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Yarn Spinning Formulas

Formulas used for yarn spinning production including various yarn numbering system conversions.

5 29,730

Common Spinning Formulas

Grams per Meter0.5905 / Ne
Grams per Yard0.54 / Ne
Texden x .11 = 1000/Nm = Mic/25.4
NeNm/1.693
DRAFT(feed weight in g/m) / (delivery weight in g/m)
DRAFTTex (feed)/Tex(delivery)
DRAFTdelivery roll surface speed/feed roll surface speed
No. of hanks delivered by m/c(Length delivered in m/min)/1.605grams per meter = 0.5905/Ne

Carding

Production in kgs / hr( L x 1.0936 x 60 x effy ) / (hank (Ne) x 36 x 840 x 2.2045)

L – delivery speed in m/min
effy- efficiency
Ne – English count ( number of 840 yards in one pound)
840 – constant
2.2045- to convert from lbs to kilograms

Production in kgs / hr(L x Ktex x 60 x effy) / ( 1000 )

L – delivery speed in m/min
Ktex- sliver count in Ktex (kilotex)
effy – efficiency
1000- to convert to kilograms from grams

Production in kgs / 8 hrs(0.2836 x L x effy) / (Ne)

L – delivery speed in m/min
effy – efficiency
Ne – English count

Production / 8 hrs(Hank x Nd) /( Ne x 2.2045)

Hank = no of hank (840 yards)delivered by the machine
Nd = no of deliveries
Ne = hank of the material

Total draft in card(feed weight in g/m) / (sliver weight in g/m)

Drawframe

Break draftsurface speed of 2nd roller / surface speed of back roller
Main draftsurface speed of 1st roller / surface speed of 2nd( middle) roller
Total draftsurface speed of delivery roller / surface of feed roller
Production in kgs / 8 hrs(0.2836 x L x effy x Nd) / (Ne)

L – delivery speed in m/min
effy – efficiency
Ne – english count
Nd – No of delvieries

Production in kgs / hr(FRD x FRrpm x 3.14 x 60 x effy x Nd) / (Ne x 840 x 36 x 2.2045)

FRD – front roller dia in inches
FRrpm – front roller rpm
effy – efficiency
Ne – Sliver hank
Nd – number of deliveries

Speedframe & Ringframe

Twist / Inch (TPI)Spindle speed / FRS

FRS – front roller surface speed in inches/mi

FRS = FRrpm x 3.14 x FRDFRS – Front roller surface speed

FRD – front roller diamete

T.P.IT.M. x sqrt(count or hank)

T.M. – Twist multiplier
sqrt – square root

Production in kgs / 8 hrs(7.2 x SS x effy) / (TPI x Ne x 1000)

SS – spindle speed

Spindle speedm/min x TPI x 39.37
Hank deliveredspindle speed / ( tpi x 62.89)
Ring traveller speed in m/sec(spindle speed x ring dia in mm x 3.14) / (60 x 1000)

Winding

Production in kgs / 8 hrs(0.2836 x L x effy x Nd) / (Ne)

L – delivery speed in m/min
effy – efficiency
Ne – english count
Nd – No of delvieries

Production in kgs / hr( L x 1.0936 x 60 x effy ) / (hank (Ne) x 36 x 840 x 2.2045)

L – delivery speed in m/min
effy- efficiency
Ne – English count ( number of 840 yards in one pound)
840 – constant
2.2045- to convert from lbs to kilograms

5 Comments
  1. NAVEEN KUMAR GURRAM says

    how to increase noil percentage in comber e65 reiter

    what is meant by propack in autoconer aerlicon

  2. Gajanand Bihani says

    how to calculate TM for double yarn, say 2/60 cotton yarn.

  3. V.S. Shekhawat says

    Carding gauge in pv yarn

    1. Muhammad Esmaeel says

      card Engeenir Muhammad esmaeel
      Email
      Yasiresmaeel@yahoo.com

  4. gopal says

    wat is T.M explain twist multiplier

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