In order to improve spinning quality and production efficiency,the selection principle and effect of hardness and diameter of cots,and the key points of the use and management of cots are introduced,such as telescoping,grinding and maintenance,etc.,the yarn quality of compact spinning CJ 11.7 tex knitting yarn with LXC-966A cot and that of siro compact spin-ning CJ 36.4 tex knitting yarn with the same hardness cot is compared.It is pointed out that the selection of cots should be based on the quality requirements of yarn,spinning process and equipment performance.And do a good job of the selection and use management of cots are helpful to the yarn quality stability and spinning cost control.The LXC-966A cot has excellent performance and long service life,and it is suitable for spinning combed pure cotton siro com-pact spinning and compact spinning knitting yarn.
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