations.

METHODS

The milking rate of ten different groups of milking machine inflations were studied with the Colorado State University Holstein-Friesian herd. Milking rate was determined as the percentage of total milk production which was produced in 2 min., as suggested by Beck et al. (1).

¹ Published with the approval of the Director, Colorado Agricultural Experiment Station, as Scientific Series Publication No. 636.