Skip to content
ENExplore Calculators

Spindle Output Calculator

Work out spindle output instantly with clear inputs, formula shown and shareable results.

About Spindle Output Calculator

Ring frame delivery speed is spindle rpm divided by twist per inch, and twist per inch is the twist multiplier times the square root of the English count. Converting delivery length to weight through the count gives output per spindle hour, which multiplied by spindles and hours gives mill production.

Formulas

Twist and delivery

TPI = twist multiplier x sqrt(Ne); delivery (inch/min) = spindle rpm / TPI

Production

Weight = delivery length x tex; tex = 590.5 / Ne

Worked example

With the default values below, Spindle Output Calculator returns Mill Production Per Day of 15,565.50. Change any input above and every figure here is recalculated in your browser.

Inputs used

Number Of Spindlesminimum 1
25,000
Spindle Speedminimum 0.01 rpm
18,000 rpm
Yarn Countminimum 0.01 Ne
30 Ne
Twist Multiplierminimum 0.01
3.8

Results

Mill Production Per Day
15,565.50
Twist Per Inch
20.813
Grams Per Spindle Hour
25.9425
Yarn Delivery Speed
21.9666

Step by step

  1. 1Values used
  2. 2Twist and delivery
  3. 3Production
  4. 4Mill Production Per Day= 15,565.50
  5. 5Twist Per Inch= 20.813
  6. 6Grams Per Spindle Hour= 25.9425
  7. 7Yarn Delivery Speed= 21.9666

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why does higher twist reduce output?

Every turn of twist requires one spindle revolution, so at fixed spindle speed more twist means less yarn delivered. Twist is set by yarn strength and hand requirements, not by productivity.

What twist multiplier is normal?

3.2-3.6 for weft and knitting yarns, 3.8-4.3 for warp, and above 4.5 for voile and crepe. Higher multipliers give stronger, harder yarn at lower output.

Related Calculators

Spindle Output Calculator | Calcrivo