Definitions for "Stitches Per Inch"
Refers to the number of the stitches made in one inch of seam, starting at a needle penetration and measuring the lengths of thread between needle penetrations.
The term describes the number of stitches in a seam in a given inch. Should not be measured on machine start-up or rundown; machine should be running at full speed.
Number of yarn tufts per running inch along the length of the carpet (as opposed to the gauge which is the number of stitches across the width of the carpet).