Formulas and common terms used in Textile Spinning Mills

1. Yarn count (C) = Lease (L) x Draft (D) / Spindle speed (RPM)
2. Lease (L) = Yarn count (C) x Spindle speed (RPM) / Draft (D)
3. Spindle speed (RPM) = Twist (T) x Lease (L) / Yarn count (C)
4. Draft (D) = Yarn count (C) x Lease (L) / Spindle speed (RPM)
5. Number of twists per inch (TPI) = Twist (T) / Yarn count (C)
6. Twist (T) = Yarn count (C) x TPI

These may vary depending on the type of yarn and spinning method used.

Here are some common terms used in textile spinning mills:

1. Spindle: A rotating shaft used to hold and spin yarn.
2. Bobbin: A cylindrical object onto which yarn is wound.
3. Spinning frame: A machine used to spin yarn from fibers.
4. Yarn: A continuous strand of fibers, twisted together to make a thread.
5. Fiber: A unit of matter that is flexible, has a length at least 100 times its width, and is composed of cellulose or protein.
6. Twist: The number of turns per unit length in a yarn.
7. Spinning: The process of making yarn from fibers.
8. Count: A measure of the fineness or coarseness of yarn, typically measured in the number of hanks per pound.
9. Lease: The number of strands of fiber that are combined to make a yarn.
10. Draft: The ratio of the weight of the fibers to the weight of the yarn produced.
11. TPI: Twist per Inch, the number of turns of twist in one inch of yarn.
12. Spinning Ratio: The ratio of the feed roll speed to the delivery roll speed.
13. Drafting: The process of stretching and thinning fibers before they are spun into yarn.
14. Spinning triangle: A triangular device that guides fibers into a spinning frame.
15. Clearer: A device that removes knots, tangles and other impurities from fibers before spinning.
16. Comber: A machine that removes short fibers, called noils, from longer fibers before spinning.
17. Roving: A semi-finished yarn that is ready to be spun into a final yarn.

Note: These terms may vary depending on the specific spinning process used.